add Bitkey

D David Veksler · 1 year ago c8e3ddc9c7b0a683241f0ac49e42ec3e44211291
Parent: 4450d6ff7

1 file changed +3976 −1502

Diff

diff --git a/bitcoin-wallet.html b/bitcoin-wallet.html
index aa7fba3..e01766e 100644
--- a/bitcoin-wallet.html
+++ b/bitcoin-wallet.html
@@ -1,1628 +1,4102 @@
 <!DOCTYPE html>
 <html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <!-- Updated Metadata -->
-    <title>Bitcoin Wallet Cheatsheet: Secure Your Crypto (Self-Custody Guide)</title>
-    <meta name="description" content="Understand Bitcoin wallets, secure your keys with hardware & cold storage, and practice safe self-custody. Covers basics, security, operations, hardware comparisons (Trezor, Coldcard, Ledger), and advanced concepts.">
+    <title>
+      Bitcoin Wallet Cheatsheet: Secure Your Crypto (Self-Custody Guide)
+    </title>
+    <meta
+      name="description"
+      content="Understand Bitcoin wallets, secure your keys with hardware & cold storage, and practice safe self-custody. Covers basics, security, operations, hardware comparisons (Trezor, Coldcard, Ledger), and advanced concepts."
+    />
     <!-- CORRECTED Canonical URL -->
-    <link rel="canonical" href="https://cheatsheets.davidveksler.com/bitcoin-wallet.html">
+    <link
+      rel="canonical"
+      href="https://cheatsheets.davidveksler.com/bitcoin-wallet.html"
+    />
 
     <!-- Social Media Metadata (Updated URL) -->
-    <meta property="og:title" content="Bitcoin Wallet Cheatsheet: Secure Your Crypto (Self-Custody Guide)">
-    <meta property="og:description" content="Your guide to understanding Bitcoin wallets, securing your keys with hardware and cold storage, and practicing safe self-custody.">
-    <meta property="og:type" content="article">
-    <meta property="og:url" content="https://cheatsheets.davidveksler.com/bitcoin-wallet.html">
-    <meta property="og:image" content="https://cheatsheets.davidveksler.com/images/bitcoin-og.png">
-    <meta property="og:image:alt" content="Cyberpunk styled diagram showing Bitcoin wallet concepts.">
-    <meta name="twitter:card" content="summary_large_image">
-    <meta name="twitter:title" content="Bitcoin Wallet Cheatsheet: Secure Your Crypto (Self-Custody Guide)">
-    <meta name="twitter:description" content="Your guide to understanding Bitcoin wallets, securing your keys with hardware and cold storage, and practicing safe self-custody.">
-    <meta name="twitter:image" content="https://cheatsheets.davidveksler.com/images/bitcoin-og.png">
-    <meta name="twitter:image:alt" content="Cyberpunk styled diagram showing Bitcoin wallet concepts.">
+    <meta
+      property="og:title"
+      content="Bitcoin Wallet Cheatsheet: Secure Your Crypto (Self-Custody Guide)"
+    />
+    <meta
+      property="og:description"
+      content="Your guide to understanding Bitcoin wallets, securing your keys with hardware and cold storage, and practicing safe self-custody."
+    />
+    <meta property="og:type" content="article" />
+    <meta
+      property="og:url"
+      content="https://cheatsheets.davidveksler.com/bitcoin-wallet.html"
+    />
+    <meta
+      property="og:image"
+      content="https://cheatsheets.davidveksler.com/images/bitcoin-og.png"
+    />
+    <meta
+      property="og:image:alt"
+      content="Cyberpunk styled diagram showing Bitcoin wallet concepts."
+    />
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta
+      name="twitter:title"
+      content="Bitcoin Wallet Cheatsheet: Secure Your Crypto (Self-Custody Guide)"
+    />
+    <meta
+      name="twitter:description"
+      content="Your guide to understanding Bitcoin wallets, securing your keys with hardware and cold storage, and practicing safe self-custody."
+    />
+    <meta
+      name="twitter:image"
+      content="https://cheatsheets.davidveksler.com/images/bitcoin-og.png"
+    />
+    <meta
+      name="twitter:image:alt"
+      content="Cyberpunk styled diagram showing Bitcoin wallet concepts."
+    />
 
-    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">
-    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.min.css">
-    <link rel="preconnect" href="https://fonts.googleapis.com">
-    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&family=Fira+Code:wght@400;600&family=Orbitron:[email protected]&display=swap" rel="stylesheet">
+    <link
+      href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
+      rel="stylesheet"
+    />
+    <link
+      rel="stylesheet"
+      href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.min.css"
+    />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&family=Fira+Code:wght@400;600&family=Orbitron:[email protected]&display=swap"
+      rel="stylesheet"
+    />
 
     <style>
-        /* --- CSS Styles remain unchanged as requested --- */
-        @keyframes subtleDataStream {
-            0% { background-position: 0 0; }
-            100% { background-position: 0 60px; } /* Vertical movement for stream */
+      /* --- CSS Styles remain unchanged as requested --- */
+      @keyframes subtleDataStream {
+        0% {
+          background-position: 0 0;
         }
+        100% {
+          background-position: 0 60px;
+        } /* Vertical movement for stream */
+      }
 
-        @keyframes pulseGlowIntense {
-            0% { box-shadow: 0 0 8px 1px var(--category-color-glow), 0 4px 10px rgba(0,0,0, 0.4), inset 0 0 5px rgba(0,0,0,0.2); }
-            50% { box-shadow: 0 0 20px 5px var(--category-color-glow), 0 6px 15px rgba(0,0,0, 0.5), inset 0 0 10px rgba(0,0,0,0.3); }
-            100% { box-shadow: 0 0 8px 1px var(--category-color-glow), 0 4px 10px rgba(0,0,0, 0.4), inset 0 0 5px rgba(0,0,0,0.2); }
+      @keyframes pulseGlowIntense {
+        0% {
+          box-shadow: 0 0 8px 1px var(--category-color-glow),
+            0 4px 10px rgba(0, 0, 0, 0.4), inset 0 0 5px rgba(0, 0, 0, 0.2);
         }
+        50% {
+          box-shadow: 0 0 20px 5px var(--category-color-glow),
+            0 6px 15px rgba(0, 0, 0, 0.5), inset 0 0 10px rgba(0, 0, 0, 0.3);
+        }
+        100% {
+          box-shadow: 0 0 8px 1px var(--category-color-glow),
+            0 4px 10px rgba(0, 0, 0, 0.4), inset 0 0 5px rgba(0, 0, 0, 0.2);
+        }
+      }
 
-        @keyframes flowLineGradient {
-             0% { background-position: -100% 0; }
-             100% { background-position: 100% 0; }
+      @keyframes flowLineGradient {
+        0% {
+          background-position: -100% 0;
         }
+        100% {
+          background-position: 100% 0;
+        }
+      }
 
-        :root {
-            /* Core Palette - Deeper Cyberpunk Dark */
-            --bg-main: #0a0c10;         /* Even darker */
-            --bg-container: #11151c;    /* Darker gray/blue */
-            --bg-card: #1c2128;         /* Dark slate gray */
-            --bg-card-content: #22272e; /* Slightly lighter slate */
-            --text-primary: #d1d5db;    /* Light gray for readability */
-            --text-secondary: #9ca3af;  /* Mid gray */
-            --text-heading: #f0f6fc;    /* Brighter off-white */
-            --border-color: #373e47;    /* Subtle border color */
-            --accent-primary: #6cb6ff;  /* Lighter Vibrant Blue */
-            --accent-primary-dark: #58a6ff;
-            --accent-primary-glow: rgba(108, 182, 255, 0.6);
-            --critical-color: #ff7b72; /* Brighter Neon Red */
-            --rule-border-color: var(--critical-color);
-            --rule-bg-color: rgba(255, 123, 114, 0.15); /* Slightly stronger bg */
-            --btc-orange: #f7931a;
-            --btc-orange-glow: rgba(247, 147, 26, 0.7);
-            --btc-orange-subtle-glow: rgba(247, 147, 26, 0.4);
+      :root {
+        /* Core Palette - Deeper Cyberpunk Dark */
+        --bg-main: #0a0c10; /* Even darker */
+        --bg-container: #11151c; /* Darker gray/blue */
+        --bg-card: #1c2128; /* Dark slate gray */
+        --bg-card-content: #22272e; /* Slightly lighter slate */
+        --text-primary: #d1d5db; /* Light gray for readability */
+        --text-secondary: #9ca3af; /* Mid gray */
+        --text-heading: #f0f6fc; /* Brighter off-white */
+        --border-color: #373e47; /* Subtle border color */
+        --accent-primary: #6cb6ff; /* Lighter Vibrant Blue */
+        --accent-primary-dark: #58a6ff;
+        --accent-primary-glow: rgba(108, 182, 255, 0.6);
+        --critical-color: #ff7b72; /* Brighter Neon Red */
+        --rule-border-color: var(--critical-color);
+        --rule-bg-color: rgba(255, 123, 114, 0.15); /* Slightly stronger bg */
+        --btc-orange: #f7931a;
+        --btc-orange-glow: rgba(247, 147, 26, 0.7);
+        --btc-orange-subtle-glow: rgba(247, 147, 26, 0.4);
 
+        /* Bitcoin Category Colors (Neon Emphasis) */
+        --btc-color-concept: #9ca3af;
+        --btc-glow-concept: rgba(156, 163, 175, 0.5);
+        --btc-color-hot: #ff7b72;
+        --btc-glow-hot: rgba(255, 123, 114, 0.7); /* Neon Red */
+        --btc-color-cold: #6cb6ff;
+        --btc-glow-cold: rgba(108, 182, 255, 0.6); /* Neon Blue */
+        --btc-color-operations: #56d364;
+        --btc-glow-operations: rgba(86, 211, 100, 0.6); /* Neon Green */
+        --btc-color-security: #f778ba;
+        --btc-glow-security: rgba(247, 120, 186, 0.6); /* Neon Pink */
+        --btc-color-advanced: #c39ac5;
+        --btc-glow-advanced: rgba(195, 154, 197, 0.6); /* Neon Purple */
+        --btc-color-comparison: #79c0ff;
+        --btc-glow-comparison: rgba(121, 192, 255, 0.6); /* Light Neon Blue */
+        --btc-color-pitfalls: #f7c85c;
+        --btc-glow-pitfalls: rgba(247, 200, 92, 0.7); /* Neon Yellow */
+        --btc-color-glossary: #8b949e;
+        --btc-glow-glossary: rgba(139, 148, 158, 0.5);
+        --btc-color-resources: #56d364;
+        --btc-glow-resources: rgba(86, 211, 100, 0.6); /* Neon Green again */
 
-            /* Bitcoin Category Colors (Neon Emphasis) */
-            --btc-color-concept:      #9ca3af; --btc-glow-concept:      rgba(156, 163, 175, 0.5);
-            --btc-color-hot:          #ff7b72; --btc-glow-hot:          rgba(255, 123, 114, 0.7); /* Neon Red */
-            --btc-color-cold:         #6cb6ff; --btc-glow-cold:         rgba(108, 182, 255, 0.6); /* Neon Blue */
-            --btc-color-operations:   #56d364; --btc-glow-operations:   rgba(86, 211, 100, 0.6); /* Neon Green */
-            --btc-color-security:     #f778ba; --btc-glow-security:     rgba(247, 120, 186, 0.6); /* Neon Pink */
-            --btc-color-advanced:     #c39ac5; --btc-glow-advanced:     rgba(195, 154, 197, 0.6); /* Neon Purple */
-            --btc-color-comparison:   #79c0ff; --btc-glow-comparison:   rgba(121, 192, 255, 0.6); /* Light Neon Blue */
-            --btc-color-pitfalls:     #f7c85c; --btc-glow-pitfalls:     rgba(247, 200, 92, 0.7);  /* Neon Yellow */
-            --btc-color-glossary:     #8b949e; --btc-glow-glossary:     rgba(139, 148, 158, 0.5);
-            --btc-color-resources:    #56d364; --btc-glow-resources:    rgba(86, 211, 100, 0.6);  /* Neon Green again */
+        --category-color: var(--btc-color-concept); /* Default */
+        --category-color-glow: var(--btc-glow-concept);
+        color-scheme: dark;
+      }
 
-            --category-color: var(--btc-color-concept); /* Default */
-            --category-color-glow: var(--btc-glow-concept);
-            color-scheme: dark;
-        }
+      body {
+        background-color: var(--bg-main);
+        /* Animated "data stream" background */
+        background-image: linear-gradient(
+            0deg,
+            rgba(13, 17, 23, 0) 0%,
+            rgba(88, 166, 255, 0.03) 50%,
+            rgba(13, 17, 23, 0) 100%
+          ),
+          linear-gradient(90deg, rgba(48, 54, 61, 0.1) 1px, transparent 1px),
+          linear-gradient(0deg, rgba(48, 54, 61, 0.1) 1px, transparent 1px);
+        background-size: 100% 60px, 40px 40px, 40px 40px; /* stream height, grid x, grid y */
+        animation: subtleDataStream 4s linear infinite;
 
-        body {
-            background-color: var(--bg-main);
-            /* Animated "data stream" background */
-            background-image:
-                linear-gradient(0deg, rgba(13, 17, 23, 0) 0%, rgba(88, 166, 255, 0.03) 50%, rgba(13, 17, 23, 0) 100%),
-                linear-gradient(90deg, rgba(48, 54, 61, 0.1) 1px, transparent 1px),
-                linear-gradient(0deg, rgba(48, 54, 61, 0.1) 1px, transparent 1px);
-            background-size: 100% 60px, 40px 40px, 40px 40px; /* stream height, grid x, grid y */
-            animation: subtleDataStream 4s linear infinite;
+        color: var(--text-primary);
+        font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
+          Roboto, Helvetica, Arial, sans-serif; /* Modern Sans-serif */
+        padding-bottom: 3rem;
+        font-size: 15px;
+        box-sizing: border-box;
+        line-height: 1.7; /* Increased line height */
+      }
+      *,
+      *::before,
+      *::after {
+        box-sizing: inherit;
+      }
 
-            color: var(--text-primary);
-            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; /* Modern Sans-serif */
-            padding-bottom: 3rem;
-            font-size: 15px;
-            box-sizing: border-box;
-            line-height: 1.7; /* Increased line height */
-        }
-         *, *::before, *::after { box-sizing: inherit; }
-
-        /* --- Bitcoin Header Styling --- */
-        .page-header {
-            background:
-                linear-gradient(135deg, rgba(247, 147, 26, 0.08) 0%, transparent 30%),
-                linear-gradient(225deg, rgba(247, 147, 26, 0.05) 0%, transparent 30%),
-                linear-gradient(45deg, rgba(48, 54, 61, 0.1) 0%, transparent 50%),
-                var(--bg-container);
-            backdrop-filter: blur(2px);
-            padding: 3rem 1.5rem;
-            text-align: center;
-            border-bottom: 1px solid var(--border-color);
-            margin-bottom: 3rem;
-            position: relative;
-            z-index: 10;
-            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.4), inset 0 0 15px rgba(0,0,0,0.3);
-            overflow: hidden;
-        }
+      /* --- Bitcoin Header Styling --- */
+      .page-header {
+        background: linear-gradient(
+            135deg,
+            rgba(247, 147, 26, 0.08) 0%,
+            transparent 30%
+          ),
+          linear-gradient(225deg, rgba(247, 147, 26, 0.05) 0%, transparent 30%),
+          linear-gradient(45deg, rgba(48, 54, 61, 0.1) 0%, transparent 50%),
+          var(--bg-container);
+        backdrop-filter: blur(2px);
+        padding: 3rem 1.5rem;
+        text-align: center;
+        border-bottom: 1px solid var(--border-color);
+        margin-bottom: 3rem;
+        position: relative;
+        z-index: 10;
+        box-shadow: 0 5px 25px rgba(0, 0, 0, 0.4),
+          inset 0 0 15px rgba(0, 0, 0, 0.3);
+        overflow: hidden;
+      }
 
-        .page-header::before,
-        .page-header::after {
-            content: '';
-            position: absolute;
-            width: 20px; height: 20px;
-            border-color: var(--btc-orange); border-style: solid;
-            opacity: 0.7; filter: drop-shadow(0 0 4px var(--btc-orange-glow));
-            transition: all 0.3s ease;
-        }
-        .page-header::before { top: 10px; left: 10px; border-width: 2px 0 0 2px; border-top-left-radius: 5px; }
-        .page-header::after { bottom: 10px; right: 10px; border-width: 0 2px 2px 0; border-bottom-right-radius: 5px; }
-        .page-header:hover::before,
-        .page-header:hover::after { width: 25px; height: 25px; opacity: 1; filter: drop-shadow(0 0 8px var(--btc-orange-glow)); }
+      .page-header::before,
+      .page-header::after {
+        content: "";
+        position: absolute;
+        width: 20px;
+        height: 20px;
+        border-color: var(--btc-orange);
+        border-style: solid;
+        opacity: 0.7;
+        filter: drop-shadow(0 0 4px var(--btc-orange-glow));
+        transition: all 0.3s ease;
+      }
+      .page-header::before {
+        top: 10px;
+        left: 10px;
+        border-width: 2px 0 0 2px;
+        border-top-left-radius: 5px;
+      }
+      .page-header::after {
+        bottom: 10px;
+        right: 10px;
+        border-width: 0 2px 2px 0;
+        border-bottom-right-radius: 5px;
+      }
+      .page-header:hover::before,
+      .page-header:hover::after {
+        width: 25px;
+        height: 25px;
+        opacity: 1;
+        filter: drop-shadow(0 0 8px var(--btc-orange-glow));
+      }
 
-        .page-header h1 {
-            color: var(--text-heading); font-weight: 300; letter-spacing: 1.5px;
-            margin-bottom: 0.7rem; font-size: 2.8rem;
-            text-shadow: 0 0 15px var(--btc-orange-glow), 0 0 5px var(--btc-orange-subtle-glow);
-        }
-        .page-header h1 .bi.bi-currency-bitcoin {
-            font-size: 0.9em; vertical-align: -0.08em; margin-right: 0.4em;
-            color: var(--btc-orange); filter: drop-shadow(0 0 8px var(--btc-orange-glow));
-        }
-        /* Updated Lead Text */
-        .page-header .lead {
-            color: var(--text-secondary); font-size: 1.15rem; max-width: 800px;
-            margin: 0.5rem auto 0 auto; text-shadow: 0 1px 2px rgba(0,0,0,0.5);
-        }
-        /* --- End Bitcoin Header Styling --- */
+      .page-header h1 {
+        color: var(--text-heading);
+        font-weight: 300;
+        letter-spacing: 1.5px;
+        margin-bottom: 0.7rem;
+        font-size: 2.8rem;
+        text-shadow: 0 0 15px var(--btc-orange-glow),
+          0 0 5px var(--btc-orange-subtle-glow);
+      }
+      .page-header h1 .bi.bi-currency-bitcoin {
+        font-size: 0.9em;
+        vertical-align: -0.08em;
+        margin-right: 0.4em;
+        color: var(--btc-orange);
+        filter: drop-shadow(0 0 8px var(--btc-orange-glow));
+      }
+      /* Updated Lead Text */
+      .page-header .lead {
+        color: var(--text-secondary);
+        font-size: 1.15rem;
+        max-width: 800px;
+        margin: 0.5rem auto 0 auto;
+        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
+      }
+      /* --- End Bitcoin Header Styling --- */
 
-        .schema-container {
-            padding: 0 1rem 0.5rem 1rem; margin-bottom: 3rem; position: relative;
-        }
+      .schema-container {
+        padding: 0 1rem 0.5rem 1rem;
+        margin-bottom: 3rem;
+        position: relative;
+      }
 
-        .section-title {
-            color: var(--category-color); margin: 0 0 2rem 0; font-weight: 500;
-            text-transform: uppercase; letter-spacing: 0.12em; font-size: 1rem;
-            border-bottom: 1px solid var(--border-color);
-            padding: 0.5rem 0; display: block; position: relative; z-index: 15;
-            text-shadow: 0 0 8px var(--category-color-glow);
-        }
-        /* Apply category colors vars */
-        .cat-concept > .section-title { --category-color: var(--btc-color-concept); --category-color-glow: var(--btc-glow-concept);}
-        .cat-hot > .section-title { --category-color: var(--btc-color-hot); --category-color-glow: var(--btc-glow-hot);}
-        .cat-cold > .section-title { --category-color: var(--btc-color-cold); --category-color-glow: var(--btc-glow-cold);}
-        .cat-operations > .section-title { --category-color: var(--btc-color-operations); --category-color-glow: var(--btc-glow-operations);}
-        .cat-security > .section-title { --category-color: var(--btc-color-security); --category-color-glow: var(--btc-glow-security);}
-        .cat-advanced > .section-title { --category-color: var(--btc-color-advanced); --category-color-glow: var(--btc-glow-advanced);}
-        .cat-comparison > .section-title { --category-color: var(--btc-color-comparison); --category-color-glow: var(--btc-glow-comparison);}
-        .cat-pitfalls > .section-title { --category-color: var(--btc-color-pitfalls); --category-color-glow: var(--btc-glow-pitfalls);}
-        .cat-glossary > .section-title { --category-color: var(--btc-color-glossary); --category-color-glow: var(--btc-glow-glossary);}
-        .cat-resources > .section-title { --category-color: var(--btc-color-resources); --category-color-glow: var(--btc-glow-resources);}
+      .section-title {
+        color: var(--category-color);
+        margin: 0 0 2rem 0;
+        font-weight: 500;
+        text-transform: uppercase;
+        letter-spacing: 0.12em;
+        font-size: 1rem;
+        border-bottom: 1px solid var(--border-color);
+        padding: 0.5rem 0;
+        display: block;
+        position: relative;
+        z-index: 15;
+        text-shadow: 0 0 8px var(--category-color-glow);
+      }
+      /* Apply category colors vars */
+      .cat-concept > .section-title {
+        --category-color: var(--btc-color-concept);
+        --category-color-glow: var(--btc-glow-concept);
+      }
+      .cat-hot > .section-title {
+        --category-color: var(--btc-color-hot);
+        --category-color-glow: var(--btc-glow-hot);
+      }
+      .cat-cold > .section-title {
+        --category-color: var(--btc-color-cold);
+        --category-color-glow: var(--btc-glow-cold);
+      }
+      .cat-operations > .section-title {
+        --category-color: var(--btc-color-operations);
+        --category-color-glow: var(--btc-glow-operations);
+      }
+      .cat-security > .section-title {
+        --category-color: var(--btc-color-security);
+        --category-color-glow: var(--btc-glow-security);
+      }
+      .cat-advanced > .section-title {
+        --category-color: var(--btc-color-advanced);
+        --category-color-glow: var(--btc-glow-advanced);
+      }
+      .cat-comparison > .section-title {
+        --category-color: var(--btc-color-comparison);
+        --category-color-glow: var(--btc-glow-comparison);
+      }
+      .cat-pitfalls > .section-title {
+        --category-color: var(--btc-color-pitfalls);
+        --category-color-glow: var(--btc-glow-pitfalls);
+      }
+      .cat-glossary > .section-title {
+        --category-color: var(--btc-color-glossary);
+        --category-color-glow: var(--btc-glow-glossary);
+      }
+      .cat-resources > .section-title {
+        --category-color: var(--btc-color-resources);
+        --category-color-glow: var(--btc-glow-resources);
+      }
 
-        /* --- Card Styling ("Nodes" v2) --- */
-        .info-card {
-            background-color: var(--bg-card); border: 1px solid var(--border-color);
-            border-radius: 6px; box-shadow: 0 4px 12px rgba(0,0,0, 0.3), inset 0 0 8px rgba(0,0,0,0.2);
-            height: 100%; display: flex; flex-direction: column;
-            transition: all 0.3s ease; position: relative; z-index: 5; overflow: hidden;
-            --category-color: inherit; --category-color-glow: inherit; /* Prepare for hover */
-        }
+      /* --- Card Styling ("Nodes" v2) --- */
+      .info-card {
+        background-color: var(--bg-card);
+        border: 1px solid var(--border-color);
+        border-radius: 6px;
+        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3),
+          inset 0 0 8px rgba(0, 0, 0, 0.2);
+        height: 100%;
+        display: flex;
+        flex-direction: column;
+        transition: all 0.3s ease;
+        position: relative;
+        z-index: 5;
+        overflow: hidden;
+        --category-color: inherit;
+        --category-color-glow: inherit; /* Prepare for hover */
+      }
 
-        /* Apply category color vars */
-        .info-card.btc-type-concept { --category-color: var(--btc-color-concept); --category-color-glow: var(--btc-glow-concept);}
-        .info-card.btc-type-intro { --category-color: var(--btc-orange); --category-color-glow: var(--btc-orange-glow);} /* Bitcoin Orange for Intro */
-        .info-card.btc-type-software { --category-color: var(--btc-color-hot); --category-color-glow: var(--btc-glow-hot);}
-        .info-card.btc-type-web { --category-color: var(--btc-color-hot); --category-color-glow: var(--btc-glow-hot); filter: brightness(0.85); }
-        .info-card.btc-type-hardware { --category-color: var(--btc-color-cold); --category-color-glow: var(--btc-glow-cold);}
-        .info-card.btc-type-paper { --category-color: var(--btc-color-cold); --category-color-glow: var(--btc-glow-cold); filter: brightness(0.85); }
-        .info-card.btc-type-airgap { --category-color: var(--btc-color-cold); --category-color-glow: var(--btc-glow-cold);}
-        .info-card.btc-type-operation { --category-color: var(--btc-color-operations); --category-color-glow: var(--btc-glow-operations);}
-        .info-card.btc-type-security { --category-color: var(--btc-color-security); --category-color-glow: var(--btc-glow-security);}
-        .info-card.btc-type-advanced { --category-color: var(--btc-color-advanced); --category-color-glow: var(--btc-glow-advanced);}
-        .info-card.btc-type-comparison { --category-color: var(--btc-color-comparison); --category-color-glow: var(--btc-glow-comparison);} /* Applied */
-        .info-card.btc-type-pitfall { --category-color: var(--btc-color-pitfalls); --category-color-glow: var(--btc-glow-pitfalls);}
-        .info-card.btc-type-glossary { --category-color: var(--btc-color-glossary); --category-color-glow: var(--btc-glow-glossary);}
-        .info-card.btc-type-resource { --category-color: var(--btc-color-resources); --category-color-glow: var(--btc-glow-resources);}
+      /* Apply category color vars */
+      .info-card.btc-type-concept {
+        --category-color: var(--btc-color-concept);
+        --category-color-glow: var(--btc-glow-concept);
+      }
+      .info-card.btc-type-intro {
+        --category-color: var(--btc-orange);
+        --category-color-glow: var(--btc-orange-glow);
+      } /* Bitcoin Orange for Intro */
+      .info-card.btc-type-software {
+        --category-color: var(--btc-color-hot);
+        --category-color-glow: var(--btc-glow-hot);
+      }
+      .info-card.btc-type-web {
+        --category-color: var(--btc-color-hot);
+        --category-color-glow: var(--btc-glow-hot);
+        filter: brightness(0.85);
+      }
+      .info-card.btc-type-hardware {
+        --category-color: var(--btc-color-cold);
+        --category-color-glow: var(--btc-glow-cold);
+      }
+      .info-card.btc-type-paper {
+        --category-color: var(--btc-color-cold);
+        --category-color-glow: var(--btc-glow-cold);
+        filter: brightness(0.85);
+      }
+      .info-card.btc-type-airgap {
+        --category-color: var(--btc-color-cold);
+        --category-color-glow: var(--btc-glow-cold);
+      }
+      .info-card.btc-type-operation {
+        --category-color: var(--btc-color-operations);
+        --category-color-glow: var(--btc-glow-operations);
+      }
+      .info-card.btc-type-security {
+        --category-color: var(--btc-color-security);
+        --category-color-glow: var(--btc-glow-security);
+      }
+      .info-card.btc-type-advanced {
+        --category-color: var(--btc-color-advanced);
+        --category-color-glow: var(--btc-glow-advanced);
+      }
+      .info-card.btc-type-comparison {
+        --category-color: var(--btc-color-comparison);
+        --category-color-glow: var(--btc-glow-comparison);
+      } /* Applied */
+      .info-card.btc-type-pitfall {
+        --category-color: var(--btc-color-pitfalls);
+        --category-color-glow: var(--btc-glow-pitfalls);
+      }
+      .info-card.btc-type-glossary {
+        --category-color: var(--btc-color-glossary);
+        --category-color-glow: var(--btc-glow-glossary);
+      }
+      .info-card.btc-type-resource {
+        --category-color: var(--btc-color-resources);
+        --category-color-glow: var(--btc-glow-resources);
+      }
 
-        /* Circuit Board Corner Effect */
-        .info-card::before {
-            content: ''; position: absolute; top: -1px; left: -1px;
-            width: 15px; height: 15px; border-top: 2px solid var(--category-color);
-            border-left: 2px solid var(--category-color); border-radius: 6px 0 0 0;
-            opacity: 0.6; transition: all 0.3s ease;
-            filter: drop-shadow(0 0 3px var(--category-color-glow));
-        }
-        .info-card:hover::before { opacity: 1; width: 25px; height: 25px; filter: drop-shadow(0 0 6px var(--category-color-glow)); }
+      /* Circuit Board Corner Effect */
+      .info-card::before {
+        content: "";
+        position: absolute;
+        top: -1px;
+        left: -1px;
+        width: 15px;
+        height: 15px;
+        border-top: 2px solid var(--category-color);
+        border-left: 2px solid var(--category-color);
+        border-radius: 6px 0 0 0;
+        opacity: 0.6;
+        transition: all 0.3s ease;
+        filter: drop-shadow(0 0 3px var(--category-color-glow));
+      }
+      .info-card:hover::before {
+        opacity: 1;
+        width: 25px;
+        height: 25px;
+        filter: drop-shadow(0 0 6px var(--category-color-glow));
+      }
 
-        .info-card:hover {
-             transform: translateY(-4px) scale(1.01); z-index: 20;
-             animation: pulseGlowIntense 1.8s infinite ease-in-out;
-         }
+      .info-card:hover {
+        transform: translateY(-4px) scale(1.01);
+        z-index: 20;
+        animation: pulseGlowIntense 1.8s infinite ease-in-out;
+      }
 
-        .info-card .card-body { padding: 0; flex-grow: 1; display: flex; flex-direction: column; }
-        .info-card h5 {
-            color: var(--text-heading);
-            background: linear-gradient(135deg, var(--category-color) 0%, color-mix(in srgb, var(--category-color) 80%, black 20%) 100%);
-            font-size: 0.85rem; text-align: center; margin: 0; padding: 0.7rem 0.5rem;
-            font-weight: 600; display: flex; justify-content: center; align-items: center;
-            gap: .6rem; font-family: 'Orbitron', 'Fira Code', monospace;
-            border-bottom: 1px solid var(--border-color); border-radius: 5px 5px 0 0;
-            text-transform: uppercase; letter-spacing: 1px; text-shadow: 0 0 5px rgba(0,0,0,0.6);
-        }
-         .info-card h5 .bi { font-size: 1.2em; color: var(--text-heading); opacity: 1; filter: drop-shadow(0 0 3px rgba(0,0,0,0.6));}
-         .card-content-wrapper { padding: 1.1rem; flex-grow: 1; display: flex; flex-direction: column; }
-        .info-card p.summary { font-size: .88rem; color: var(--text-secondary); margin-bottom: 1rem; flex-grow: 1; line-height: 1.6;}
+      .info-card .card-body {
+        padding: 0;
+        flex-grow: 1;
+        display: flex;
+        flex-direction: column;
+      }
+      .info-card h5 {
+        color: var(--text-heading);
+        background: linear-gradient(
+          135deg,
+          var(--category-color) 0%,
+          color-mix(in srgb, var(--category-color) 80%, black 20%) 100%
+        );
+        font-size: 0.85rem;
+        text-align: center;
+        margin: 0;
+        padding: 0.7rem 0.5rem;
+        font-weight: 600;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+        gap: 0.6rem;
+        font-family: "Orbitron", "Fira Code", monospace;
+        border-bottom: 1px solid var(--border-color);
+        border-radius: 5px 5px 0 0;
+        text-transform: uppercase;
+        letter-spacing: 1px;
+        text-shadow: 0 0 5px rgba(0, 0, 0, 0.6);
+      }
+      .info-card h5 .bi {
+        font-size: 1.2em;
+        color: var(--text-heading);
+        opacity: 1;
+        filter: drop-shadow(0 0 3px rgba(0, 0, 0, 0.6));
+      }
+      .card-content-wrapper {
+        padding: 1.1rem;
+        flex-grow: 1;
+        display: flex;
+        flex-direction: column;
+      }
+      .info-card p.summary {
+        font-size: 0.88rem;
+        color: var(--text-secondary);
+        margin-bottom: 1rem;
+        flex-grow: 1;
+        line-height: 1.6;
+      }
 
-        /* Collapse Content Styling */
-        .collapse-content {
-            font-size: 0.88rem; border-top: 1px dashed var(--border-color);
-            padding: 1.2rem; margin: 0; background-color: var(--bg-card-content);
-            border-radius: 0 0 5px 5px; color: var(--text-primary);
-        }
-        .collapse-content h6 { font-weight: 600; color: var(--accent-primary); margin: 1rem 0 0.5rem 0; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.5px;}
-        .collapse-content ul { padding-left: 0; margin-bottom: 1rem; list-style-type: none; }
-        .collapse-content li { margin-bottom: 0.6rem; font-size: 0.88rem; line-height: 1.7; padding-left: 1.5em; position: relative; }
-        .collapse-content li::before { /* Neon bullet */
-            content: ""; display: block; position: absolute; left: 0.2em; top: 0.5em;
-            width: 6px; height: 6px; background-color: var(--category-color);
-            border-radius: 50%; box-shadow: 0 0 5px 1px var(--category-color-glow);
-        }
-        /* Style list bullets based on card category */
-        .info-card .collapse-content li::before { color: var(--category-color); box-shadow: 0 0 5px 1px var(--category-color-glow); background-color: var(--category-color); }
+      /* Collapse Content Styling */
+      .collapse-content {
+        font-size: 0.88rem;
+        border-top: 1px dashed var(--border-color);
+        padding: 1.2rem;
+        margin: 0;
+        background-color: var(--bg-card-content);
+        border-radius: 0 0 5px 5px;
+        color: var(--text-primary);
+      }
+      .collapse-content h6 {
+        font-weight: 600;
+        color: var(--accent-primary);
+        margin: 1rem 0 0.5rem 0;
+        font-size: 0.95rem;
+        text-transform: uppercase;
+        letter-spacing: 0.5px;
+      }
+      .collapse-content ul {
+        padding-left: 0;
+        margin-bottom: 1rem;
+        list-style-type: none;
+      }
+      .collapse-content li {
+        margin-bottom: 0.6rem;
+        font-size: 0.88rem;
+        line-height: 1.7;
+        padding-left: 1.5em;
+        position: relative;
+      }
+      .collapse-content li::before {
+        /* Neon bullet */
+        content: "";
+        display: block;
+        position: absolute;
+        left: 0.2em;
+        top: 0.5em;
+        width: 6px;
+        height: 6px;
+        background-color: var(--category-color);
+        border-radius: 50%;
+        box-shadow: 0 0 5px 1px var(--category-color-glow);
+      }
+      /* Style list bullets based on card category */
+      .info-card .collapse-content li::before {
+        color: var(--category-color);
+        box-shadow: 0 0 5px 1px var(--category-color-glow);
+        background-color: var(--category-color);
+      }
 
-        .collapse-content code { font-size: 0.8rem; color: #ffcc99; background-color: #30363d; padding: 0.2em 0.5em; border-radius: 4px; font-family: 'Fira Code', 'Courier New', monospace; border: 1px solid #444;}
-        .collapse-content pre code { display: block; padding: 1em; margin: 1em 0; background-color: #0d1117; border: 1px solid var(--border-color); border-radius: 4px; overflow-x: auto; }
-        .collapse-content dl dt { font-weight: bold; margin-top: 0.7em; color: var(--text-heading); }
-        .collapse-content dl dd { margin-left: 1.5em; margin-bottom: 0.5em; color: var(--text-secondary); }
+      .collapse-content code {
+        font-size: 0.8rem;
+        color: #ffcc99;
+        background-color: #30363d;
+        padding: 0.2em 0.5em;
+        border-radius: 4px;
+        font-family: "Fira Code", "Courier New", monospace;
+        border: 1px solid #444;
+      }
+      .collapse-content pre code {
+        display: block;
+        padding: 1em;
+        margin: 1em 0;
+        background-color: #0d1117;
+        border: 1px solid var(--border-color);
+        border-radius: 4px;
+        overflow-x: auto;
+      }
+      .collapse-content dl dt {
+        font-weight: bold;
+        margin-top: 0.7em;
+        color: var(--text-heading);
+      }
+      .collapse-content dl dd {
+        margin-left: 1.5em;
+        margin-bottom: 0.5em;
+        color: var(--text-secondary);
+      }
 
-        .row > * { margin-bottom: 2rem; }
-        footer { padding: 3rem 1rem 1rem 1rem; font-size: .8rem; color: var(--text-secondary); text-align: center; }
+      .row > * {
+        margin-bottom: 2rem;
+      }
+      footer {
+        padding: 3rem 1rem 1rem 1rem;
+        font-size: 0.8rem;
+        color: var(--text-secondary);
+        text-align: center;
+      }
 
-        /* Details Toggle Button */
-        .details-toggle {
-            font-size: 0.7rem; margin-top: auto; align-self: flex-start;
-            padding: 0.4rem 0.8rem; color: var(--accent-primary);
-            border: 1px solid var(--accent-primary); background-color: transparent;
-            border-radius: 4px; transition: all 0.2s ease;
-            display: inline-flex; align-items: center; gap: 0.4em;
-            text-transform: uppercase; font-weight: 700; letter-spacing: 0.8px;
-            box-shadow: 0 0 5px 0px var(--accent-primary-glow);
-        }
-         .details-toggle:hover { background-color: var(--accent-primary); color: var(--bg-main); border-color: var(--accent-primary); transform: scale(1.05); box-shadow: 0 0 10px 2px var(--accent-primary-glow);}
-         .details-toggle .bi { transition: transform 0.2s ease-in-out; }
-         .details-toggle[aria-expanded="true"] .bi { transform: rotate(180deg); }
+      /* Details Toggle Button */
+      .details-toggle {
+        font-size: 0.7rem;
+        margin-top: auto;
+        align-self: flex-start;
+        padding: 0.4rem 0.8rem;
+        color: var(--accent-primary);
+        border: 1px solid var(--accent-primary);
+        background-color: transparent;
+        border-radius: 4px;
+        transition: all 0.2s ease;
+        display: inline-flex;
+        align-items: center;
+        gap: 0.4em;
+        text-transform: uppercase;
+        font-weight: 700;
+        letter-spacing: 0.8px;
+        box-shadow: 0 0 5px 0px var(--accent-primary-glow);
+      }
+      .details-toggle:hover {
+        background-color: var(--accent-primary);
+        color: var(--bg-main);
+        border-color: var(--accent-primary);
+        transform: scale(1.05);
+        box-shadow: 0 0 10px 2px var(--accent-primary-glow);
+      }
+      .details-toggle .bi {
+        transition: transform 0.2s ease-in-out;
+      }
+      .details-toggle[aria-expanded="true"] .bi {
+        transform: rotate(180deg);
+      }
 
-        /* Terms & Links */
-        .term { font-weight: 600; color: var(--accent-primary); background-color: transparent; border-bottom: 1px dotted var(--accent-primary); padding-bottom: 1px; border-radius: 0; font-family: 'Fira Code', 'Consolas', monospace; filter: drop-shadow(0 0 3px var(--accent-primary-glow)); }
-        .critical { color: var(--critical-color); font-weight: bold; text-shadow: 0 0 6px rgba(248, 81, 73, 0.6); }
-        .rule {
-            color: #ffc1bd; font-weight: 500; display: block; margin: 1em 0;
-            border: 1px solid var(--rule-border-color); border-left-width: 5px;
-            padding: 0.8em 1.2em; background-color: var(--rule-bg-color);
-            border-radius: 4px; font-size: 0.9rem;
-            box-shadow: inset 3px 0 8px rgba(0,0,0,0.2), 0 0 8px var(--rule-bg-color);
-        }
-        .pros::before { content: '[+] '; color: #56d364; font-weight: bold; filter: drop-shadow(0 0 3px var(--btc-glow-operations));}
-        .cons::before { content: '[-] '; color: #ff7b72; font-weight: bold; filter: drop-shadow(0 0 3px var(--btc-glow-hot));}
-        .pros, .cons { display: block; margin-left: 0; padding-left: 0;}
+      /* Terms & Links */
+      .term {
+        font-weight: 600;
+        color: var(--accent-primary);
+        background-color: transparent;
+        border-bottom: 1px dotted var(--accent-primary);
+        padding-bottom: 1px;
+        border-radius: 0;
+        font-family: "Fira Code", "Consolas", monospace;
+        filter: drop-shadow(0 0 3px var(--accent-primary-glow));
+      }
+      .critical {
+        color: var(--critical-color);
+        font-weight: bold;
+        text-shadow: 0 0 6px rgba(248, 81, 73, 0.6);
+      }
+      .rule {
+        color: #ffc1bd;
+        font-weight: 500;
+        display: block;
+        margin: 1em 0;
+        border: 1px solid var(--rule-border-color);
+        border-left-width: 5px;
+        padding: 0.8em 1.2em;
+        background-color: var(--rule-bg-color);
+        border-radius: 4px;
+        font-size: 0.9rem;
+        box-shadow: inset 3px 0 8px rgba(0, 0, 0, 0.2),
+          0 0 8px var(--rule-bg-color);
+      }
+      .pros::before {
+        content: "[+] ";
+        color: #56d364;
+        font-weight: bold;
+        filter: drop-shadow(0 0 3px var(--btc-glow-operations));
+      }
+      .cons::before {
+        content: "[-] ";
+        color: #ff7b72;
+        font-weight: bold;
+        filter: drop-shadow(0 0 3px var(--btc-glow-hot));
+      }
+      .pros,
+      .cons {
+        display: block;
+        margin-left: 0;
+        padding-left: 0;
+      }
 
-        a { color: var(--accent-primary); text-decoration: none; transition: color 0.2s ease;}
-        a:hover { color: #9ecbff; text-decoration: underline; text-shadow: 0 0 5px var(--accent-primary-glow);}
-        .collapse-content a { color: #79c0ff; }
-        .collapse-content a:hover { color: #aedbff; }
+      a {
+        color: var(--accent-primary);
+        text-decoration: none;
+        transition: color 0.2s ease;
+      }
+      a:hover {
+        color: #9ecbff;
+        text-decoration: underline;
+        text-shadow: 0 0 5px var(--accent-primary-glow);
+      }
+      .collapse-content a {
+        color: #79c0ff;
+      }
+      .collapse-content a:hover {
+        color: #aedbff;
+      }
 
-        /* Animated Flow Line Between Rows */
-        .row + .row::before { /* Add line *before* subsequent rows */
-            content: ''; position: absolute; left: 10%; right: 10%; top: -1rem;
-            height: 1px; /* Thinner line */
-            background: linear-gradient(90deg, transparent, var(--accent-primary-glow), var(--accent-primary), var(--accent-primary-glow), transparent);
-            background-size: 200% 1px;
-            opacity: 0.4; animation: flowLineGradient 6s linear infinite;
-            z-index: 1; border-radius: 1px;
-        }
+      /* Animated Flow Line Between Rows */
+      .row + .row::before {
+        /* Add line *before* subsequent rows */
+        content: "";
+        position: absolute;
+        left: 10%;
+        right: 10%;
+        top: -1rem;
+        height: 1px; /* Thinner line */
+        background: linear-gradient(
+          90deg,
+          transparent,
+          var(--accent-primary-glow),
+          var(--accent-primary),
+          var(--accent-primary-glow),
+          transparent
+        );
+        background-size: 200% 1px;
+        opacity: 0.4;
+        animation: flowLineGradient 6s linear infinite;
+        z-index: 1;
+        border-radius: 1px;
+      }
     </style>
-</head>
-<body>
-<header class="page-header">
-    <!-- Updated Title -->
-    <h1 class="display-5">
+  </head>
+  <body>
+    <header class="page-header">
+      <!-- Updated Title -->
+      <h1 class="display-5">
         <i class="bi bi-currency-bitcoin"></i> Bitcoin Wallet Cheatsheet
-    </h1>
-    <!-- Updated Lead Text -->
-    <p class="lead">Your guide to understanding Bitcoin wallets, securing your keys with hardware & cold storage, and practicing safe self-custody.</p>
-</header>
+      </h1>
+      <!-- Updated Lead Text -->
+      <p class="lead">
+        Your guide to understanding Bitcoin wallets, securing your keys with
+        hardware & cold storage, and practicing safe self-custody.
+      </p>
+    </header>
 
-<div class="container" id="main-container">
-
-    <!-- ========================== -->
-    <!-- SECTION 0: What is Bitcoin? (Renumbered) -->
-    <!-- ========================== -->
-    <div class="schema-container cat-concept" data-section-id="section-what-is-bitcoin">
-        <h2 class="section-title" id="section-what-is-bitcoin"><i class="bi bi-lightning-charge"></i> // 0. What is Bitcoin?</h2>
+    <div class="container" id="main-container">
+      <!-- ========================== -->
+      <!-- SECTION 0: What is Bitcoin? (Renumbered) -->
+      <!-- ========================== -->
+      <div
+        class="schema-container cat-concept"
+        data-section-id="section-what-is-bitcoin"
+      >
+        <h2 class="section-title" id="section-what-is-bitcoin">
+          <i class="bi bi-lightning-charge"></i> // 0. What is Bitcoin?
+        </h2>
         <div class="row">
-            <div class="col-md-8 offset-md-2">
-                 <div class="info-card btc-type-intro" id="card-what-is-btc">
-                     <div class="card-body">
-                        <h5 class="text-center"><i class="bi bi-info-circle-fill"></i> Bitcoin :: The Basics</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Bitcoin is a <span class="term">decentralized digital currency</span> you can send directly to anyone (<span class="term">peer-to-peer</span>) without needing a bank. Transactions are recorded on a public digital ledger called the <span class="term">blockchain</span>.</p>
-                             <button class="btn btn-sm details-toggle mx-auto" type="button" data-bs-toggle="collapse" data-bs-target="#collapseWhatIsBtc" aria-expanded="false" aria-controls="collapseWhatIsBtc">
-                                Core Concepts <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                    <div class="collapse collapse-content" id="collapseWhatIsBtc">
-                        <h6>Key Characteristics:</h6>
-                        <ul>
-                            <li><strong>Decentralized:</strong> No single company, country, or person controls it. Run by a global network of computers.</li>
-                            <li><strong>Peer-to-Peer:</strong> Transactions happen directly between users.</li>
-                            <li><strong>Blockchain:</strong> A transparent, shared, and immutable (unchangeable) record of all transactions.</li>
-                            <li><strong>Limited Supply:</strong> Only 21 million bitcoin will ever exist, making it scarce.</li>
-                            <li><strong>Requires Keys:</strong> To own and control Bitcoin, you need special digital keys (explained next).</li>
-                        </ul>
-                         <h6>Learn More:</h6>
-                         <ul>
-                             <li><strong>Official Starting Point:</strong> <a href="https://bitcoin.org/en/getting-started" target="_blank" rel="noopener noreferrer">Bitcoin.org - Getting Started</a></li>
-                             <!-- Added Whitepaper Link -->
-                             <li><strong>Original Vision:</strong> <a href="https://bitcoin.org/bitcoin.pdf" target="_blank" rel="noopener noreferrer"><i class="bi bi-file-earmark-text-fill"></i> Bitcoin Whitepaper</a></li>
-                         </ul>
-                    </div>
-                 </div>
+          <div class="col-md-8 offset-md-2">
+            <div class="info-card btc-type-intro" id="card-what-is-btc">
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-info-circle-fill"></i> Bitcoin :: The Basics
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Bitcoin is a
+                    <span class="term">decentralized digital currency</span> you
+                    can send directly to anyone (<span class="term"
+                      >peer-to-peer</span
+                    >) without needing a bank. Transactions are recorded on a
+                    public digital ledger called the
+                    <span class="term">blockchain</span>.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle mx-auto"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseWhatIsBtc"
+                    aria-expanded="false"
+                    aria-controls="collapseWhatIsBtc"
+                  >
+                    Core Concepts <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseWhatIsBtc">
+                <h6>Key Characteristics:</h6>
+                <ul>
+                  <li>
+                    <strong>Decentralized:</strong> No single company, country,
+                    or person controls it. Run by a global network of computers.
+                  </li>
+                  <li>
+                    <strong>Peer-to-Peer:</strong> Transactions happen directly
+                    between users.
+                  </li>
+                  <li>
+                    <strong>Blockchain:</strong> A transparent, shared, and
+                    immutable (unchangeable) record of all transactions.
+                  </li>
+                  <li>
+                    <strong>Limited Supply:</strong> Only 21 million bitcoin
+                    will ever exist, making it scarce.
+                  </li>
+                  <li>
+                    <strong>Requires Keys:</strong> To own and control Bitcoin,
+                    you need special digital keys (explained next).
+                  </li>
+                </ul>
+                <h6>Learn More:</h6>
+                <ul>
+                  <li>
+                    <strong>Official Starting Point:</strong>
+                    <a
+                      href="https://bitcoin.org/en/getting-started"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Bitcoin.org - Getting Started</a
+                    >
+                  </li>
+                  <!-- Added Whitepaper Link -->
+                  <li>
+                    <strong>Original Vision:</strong>
+                    <a
+                      href="https://bitcoin.org/bitcoin.pdf"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      ><i class="bi bi-file-earmark-text-fill"></i> Bitcoin
+                      Whitepaper</a
+                    >
+                  </li>
+                </ul>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ========================== -->
-    <!-- SECTION I: Introduction (Renumbered) -->
-    <!-- ========================== -->
-    <div class="schema-container cat-concept" data-section-id="section-intro">
-        <h2 class="section-title" id="section-intro"><i class="bi bi-terminal-plus"></i> // I. Understanding Bitcoin Wallets</h2>
+      <!-- ========================== -->
+      <!-- SECTION I: Introduction (Renumbered) -->
+      <!-- ========================== -->
+      <div class="schema-container cat-concept" data-section-id="section-intro">
+        <h2 class="section-title" id="section-intro">
+          <i class="bi bi-terminal-plus"></i> // I. Understanding Bitcoin
+          Wallets
+        </h2>
         <div class="row">
-             <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-concept" id="card-what-is-wallet">
-                     <div class="card-body">
-                         <h5><i class="bi bi-bounding-box-circles"></i> What is a Bitcoin Wallet?</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">It's software or hardware that manages your secret <span class="term">private keys</span>. These keys are needed to access and spend your Bitcoin. <strong class="critical">The wallet itself doesn't store Bitcoin</strong>; it stores the keys that control your funds on the blockchain.</p>
-                              <!-- Simple concept, less need for collapse -->
-                         </div>
-                     </div>
-                 </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-concept" id="card-what-is-wallet">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-bounding-box-circles"></i> What is a Bitcoin
+                  Wallet?
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    It's software or hardware that manages your secret
+                    <span class="term">private keys</span>. These keys are
+                    needed to access and spend your Bitcoin.
+                    <strong class="critical"
+                      >The wallet itself doesn't store Bitcoin</strong
+                    >; it stores the keys that control your funds on the
+                    blockchain.
+                  </p>
+                  <!-- Simple concept, less need for collapse -->
+                </div>
+              </div>
             </div>
-            <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-concept" id="card-self-custody">
-                     <div class="card-body">
-                        <h5 class="text-center"><i class="bi bi-shield-check"></i> Self-Custody :: Your Keys, Your Bitcoin</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">The core principle: <strong class="critical">"Not your keys, not your coins."</strong> This cheatsheet focuses on <span class="term">self-custody</span>, where YOU control your private keys, not a third-party exchange or service. This gives you full control but also full responsibility.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSelfCustody" aria-expanded="false" aria-controls="collapseSelfCustody">
-                                Why Self-Custody? <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseSelfCustody">
-                        <h6>Why Control Your Own Keys?</h6>
-                        <ul>
-                            <li><strong class="pros">Sovereign Control:</strong> Only you can access or move your funds. No third party can freeze or lose them.</li>
-                            <li><strong class="pros">Censorship Resistance:</strong> No one can stop you from sending or receiving transactions.</li>
-                            <li><strong class="cons">Full Responsibility:</strong> If you lose your keys (or seed phrase), your Bitcoin is <strong class="critical">permanently lost</strong>. You are your own bank.</li>
-                        </ul>
-                         <h6>Cheatsheet Scope:</h6>
-                         <p>This guide covers wallet basics, types (Hot/Cold), secure operations, and advanced topics, focusing on tools and practices for effective self-custody.</p>
-                        <h6>Legal Disclaimer:</h6>
-                        <p>Educational information only. Not financial or security advice. Bitcoin technology evolves. <strong class="critical">Do Your Own Research (DYOR) and verify all information independently.</strong></p>
-                    </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-concept" id="card-self-custody">
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-shield-check"></i> Self-Custody :: Your Keys,
+                  Your Bitcoin
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    The core principle:
+                    <strong class="critical"
+                      >"Not your keys, not your coins."</strong
+                    >
+                    This cheatsheet focuses on
+                    <span class="term">self-custody</span>, where YOU control
+                    your private keys, not a third-party exchange or service.
+                    This gives you full control but also full responsibility.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSelfCustody"
+                    aria-expanded="false"
+                    aria-controls="collapseSelfCustody"
+                  >
+                    Why Self-Custody? <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSelfCustody">
+                <h6>Why Control Your Own Keys?</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Sovereign Control:</strong> Only you
+                    can access or move your funds. No third party can freeze or
+                    lose them.
+                  </li>
+                  <li>
+                    <strong class="pros">Censorship Resistance:</strong> No one
+                    can stop you from sending or receiving transactions.
+                  </li>
+                  <li>
+                    <strong class="cons">Full Responsibility:</strong> If you
+                    lose your keys (or seed phrase), your Bitcoin is
+                    <strong class="critical">permanently lost</strong>. You are
+                    your own bank.
+                  </li>
+                </ul>
+                <h6>Cheatsheet Scope:</h6>
+                <p>
+                  This guide covers wallet basics, types (Hot/Cold), secure
+                  operations, and advanced topics, focusing on tools and
+                  practices for effective self-custody.
+                </p>
+                <h6>Legal Disclaimer:</h6>
+                <p>
+                  Educational information only. Not financial or security
+                  advice. Bitcoin technology evolves.
+                  <strong class="critical"
+                    >Do Your Own Research (DYOR) and verify all information
+                    independently.</strong
+                  >
+                </p>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ================================================== -->
-    <!-- SECTION II: Protecting Your Bitcoin (Renumbered) -->
-    <!-- ================================================== -->
-    <div class="schema-container cat-cold" data-section-id="section-protection">
-        <h2 class="section-title" id="section-protection"><i class="bi bi-snow3"></i> // II. Protecting Your Bitcoin: Cold Storage & Hardware Wallets</h2>
+      <!-- ================================================== -->
+      <!-- SECTION II: Protecting Your Bitcoin (Renumbered) -->
+      <!-- ================================================== -->
+      <div
+        class="schema-container cat-cold"
+        data-section-id="section-protection"
+      >
+        <h2 class="section-title" id="section-protection">
+          <i class="bi bi-snow3"></i> // II. Protecting Your Bitcoin: Cold
+          Storage & Hardware Wallets
+        </h2>
         <div class="row">
-            <div class="col-lg-6 col-md-6">
-                <div class="info-card btc-type-hardware" id="card-cold-storage-intro">
-                    <div class="card-body">
-                        <h5><i class="bi bi-shield-shaded"></i> Cold Storage :: Keeping Keys Offline</h5>
-                        <div class="card-content-wrapper">
-                            <p class="summary"><span class="term">Cold Storage</span> means keeping your critical private keys completely offline, isolated from the internet. This dramatically reduces the risk of online theft (hacking, malware).</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseColdStorageIntro" aria-expanded="false" aria-controls="collapseColdStorageIntro">
-                                Why Offline? <i class="bi bi-chevron-down"></i>
-                           </button>
-                        </div>
-                    </div>
-                    <div class="collapse collapse-content" id="collapseColdStorageIntro">
-                        <h6>The Security Advantage:</h6>
-                        <ul>
-                           <li><strong class="pros">Online Threat Immunity:</strong> Hackers cannot access keys that are never connected to the internet.</li>
-                           <li><strong class="pros">Malware Resistance:</strong> Viruses on your computer or phone cannot steal offline keys.</li>
-                           <li><strong class="term">Best Practice:</strong> Considered the most secure way to store significant amounts of Bitcoin.</li>
-                        </ul>
-                    </div>
+          <div class="col-lg-6 col-md-6">
+            <div
+              class="info-card btc-type-hardware"
+              id="card-cold-storage-intro"
+            >
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-shield-shaded"></i> Cold Storage :: Keeping
+                  Keys Offline
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="term">Cold Storage</span> means keeping your
+                    critical private keys completely offline, isolated from the
+                    internet. This dramatically reduces the risk of online theft
+                    (hacking, malware).
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseColdStorageIntro"
+                    aria-expanded="false"
+                    aria-controls="collapseColdStorageIntro"
+                  >
+                    Why Offline? <i class="bi bi-chevron-down"></i>
+                  </button>
                 </div>
+              </div>
+              <div
+                class="collapse collapse-content"
+                id="collapseColdStorageIntro"
+              >
+                <h6>The Security Advantage:</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Online Threat Immunity:</strong>
+                    Hackers cannot access keys that are never connected to the
+                    internet.
+                  </li>
+                  <li>
+                    <strong class="pros">Malware Resistance:</strong> Viruses on
+                    your computer or phone cannot steal offline keys.
+                  </li>
+                  <li>
+                    <strong class="term">Best Practice:</strong> Considered the
+                    most secure way to store significant amounts of Bitcoin.
+                  </li>
+                </ul>
+              </div>
             </div>
-            <div class="col-lg-6 col-md-6">
-                <div class="info-card btc-type-hardware" id="card-hardware-intro">
-                    <div class="card-body">
-                        <h5><i class="bi bi-memory"></i> Hardware Wallets :: The Key to Cold Storage</h5>
-                        <div class="card-content-wrapper">
-                            <p class="summary"><span class="term">Hardware Wallets</span> are small, specialized physical devices designed to keep your private keys secure and offline (<span class="term">cold storage</span>). They sign transactions internally, never exposing keys to your connected computer/phone.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseHardwareIntro" aria-expanded="false" aria-controls="collapseHardwareIntro">
-                                How They Work <i class="bi bi-chevron-down"></i>
-                           </button>
-                        </div>
-                    </div>
-                    <div class="collapse collapse-content" id="collapseHardwareIntro">
-                        <h6>Core Functionality:</h6>
-                        <ul>
-                            <li><strong class="pros">Key Isolation:</strong> Private keys are generated and stored on the device, never leaving it.</li>
-                            <li><strong class="pros">Secure Signing:</strong> Transactions are confirmed on the device's trusted screen and signed internally. Only the signed transaction (safe to share) is sent back to the computer/phone.</li>
-                            <li><strong class="pros">Physical Security:</strong> Protected by PIN codes and often tamper-evident features.</li>
-                            <li><strong class="term">Standard Recommendation:</strong> The most popular and recommended method for achieving secure cold storage for most users.</li>
-                        </ul>
-                        <h6>Common Examples:</h6>
-                        <ul>
-                           <!-- Updated links to point to correct section VIII cards -->
-                           <li><a href="#card-compare-trezor">Trezor</a>, <a href="#card-compare-coldcard">Coldcard</a>, <a href="#card-compare-ledger">Ledger</a>, <a href="#card-compare-bitbox">BitBox02</a> (More details in Section VIII).</li>
-                        </ul>
-                    </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-hardware" id="card-hardware-intro">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-memory"></i> Hardware Wallets :: The Key to
+                  Cold Storage
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="term">Hardware Wallets</span> are small,
+                    specialized physical devices designed to keep your private
+                    keys secure and offline (<span class="term"
+                      >cold storage</span
+                    >). They sign transactions internally, never exposing keys
+                    to your connected computer/phone.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseHardwareIntro"
+                    aria-expanded="false"
+                    aria-controls="collapseHardwareIntro"
+                  >
+                    How They Work <i class="bi bi-chevron-down"></i>
+                  </button>
                 </div>
-           </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
-
+              </div>
+              <div class="collapse collapse-content" id="collapseHardwareIntro">
+                <h6>Core Functionality:</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Key Isolation:</strong> Private keys
+                    are generated and stored on the device, never leaving it.
+                  </li>
+                  <li>
+                    <strong class="pros">Secure Signing:</strong> Transactions
+                    are confirmed on the device's trusted screen and signed
+                    internally. Only the signed transaction (safe to share) is
+                    sent back to the computer/phone.
+                  </li>
+                  <li>
+                    <strong class="pros">Physical Security:</strong> Protected
+                    by PIN codes and often tamper-evident features.
+                  </li>
+                  <li>
+                    <strong class="term">Standard Recommendation:</strong> The
+                    most popular and recommended method for achieving secure
+                    cold storage for most users.
+                  </li>
+                </ul>
+                <h6>Common Examples:</h6>
+                <ul>
+                  <!-- Updated links to point to correct section VIII cards -->
+                  <li>
+                    <a href="#card-compare-trezor">Trezor</a>,
+                    <a href="#card-compare-coldcard">Coldcard</a>,
+                    <a href="#card-compare-ledger">Ledger</a>,
+                    <a href="#card-compare-bitbox">BitBox02</a> (More details in
+                    Section VIII).
+                  </li>
+                </ul>
+              </div>
+            </div>
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ================================= -->
-    <!-- SECTION III: Wallet Fundamentals (Renumbered) -->
-    <!-- ================================= -->
-    <div class="schema-container cat-concept" data-section-id="section-fundamentals">
-        <h2 class="section-title" id="section-fundamentals"><i class="bi bi-braces-asterisk"></i> // III. Wallet Fundamentals</h2>
+      <!-- ================================= -->
+      <!-- SECTION III: Wallet Fundamentals (Renumbered) -->
+      <!-- ================================= -->
+      <div
+        class="schema-container cat-concept"
+        data-section-id="section-fundamentals"
+      >
+        <h2 class="section-title" id="section-fundamentals">
+          <i class="bi bi-braces-asterisk"></i> // III. Wallet Fundamentals
+        </h2>
         <div class="row">
-            <!-- Keys -->
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-concept" id="card-keys">
-                     <div class="card-body">
-                         <h5><i class="bi bi-key-fill"></i> Private & Public Keys</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><span class="term">Private Key:</span> Your secret password. Used to sign (authorize) transactions. <strong class="critical">Guard it like gold.</strong> <span class="term">Public Key:</span> Derived from the private key. Used to create receiving addresses. Safe to share.</p>
-                             <!-- Simple enough, no collapse needed -->
-                         </div>
-                     </div>
-                 </div>
+          <!-- Keys -->
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-concept" id="card-keys">
+              <div class="card-body">
+                <h5><i class="bi bi-key-fill"></i> Private & Public Keys</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="term">Private Key:</span> Your secret password.
+                    Used to sign (authorize) transactions.
+                    <strong class="critical">Guard it like gold.</strong>
+                    <span class="term">Public Key:</span> Derived from the
+                    private key. Used to create receiving addresses. Safe to
+                    share.
+                  </p>
+                  <!-- Simple enough, no collapse needed -->
+                </div>
+              </div>
             </div>
-             <!-- Addresses -->
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-concept" id="card-addresses">
-                     <div class="card-body">
-                         <h5><i class="bi bi-geo-alt-fill"></i> Bitcoin Addresses</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Identifiers used to receive Bitcoin, derived from your public key. Think of them like email addresses for money. Best practice: use a new address for each transaction.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAddresses" aria-expanded="false" aria-controls="collapseAddresses">
-                                Address Formats <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseAddresses">
-                        <h6>Common Address Formats (Look at the starting characters):</h6>
-                        <ul>
-                            <li><code>Legacy (starts with '1')</code>: Oldest type, highest transaction fees, maximum compatibility.</li>
-                            <li><code>Nested SegWit (starts with '3')</code>: Better fees than Legacy, good compatibility.</li>
-                            <li><code>Native SegWit (starts with 'bc1q')</code>: <strong class="term">Current standard. Lowest fees</strong>, good error detection. Recommended.</li>
-                            <li><code>Taproot (starts with 'bc1p')</code>: Newest type. Offers potential future privacy and efficiency benefits.</li>
-                        </ul>
-                         <p><strong class="term">Privacy Tip: Generate and use a fresh address for every payment you receive.</strong> Most wallets do this automatically.</p>
-                      </div>
-                 </div>
+          </div>
+          <!-- Addresses -->
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-concept" id="card-addresses">
+              <div class="card-body">
+                <h5><i class="bi bi-geo-alt-fill"></i> Bitcoin Addresses</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Identifiers used to receive Bitcoin, derived from your
+                    public key. Think of them like email addresses for money.
+                    Best practice: use a new address for each transaction.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAddresses"
+                    aria-expanded="false"
+                    aria-controls="collapseAddresses"
+                  >
+                    Address Formats <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAddresses">
+                <h6>
+                  Common Address Formats (Look at the starting characters):
+                </h6>
+                <ul>
+                  <li>
+                    <code>Legacy (starts with '1')</code>: Oldest type, highest
+                    transaction fees, maximum compatibility.
+                  </li>
+                  <li>
+                    <code>Nested SegWit (starts with '3')</code>: Better fees
+                    than Legacy, good compatibility.
+                  </li>
+                  <li>
+                    <code>Native SegWit (starts with 'bc1q')</code>:
+                    <strong class="term">Current standard. Lowest fees</strong>,
+                    good error detection. Recommended.
+                  </li>
+                  <li>
+                    <code>Taproot (starts with 'bc1p')</code>: Newest type.
+                    Offers potential future privacy and efficiency benefits.
+                  </li>
+                </ul>
+                <p>
+                  <strong class="term"
+                    >Privacy Tip: Generate and use a fresh address for every
+                    payment you receive.</strong
+                  >
+                  Most wallets do this automatically.
+                </p>
+              </div>
             </div>
-            <!-- Seed Phrase -->
-            <div class="col-lg-4 col-md-12">
-                 <div class="info-card btc-type-concept" id="card-seed-phrase">
-                     <div class="card-body">
-                         <h5><i class="bi bi-journal-code"></i> Seed Phrase :: Master Backup</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">A list of 12 or 24 words that acts as the <strong class="critical">master backup</strong> for your entire wallet. If your device is lost or broken, the seed phrase lets you recover <span class="term">all</span> your keys and funds.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSeed" aria-expanded="false" aria-controls="collapseSeed">
-                                Critical Details <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseSeed">
-                         <h6>Understanding Your Seed Phrase (BIP-39):</h6>
-                         <ul>
-                            <li><strong class="critical">Function:</strong> The ONLY way to restore your wallet if your device fails or is lost. It IS your Bitcoin if the device is gone.</li>
-                            <li><strong>Generation:</strong> Created securely by your wallet (ideally offline by a hardware wallet).</li>
-                            <li><strong>Derivation:</strong> The seed phrase mathematically generates your master private key, which then generates all your individual private keys and addresses (<span class="term">BIP-32</span>).</li>
-                            <li><code>Seed -> Master Key -> All Private Keys -> All Addresses</code></li>
-                            <!-- Updated link to point to correct section VI -->
-                            <li><strong class="critical">Security: Treat your seed phrase with EXTREME care. Anyone who sees it can steal ALL your funds. See Section VI for security rules.</strong></li>
-                            <li><strong>Standard:</strong> Based on the <a href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki" target="_blank" rel="noopener noreferrer">BIP-39</a> standard.</li>
-                         </ul>
-                      </div>
-                 </div>
+          </div>
+          <!-- Seed Phrase -->
+          <div class="col-lg-4 col-md-12">
+            <div class="info-card btc-type-concept" id="card-seed-phrase">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-journal-code"></i> Seed Phrase :: Master
+                  Backup
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    A list of 12 or 24 words that acts as the
+                    <strong class="critical">master backup</strong> for your
+                    entire wallet. If your device is lost or broken, the seed
+                    phrase lets you recover <span class="term">all</span> your
+                    keys and funds.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSeed"
+                    aria-expanded="false"
+                    aria-controls="collapseSeed"
+                  >
+                    Critical Details <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSeed">
+                <h6>Understanding Your Seed Phrase (BIP-39):</h6>
+                <ul>
+                  <li>
+                    <strong class="critical">Function:</strong> The ONLY way to
+                    restore your wallet if your device fails or is lost. It IS
+                    your Bitcoin if the device is gone.
+                  </li>
+                  <li>
+                    <strong>Generation:</strong> Created securely by your wallet
+                    (ideally offline by a hardware wallet).
+                  </li>
+                  <li>
+                    <strong>Derivation:</strong> The seed phrase mathematically
+                    generates your master private key, which then generates all
+                    your individual private keys and addresses (<span
+                      class="term"
+                      >BIP-32</span
+                    >).
+                  </li>
+                  <li>
+                    <code
+                      >Seed -> Master Key -> All Private Keys -> All
+                      Addresses</code
+                    >
+                  </li>
+                  <!-- Updated link to point to correct section VI -->
+                  <li>
+                    <strong class="critical"
+                      >Security: Treat your seed phrase with EXTREME care.
+                      Anyone who sees it can steal ALL your funds. See Section
+                      VI for security rules.</strong
+                    >
+                  </li>
+                  <li>
+                    <strong>Standard:</strong> Based on the
+                    <a
+                      href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >BIP-39</a
+                    >
+                    standard.
+                  </li>
+                </ul>
+              </div>
             </div>
-             <!-- Transactions -->
-             <div class="col-lg-6 col-md-6"> <!-- Adjusted column width for better balance -->
-                 <div class="info-card btc-type-concept" id="card-transactions">
-                     <div class="card-body">
-                         <h5><i class="bi bi-arrows-fullscreen"></i> How Transactions Work</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Sending Bitcoin involves using your private key to sign a message that transfers ownership of specific Bitcoin amounts (<span class="term">UTXOs</span>) to a recipient's address. You include a <span class="term">fee</span> to incentivize miners to include it in the blockchain.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTx" aria-expanded="false" aria-controls="collapseTx">
-                                Transaction Lifecycle <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseTx">
-                         <h6>Transaction Flow:</h6>
-                           <ul>
-                            <li><span class="term">UTXOs (Unspent Transaction Outputs):</span> Think of these as individual "coins" or "notes" of Bitcoin in your wallet. A transaction spends one or more UTXOs.</li>
-                            <li><span class="term">Inputs & Outputs:</span> Your transaction uses your UTXOs as inputs and creates new UTXOs as outputs (one for the recipient, possibly one back to you as change).</li>
-                            <li><span class="term">Transaction Fee (sat/vB):</span> A small amount paid to miners, based on the data size of your transaction (in virtual Bytes) and network congestion. Higher fees usually mean faster confirmation. Measured in <span class="term">satoshis</span> per virtual byte.</li>
-                            <li><span class="term">Mempool:</span> A waiting area where transactions sit before being picked up by miners.</li>
-                            <li><span class="term">Confirmations:</span> When a miner includes your transaction in a block added to the blockchain, it gets one confirmation. More confirmations increase security (6+ is often considered very secure).</li>
-                            <li><strong>Track Transactions:</strong> Use a <span class="term">Block Explorer</span> like <a href="https://mempool.space/" target="_blank" rel="noopener noreferrer">mempool.space</a></li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <!-- Transactions -->
+          <div class="col-lg-6 col-md-6">
+            <!-- Adjusted column width for better balance -->
+            <div class="info-card btc-type-concept" id="card-transactions">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-arrows-fullscreen"></i> How Transactions Work
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Sending Bitcoin involves using your private key to sign a
+                    message that transfers ownership of specific Bitcoin amounts
+                    (<span class="term">UTXOs</span>) to a recipient's address.
+                    You include a <span class="term">fee</span> to incentivize
+                    miners to include it in the blockchain.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseTx"
+                    aria-expanded="false"
+                    aria-controls="collapseTx"
+                  >
+                    Transaction Lifecycle <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseTx">
+                <h6>Transaction Flow:</h6>
+                <ul>
+                  <li>
+                    <span class="term"
+                      >UTXOs (Unspent Transaction Outputs):</span
+                    >
+                    Think of these as individual "coins" or "notes" of Bitcoin
+                    in your wallet. A transaction spends one or more UTXOs.
+                  </li>
+                  <li>
+                    <span class="term">Inputs & Outputs:</span> Your transaction
+                    uses your UTXOs as inputs and creates new UTXOs as outputs
+                    (one for the recipient, possibly one back to you as change).
+                  </li>
+                  <li>
+                    <span class="term">Transaction Fee (sat/vB):</span> A small
+                    amount paid to miners, based on the data size of your
+                    transaction (in virtual Bytes) and network congestion.
+                    Higher fees usually mean faster confirmation. Measured in
+                    <span class="term">satoshis</span> per virtual byte.
+                  </li>
+                  <li>
+                    <span class="term">Mempool:</span> A waiting area where
+                    transactions sit before being picked up by miners.
+                  </li>
+                  <li>
+                    <span class="term">Confirmations:</span> When a miner
+                    includes your transaction in a block added to the
+                    blockchain, it gets one confirmation. More confirmations
+                    increase security (6+ is often considered very secure).
+                  </li>
+                  <li>
+                    <strong>Track Transactions:</strong> Use a
+                    <span class="term">Block Explorer</span> like
+                    <a
+                      href="https://mempool.space/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >mempool.space</a
+                    >
+                  </li>
+                </ul>
+              </div>
             </div>
-             <div class="col-lg-6 col-md-6"> <!-- Adjusted column width for better balance -->
-                 <div class="info-card btc-type-concept" id="card-fee-estimation">
-                     <div class="card-body">
-                         <h5><i class="bi bi-speedometer2"></i> Transaction Fees</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Fees (<span class="term">sat/vB</span>) pay miners to include your transaction. They fluctuate based on network demand. Wallets suggest fees, but manual adjustment is possible for urgency vs. cost savings.</p>
-                             <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseFees" aria-expanded="false" aria-controls="collapseFees">
-                                Fee Strategy <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseFees">
-                         <h6>Understanding Fees:</h6>
-                         <ul>
-                             <li><strong>Unit:</strong> <span class="term">Satoshis per virtual Byte</span> (sat/vB). Higher sat/vB = higher priority for miners.</li>
-                             <li><strong>Estimation:</strong> Check sites like <a href="https://mempool.space/" target="_blank" rel="noopener noreferrer">mempool.space</a> for current rates for low, medium, high priority.</li>
-                             <li><strong>Wallet Defaults:</strong> Most wallets estimate fees, but you can often override them.</li>
-                             <li><strong>Too Low?</strong> Transaction may get stuck (see <a href="#card-adv-fee-bump">Fee Bumping, Section VII</a>).</li>
-                             <li><strong>Too High?</strong> Wasted funds.</li>
-                         </ul>
-                      </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <!-- Adjusted column width for better balance -->
+            <div class="info-card btc-type-concept" id="card-fee-estimation">
+              <div class="card-body">
+                <h5><i class="bi bi-speedometer2"></i> Transaction Fees</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Fees (<span class="term">sat/vB</span>) pay miners to
+                    include your transaction. They fluctuate based on network
+                    demand. Wallets suggest fees, but manual adjustment is
+                    possible for urgency vs. cost savings.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseFees"
+                    aria-expanded="false"
+                    aria-controls="collapseFees"
+                  >
+                    Fee Strategy <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseFees">
+                <h6>Understanding Fees:</h6>
+                <ul>
+                  <li>
+                    <strong>Unit:</strong>
+                    <span class="term">Satoshis per virtual Byte</span>
+                    (sat/vB). Higher sat/vB = higher priority for miners.
+                  </li>
+                  <li>
+                    <strong>Estimation:</strong> Check sites like
+                    <a
+                      href="https://mempool.space/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >mempool.space</a
+                    >
+                    for current rates for low, medium, high priority.
+                  </li>
+                  <li>
+                    <strong>Wallet Defaults:</strong> Most wallets estimate
+                    fees, but you can often override them.
+                  </li>
+                  <li>
+                    <strong>Too Low?</strong> Transaction may get stuck (see
+                    <a href="#card-adv-fee-bump">Fee Bumping, Section VII</a>).
+                  </li>
+                  <li><strong>Too High?</strong> Wasted funds.</li>
+                </ul>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ================================ -->
-    <!-- SECTION IV: Types of Wallets (Renumbered) -->
-    <!-- ================================ -->
-     <div class="schema-container" data-section-id="section-types">
+      <!-- ================================ -->
+      <!-- SECTION IV: Types of Wallets (Renumbered) -->
+      <!-- ================================ -->
+      <div class="schema-container" data-section-id="section-types">
         <!-- Hot Wallets Sub-section -->
-        <h2 class="section-title cat-hot" id="section-hot-wallets"><i class="bi bi-fire"></i> // IV.A Hot Wallets :: ONLINE / CONNECTED</h2>
+        <h2 class="section-title cat-hot" id="section-hot-wallets">
+          <i class="bi bi-fire"></i> // IV.A Hot Wallets :: ONLINE / CONNECTED
+        </h2>
         <div class="row">
-             <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-software" id="card-software">
-                     <div class="card-body">
-                         <h5><i class="bi bi-display"></i> Software Wallets (Desktop/Mobile)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Apps installed on your computer or phone. <strong class="term">Hot Wallets</strong> because your private keys reside on a device connected to the internet. Convenient for frequent use, but <strong class="cons">higher risk</strong> due to online exposure.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSoftware" aria-expanded="false" aria-controls="collapseSoftware">
-                                Types & Risks <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseSoftware">
-                         <h6>Custody Type Matters:</h6>
-                         <ul>
-                            <li><strong class="pros">Non-Custodial:</strong> YOU control the keys/seed phrase. Examples: <a href="#card-compare-app-electrum">Electrum</a>, <a href="#card-compare-app-sparrow">Sparrow</a> (Desktop); <a href="#card-compare-app-bluewallet">BlueWallet</a>, <a href="#card-compare-app-muun">Muun</a> (Mobile). <strong class="term">[Recommended Hot Wallet Type]</strong></li>
-                            <li><strong class="cons">Custodial:</strong> A third party (like an exchange app) holds the keys for you. Easier to start, but you don't truly own the Bitcoin (<span class="term">Counterparty Risk</span>). Not covered in detail here.</li>
-                         </ul>
-                          <h6>Threats to Hot Wallets:</h6>
-                         <ul>
-                            <li><strong class="cons">Vulnerable to:</strong> Malware (viruses, keyloggers), Phishing attacks, OS security holes, physical theft of the device.</li>
-                            <li><strong class="term">Best Use:</strong> Small amounts for daily spending, like cash in your physical wallet. Not for large savings.</li>
-                            <!-- ADDED WARNING -->
-                            <li><strong class="critical">Rule of Thumb: Only keep small, spendable amounts in hot wallets. Use hardware wallets for long-term savings / significant holdings.</strong></li>
-                         </ul>
-                     </div>
-                 </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-software" id="card-software">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-display"></i> Software Wallets
+                  (Desktop/Mobile)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Apps installed on your computer or phone.
+                    <strong class="term">Hot Wallets</strong> because your
+                    private keys reside on a device connected to the internet.
+                    Convenient for frequent use, but
+                    <strong class="cons">higher risk</strong> due to online
+                    exposure.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSoftware"
+                    aria-expanded="false"
+                    aria-controls="collapseSoftware"
+                  >
+                    Types & Risks <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSoftware">
+                <h6>Custody Type Matters:</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Non-Custodial:</strong> YOU control the
+                    keys/seed phrase. Examples:
+                    <a href="#card-compare-app-electrum">Electrum</a>,
+                    <a href="#card-compare-app-sparrow">Sparrow</a> (Desktop);
+                    <a href="#card-compare-app-bluewallet">BlueWallet</a>,
+                    <a href="#card-compare-app-muun">Muun</a> (Mobile).
+                    <strong class="term">[Recommended Hot Wallet Type]</strong>
+                  </li>
+                  <li>
+                    <strong class="cons">Custodial:</strong> A third party (like
+                    an exchange app) holds the keys for you. Easier to start,
+                    but you don't truly own the Bitcoin (<span class="term"
+                      >Counterparty Risk</span
+                    >). Not covered in detail here.
+                  </li>
+                </ul>
+                <h6>Threats to Hot Wallets:</h6>
+                <ul>
+                  <li>
+                    <strong class="cons">Vulnerable to:</strong> Malware
+                    (viruses, keyloggers), Phishing attacks, OS security holes,
+                    physical theft of the device.
+                  </li>
+                  <li>
+                    <strong class="term">Best Use:</strong> Small amounts for
+                    daily spending, like cash in your physical wallet. Not for
+                    large savings.
+                  </li>
+                  <!-- ADDED WARNING -->
+                  <li>
+                    <strong class="critical"
+                      >Rule of Thumb: Only keep small, spendable amounts in hot
+                      wallets. Use hardware wallets for long-term savings /
+                      significant holdings.</strong
+                    >
+                  </li>
+                </ul>
+              </div>
             </div>
-            <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-web" id="card-web">
-                     <div class="card-body">
-                         <h5><i class="bi bi-globe2"></i> Web Wallets</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Accessed through your web browser. Often custodial (run by a website). <strong class="cons">Generally Considered VERY RISKY</strong> due to phishing, malicious browser extensions, and website hacks. Mostly avoided for self-custody.</p>
-                              <!-- Generally discouraged, simple explanation sufficient -->
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-web" id="card-web">
+              <div class="card-body">
+                <h5><i class="bi bi-globe2"></i> Web Wallets</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Accessed through your web browser. Often custodial (run by a
+                    website).
+                    <strong class="cons"
+                      >Generally Considered VERY RISKY</strong
+                    >
+                    due to phishing, malicious browser extensions, and website
+                    hacks. Mostly avoided for self-custody.
+                  </p>
+                  <!-- Generally discouraged, simple explanation sufficient -->
+                </div>
+              </div>
             </div>
-        </div> <!-- /.row -->
+          </div>
+        </div>
+        <!-- /.row -->
 
         <!-- Cold Wallets Sub-section -->
-        <h2 class="section-title cat-cold" id="section-cold-wallets" style="margin-top: 2.5rem;"><i class="bi bi-shield-shaded"></i> // IV.B Cold Wallets :: OFFLINE / ISOLATED</h2>
+        <h2
+          class="section-title cat-cold"
+          id="section-cold-wallets"
+          style="margin-top: 2.5rem"
+        >
+          <i class="bi bi-shield-shaded"></i> // IV.B Cold Wallets :: OFFLINE /
+          ISOLATED
+        </h2>
         <div class="row">
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-hardware" id="card-hardware-detail">
-                     <div class="card-body">
-                         <h5><i class="bi bi-memory"></i> Hardware Wallets (Recap)</h5>
-                         <div class="card-content-wrapper">
-                             <!-- Updated link to point to correct section II -->
-                             <p class="summary">Dedicated physical devices keeping keys offline. <strong class="pros">The gold standard for secure cold storage.</strong> Sign transactions securely without exposing keys. (See Section II for intro).</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseHardwareDetail" aria-expanded="false" aria-controls="collapseHardwareDetail">
-                                Benefits & Tradeoffs <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseHardwareDetail">
-                         <h6>Key Advantages:</h6>
-                         <ul>
-                             <li><strong class="pros">Maximum Security:</strong> Private keys never touch your internet-connected computer/phone.</li>
-                             <li><strong class="pros">Malware/Virus Immune:</strong> Designed to resist threats that affect software wallets.</li>
-                             <li><strong class="pros">Secure Confirmation:</strong> Lets you physically verify transaction details on its screen before approving.</li>
-                         </ul>
-                         <h6>Considerations:</h6>
-                          <ul>
-                             <li><strong class="cons">Cost:</strong> They are physical devices you need to purchase.</li>
-                             <li><strong class="cons">Physical Security:</strong> Needs to be kept safe from physical theft or damage (though the PIN protects it, and the seed phrase is the ultimate backup).</li>
-                             <!-- Updated links to point to correct section VIII cards -->
-                             <li><strong class="term">Examples:</strong> <a href="#card-compare-trezor">Trezor</a>, <a href="#card-compare-coldcard">Coldcard</a>, <a href="#card-compare-ledger">Ledger</a>. (Comparison in Section VIII).</li>
-                         </ul>
-                     </div>
-                 </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-hardware" id="card-hardware-detail">
+              <div class="card-body">
+                <h5><i class="bi bi-memory"></i> Hardware Wallets (Recap)</h5>
+                <div class="card-content-wrapper">
+                  <!-- Updated link to point to correct section II -->
+                  <p class="summary">
+                    Dedicated physical devices keeping keys offline.
+                    <strong class="pros"
+                      >The gold standard for secure cold storage.</strong
+                    >
+                    Sign transactions securely without exposing keys. (See
+                    Section II for intro).
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseHardwareDetail"
+                    aria-expanded="false"
+                    aria-controls="collapseHardwareDetail"
+                  >
+                    Benefits & Tradeoffs <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div
+                class="collapse collapse-content"
+                id="collapseHardwareDetail"
+              >
+                <h6>Key Advantages:</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Maximum Security:</strong> Private keys
+                    never touch your internet-connected computer/phone.
+                  </li>
+                  <li>
+                    <strong class="pros">Malware/Virus Immune:</strong> Designed
+                    to resist threats that affect software wallets.
+                  </li>
+                  <li>
+                    <strong class="pros">Secure Confirmation:</strong> Lets you
+                    physically verify transaction details on its screen before
+                    approving.
+                  </li>
+                </ul>
+                <h6>Considerations:</h6>
+                <ul>
+                  <li>
+                    <strong class="cons">Cost:</strong> They are physical
+                    devices you need to purchase.
+                  </li>
+                  <li>
+                    <strong class="cons">Physical Security:</strong> Needs to be
+                    kept safe from physical theft or damage (though the PIN
+                    protects it, and the seed phrase is the ultimate backup).
+                  </li>
+                  <!-- Updated links to point to correct section VIII cards -->
+                  <li>
+                    <strong class="term">Examples:</strong>
+                    <a href="#card-compare-trezor">Trezor</a>,
+                    <a href="#card-compare-coldcard">Coldcard</a>,
+                    <a href="#card-compare-ledger">Ledger</a>. (Comparison in
+                    Section VIII).
+                  </li>
+                </ul>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-paper" id="card-paper">
-                     <div class="card-body">
-                         <h5><i class="bi bi-journal"></i> Paper Wallets</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Printing your private and public keys directly onto paper. <strong class="cons">Largely Obsolete & High Risk.</strong> Difficult to use safely, easy to damage or lose.</p>
-                              <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapsePaper" aria-expanded="false" aria-controls="collapsePaper">
-                                Why Avoid Them? <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapsePaper">
-                         <h6>Major Drawbacks:</h6>
-                         <ul>
-                             <li><strong class="cons">Spending is Hard & Risky:</strong> Importing the private key into a software wallet exposes it online, defeating the "cold" purpose. Spending partial amounts is complex.</li>
-                             <li><strong class="cons">Fragile:</strong> Easily destroyed by fire, water, tearing, or fading ink.</li>
-                             <li><strong class="cons">Difficult to Generate Securely:</strong> Requires specialized offline procedures to avoid malware during creation.</li>
-                             <li><strong class="cons">Easily Compromised:</strong> If someone sees or copies the paper, funds can be stolen.</li>
-                         </ul>
-                         <p><strong class="critical">Recommendation: Use a hardware wallet instead for much better security and usability.</strong></p>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-paper" id="card-paper">
+              <div class="card-body">
+                <h5><i class="bi bi-journal"></i> Paper Wallets</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Printing your private and public keys directly onto paper.
+                    <strong class="cons">Largely Obsolete & High Risk.</strong>
+                    Difficult to use safely, easy to damage or lose.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapsePaper"
+                    aria-expanded="false"
+                    aria-controls="collapsePaper"
+                  >
+                    Why Avoid Them? <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapsePaper">
+                <h6>Major Drawbacks:</h6>
+                <ul>
+                  <li>
+                    <strong class="cons">Spending is Hard & Risky:</strong>
+                    Importing the private key into a software wallet exposes it
+                    online, defeating the "cold" purpose. Spending partial
+                    amounts is complex.
+                  </li>
+                  <li>
+                    <strong class="cons">Fragile:</strong> Easily destroyed by
+                    fire, water, tearing, or fading ink.
+                  </li>
+                  <li>
+                    <strong class="cons"
+                      >Difficult to Generate Securely:</strong
+                    >
+                    Requires specialized offline procedures to avoid malware
+                    during creation.
+                  </li>
+                  <li>
+                    <strong class="cons">Easily Compromised:</strong> If someone
+                    sees or copies the paper, funds can be stolen.
+                  </li>
+                </ul>
+                <p>
+                  <strong class="critical"
+                    >Recommendation: Use a hardware wallet instead for much
+                    better security and usability.</strong
+                  >
+                </p>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-airgap" id="card-airgap">
-                     <div class="card-body">
-                         <h5><i class="bi bi-exclude"></i> Air-Gapped Setups</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Using a completely offline device (like a dedicated computer or certain hardware wallets) to sign transactions. Data is transferred via mediums like SD cards or QR codes (<span class="term">PSBT</span> standard). <strong class="pros">Maximum network isolation.</strong></p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAirgap" aria-expanded="false" aria-controls="collapseAirgap">
-                                Process & Tradeoffs <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseAirgap">
-                         <h6>How it Works (Simplified):</h6>
-                          <ol>
-                             <li>Create an unsigned transaction (<span class="term">PSBT</span>) on an online "watch-only" wallet.</li>
-                             <li>Transfer the PSBT file/QR code to the offline signing device.</li>
-                             <li>Sign the transaction securely on the offline device.</li>
-                             <li>Transfer the signed PSBT back to the online device.</li>
-                             <li>Broadcast the signed transaction to the Bitcoin network.</li>
-                         </ol>
-                         <h6>Pros & Cons:</h6>
-                         <ul>
-                            <li><strong class="pros">Benefit:</strong> Eliminates almost all risk from online malware or network attacks on the signing keys.</li>
-                            <li><strong class="cons">Drawback:</strong> More complex workflow than standard hardware wallets. Potential (low) risk if the transfer medium (e.g., SD card) is compromised, though PSBTs mitigate this somewhat.</li>
-                         </ul>
-                         <!-- Updated links to point to correct section VIII cards -->
-                         <p>Often used for very high security needs. Hardware wallets like <a href="#card-compare-coldcard">Coldcard</a> or DIY options like <a href="#card-compare-seedsigner">Seedsigner</a> specialize in this.</p>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-airgap" id="card-airgap">
+              <div class="card-body">
+                <h5><i class="bi bi-exclude"></i> Air-Gapped Setups</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Using a completely offline device (like a dedicated computer
+                    or certain hardware wallets) to sign transactions. Data is
+                    transferred via mediums like SD cards or QR codes (<span
+                      class="term"
+                      >PSBT</span
+                    >
+                    standard).
+                    <strong class="pros">Maximum network isolation.</strong>
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAirgap"
+                    aria-expanded="false"
+                    aria-controls="collapseAirgap"
+                  >
+                    Process & Tradeoffs <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAirgap">
+                <h6>How it Works (Simplified):</h6>
+                <ol>
+                  <li>
+                    Create an unsigned transaction (<span class="term"
+                      >PSBT</span
+                    >) on an online "watch-only" wallet.
+                  </li>
+                  <li>
+                    Transfer the PSBT file/QR code to the offline signing
+                    device.
+                  </li>
+                  <li>Sign the transaction securely on the offline device.</li>
+                  <li>Transfer the signed PSBT back to the online device.</li>
+                  <li>
+                    Broadcast the signed transaction to the Bitcoin network.
+                  </li>
+                </ol>
+                <h6>Pros & Cons:</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Benefit:</strong> Eliminates almost all
+                    risk from online malware or network attacks on the signing
+                    keys.
+                  </li>
+                  <li>
+                    <strong class="cons">Drawback:</strong> More complex
+                    workflow than standard hardware wallets. Potential (low)
+                    risk if the transfer medium (e.g., SD card) is compromised,
+                    though PSBTs mitigate this somewhat.
+                  </li>
+                </ul>
+                <!-- Updated links to point to correct section VIII cards -->
+                <p>
+                  Often used for very high security needs. Hardware wallets like
+                  <a href="#card-compare-coldcard">Coldcard</a> or DIY options
+                  like
+                  <a href="#card-compare-seedsigner">Seedsigner</a> specialize
+                  in this.
+                </p>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-
-    <!-- ============================== -->
-    <!-- SECTION V: Core Operations (Renumbered) -->
-    <!-- ============================== -->
-    <div class="schema-container cat-operations" data-section-id="section-operations">
-        <h2 class="section-title" id="section-operations"><i class="bi bi-gear-wide-connected"></i> // V. Core Wallet Operations</h2>
+      <!-- ============================== -->
+      <!-- SECTION V: Core Operations (Renumbered) -->
+      <!-- ============================== -->
+      <div
+        class="schema-container cat-operations"
+        data-section-id="section-operations"
+      >
+        <h2 class="section-title" id="section-operations">
+          <i class="bi bi-gear-wide-connected"></i> // V. Core Wallet Operations
+        </h2>
         <div class="row">
-             <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-operation" id="card-op-setup">
-                     <div class="card-body">
-                         <h5><i class="bi bi-motherboard-fill"></i> Wallet Setup & Backup</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Generate your seed phrase securely (<strong class="term">best done on a hardware wallet</strong>). <strong class="critical">Write down the seed phrase accurately. Store it offline & safely. VERIFY your backup.</strong> Set a strong device PIN.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOpSetup" aria-expanded="false" aria-controls="collapseOpSetup">
-                                Setup Checklist <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseOpSetup">
-                         <h6>Initialization Checklist:</h6>
-                         <ol>
-                             <li><strong>Hardware Wallet Prep:</strong> Verify device integrity (tamper seals), install official firmware if needed.</li>
-                             <li><strong>Seed Generation:</strong> Let the wallet generate a new seed phrase for you.</li>
-                             <li><strong class="critical">Seed Phrase Backup:</strong>
-                                <ul>
-                                    <li>Write words down CLEARLY and IN ORDER. Double-check spelling.</li>
-                                     <!-- Updated link to point to correct section VI -->
-                                    <li>Store OFFLINE ONLY. <strong class="term">Metal backups (steel plates)</strong> resist fire/water. See Section VI.</li>
-                                    <li><strong class="critical">NEVER store digitally (photo, file, password manager).</strong></li>
-                                </ul>
-                             </li>
-                             <li><strong class="critical">Backup Verification:</strong> Use the wallet's function to confirm your written backup is correct *before sending any funds to the wallet*.</li>
-                             <li><strong>Set Strong PIN/Password:</strong> Protects the device itself.</li>
-                              <!-- Updated link to point to correct section VII -->
-                             <li><strong>(Advanced) Passphrase:</strong> Consider adding a BIP-39 Passphrase later for extra security (see Section VII).</li>
-                         </ol>
-                     </div>
-                 </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-operation" id="card-op-setup">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-motherboard-fill"></i> Wallet Setup & Backup
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Generate your seed phrase securely (<strong class="term"
+                      >best done on a hardware wallet</strong
+                    >).
+                    <strong class="critical"
+                      >Write down the seed phrase accurately. Store it offline &
+                      safely. VERIFY your backup.</strong
+                    >
+                    Set a strong device PIN.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseOpSetup"
+                    aria-expanded="false"
+                    aria-controls="collapseOpSetup"
+                  >
+                    Setup Checklist <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseOpSetup">
+                <h6>Initialization Checklist:</h6>
+                <ol>
+                  <li>
+                    <strong>Hardware Wallet Prep:</strong> Verify device
+                    integrity (tamper seals), install official firmware if
+                    needed.
+                  </li>
+                  <li>
+                    <strong>Seed Generation:</strong> Let the wallet generate a
+                    new seed phrase for you.
+                  </li>
+                  <li>
+                    <strong class="critical">Seed Phrase Backup:</strong>
+                    <ul>
+                      <li>
+                        Write words down CLEARLY and IN ORDER. Double-check
+                        spelling.
+                      </li>
+                      <!-- Updated link to point to correct section VI -->
+                      <li>
+                        Store OFFLINE ONLY.
+                        <strong class="term"
+                          >Metal backups (steel plates)</strong
+                        >
+                        resist fire/water. See Section VI.
+                      </li>
+                      <li>
+                        <strong class="critical"
+                          >NEVER store digitally (photo, file, password
+                          manager).</strong
+                        >
+                      </li>
+                    </ul>
+                  </li>
+                  <li>
+                    <strong class="critical">Backup Verification:</strong> Use
+                    the wallet's function to confirm your written backup is
+                    correct *before sending any funds to the wallet*.
+                  </li>
+                  <li>
+                    <strong>Set Strong PIN/Password:</strong> Protects the
+                    device itself.
+                  </li>
+                  <!-- Updated link to point to correct section VII -->
+                  <li>
+                    <strong>(Advanced) Passphrase:</strong> Consider adding a
+                    BIP-39 Passphrase later for extra security (see Section
+                    VII).
+                  </li>
+                </ol>
+              </div>
             </div>
-             <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-operation" id="card-op-receive">
-                     <div class="card-body">
-                         <h5><i class="bi bi-download"></i> Receiving Bitcoin</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Generate a fresh receiving address in your wallet. <strong class="critical">If using a hardware wallet, ALWAYS verify the address shown on your computer/phone matches the address shown on the hardware wallet's trusted screen.</strong> Share the verified address/QR code.</p>
-                             <!-- Simple operation, less need for collapse -->
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-operation" id="card-op-receive">
+              <div class="card-body">
+                <h5><i class="bi bi-download"></i> Receiving Bitcoin</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Generate a fresh receiving address in your wallet.
+                    <strong class="critical"
+                      >If using a hardware wallet, ALWAYS verify the address
+                      shown on your computer/phone matches the address shown on
+                      the hardware wallet's trusted screen.</strong
+                    >
+                    Share the verified address/QR code.
+                  </p>
+                  <!-- Simple operation, less need for collapse -->
+                </div>
+              </div>
             </div>
-            <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-operation" id="card-op-send">
-                     <div class="card-body">
-                         <h5><i class="bi bi-upload"></i> Sending Bitcoin</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Enter the recipient's address (<strong class="critical">DOUBLE/TRIPLE CHECK IT CAREFULLY</strong>). Enter the amount. Set an appropriate transaction <span class="term">fee (sat/vB)</span>. <strong class="critical">Confirm the address and amount on your HARDWARE WALLET SCREEN before approving.</strong></p>
-                             <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOpSend" aria-expanded="false" aria-controls="collapseOpSend">
-                                Sending Checklist <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseOpSend">
-                         <h6>Sending Checklist:</h6>
-                         <ol>
-                             <li><strong>Recipient Address:</strong> Paste or scan the address. <strong class="critical">Visually verify the first few and last few characters match the intended address.</strong> Beware of clipboard malware!</li>
-                             <li><strong>Amount:</strong> Enter the correct amount of Bitcoin to send.</li>
-                             <li><strong>Fee Setting:</strong> Check current network conditions (e.g., on <a href="https://mempool.space/" target="_blank" rel="noopener noreferrer">mempool.space</a>) to choose a fee rate (<span class="term">sat/vB</span>) that matches your urgency. Higher fee = faster confirmation.</li>
-                             <li><strong>Review on Software:</strong> Check all details on your computer/phone screen.</li>
-                             <li><strong class="critical">Hardware Wallet Confirmation:</strong> This is vital! Carefully check that the recipient address and amount shown ON THE HARDWARE WALLET'S SCREEN are correct before pressing the button(s) to sign/approve. This defeats clipboard hijacking malware.</li>
-                             <li><strong>Authorize & Broadcast:</strong> Approve the signing on the hardware wallet. The software wallet will then broadcast the signed transaction.</li>
-                         </ol>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-operation" id="card-op-send">
+              <div class="card-body">
+                <h5><i class="bi bi-upload"></i> Sending Bitcoin</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Enter the recipient's address (<strong class="critical"
+                      >DOUBLE/TRIPLE CHECK IT CAREFULLY</strong
+                    >). Enter the amount. Set an appropriate transaction
+                    <span class="term">fee (sat/vB)</span>.
+                    <strong class="critical"
+                      >Confirm the address and amount on your HARDWARE WALLET
+                      SCREEN before approving.</strong
+                    >
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseOpSend"
+                    aria-expanded="false"
+                    aria-controls="collapseOpSend"
+                  >
+                    Sending Checklist <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseOpSend">
+                <h6>Sending Checklist:</h6>
+                <ol>
+                  <li>
+                    <strong>Recipient Address:</strong> Paste or scan the
+                    address.
+                    <strong class="critical"
+                      >Visually verify the first few and last few characters
+                      match the intended address.</strong
+                    >
+                    Beware of clipboard malware!
+                  </li>
+                  <li>
+                    <strong>Amount:</strong> Enter the correct amount of Bitcoin
+                    to send.
+                  </li>
+                  <li>
+                    <strong>Fee Setting:</strong> Check current network
+                    conditions (e.g., on
+                    <a
+                      href="https://mempool.space/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >mempool.space</a
+                    >) to choose a fee rate (<span class="term">sat/vB</span>)
+                    that matches your urgency. Higher fee = faster confirmation.
+                  </li>
+                  <li>
+                    <strong>Review on Software:</strong> Check all details on
+                    your computer/phone screen.
+                  </li>
+                  <li>
+                    <strong class="critical"
+                      >Hardware Wallet Confirmation:</strong
+                    >
+                    This is vital! Carefully check that the recipient address
+                    and amount shown ON THE HARDWARE WALLET'S SCREEN are correct
+                    before pressing the button(s) to sign/approve. This defeats
+                    clipboard hijacking malware.
+                  </li>
+                  <li>
+                    <strong>Authorize & Broadcast:</strong> Approve the signing
+                    on the hardware wallet. The software wallet will then
+                    broadcast the signed transaction.
+                  </li>
+                </ol>
+              </div>
             </div>
-             <div class="col-lg-6 col-md-6">
-                 <div class="info-card btc-type-operation" id="card-op-check">
-                     <div class="card-body">
-                         <h5><i class="bi bi-search"></i> Checking Balance & History</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Your wallet software shows your balance and transaction history. You can also use a public <span class="term">block explorer</span> (like <a href="https://mempool.space/" target="_blank" rel="noopener noreferrer">mempool.space</a>) by entering your <span class="term">addresses</span> (not keys!) but be aware this links your addresses publicly.</p>
-                              <!-- Simple operation, less need for collapse -->
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-6">
+            <div class="info-card btc-type-operation" id="card-op-check">
+              <div class="card-body">
+                <h5><i class="bi bi-search"></i> Checking Balance & History</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Your wallet software shows your balance and transaction
+                    history. You can also use a public
+                    <span class="term">block explorer</span> (like
+                    <a
+                      href="https://mempool.space/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >mempool.space</a
+                    >) by entering your <span class="term">addresses</span> (not
+                    keys!) but be aware this links your addresses publicly.
+                  </p>
+                  <!-- Simple operation, less need for collapse -->
+                </div>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-
-    <!-- ================================== -->
-    <!-- SECTION VI: Security Best Practices (Renumbered) -->
-    <!-- ================================== -->
-    <div class="schema-container cat-security" data-section-id="section-security">
-        <h2 class="section-title" id="section-security"><i class="bi bi-fingerprint"></i> // VI. Security Best Practices (OPSEC)</h2>
+      <!-- ================================== -->
+      <!-- SECTION VI: Security Best Practices (Renumbered) -->
+      <!-- ================================== -->
+      <div
+        class="schema-container cat-security"
+        data-section-id="section-security"
+      >
+        <h2 class="section-title" id="section-security">
+          <i class="bi bi-fingerprint"></i> // VI. Security Best Practices
+          (OPSEC)
+        </h2>
         <div class="row">
-            <div class="col-lg-6 col-md-12">
-                 <div class="info-card btc-type-security" id="card-sec-seed">
-                     <div class="card-body">
-                         <h5><i class="bi bi-shield-lock-fill"></i> Seed Phrase Security :: Rule #1</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><strong class="critical">[MOST IMPORTANT RULE] Your 12/24 words ARE your Bitcoin backup. Protect them above all else.</strong> Any compromise (digital or physical) means likely TOTAL LOSS.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSecSeed" aria-expanded="false" aria-controls="collapseSecSeed">
-                                Unbreakable Rules <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseSecSeed">
-                         <strong class="rule">Rule 1: NEVER Store Digitally. No photos, no typing into computers/phones, no cloud storage, no password managers, no emails/chats. Assume ALL online devices can be compromised.</strong>
-                         <strong class="rule">Rule 2: NEVER Share Your Seed. No website, app, or "support agent" ever needs your seed phrase. Anyone asking is a <strong class="critical">SCAMMER</strong> trying to steal your funds.</strong>
-                         <strong class="rule">Rule 3: BACKUP Physically & Securely. Use durable materials (steel recommended), verify accuracy, store securely offline (hidden, safe), consider redundancy (multiple locations).</strong>
-                         <h6>Secure Storage Strategies:</h6>
-                         <ul>
-                             <li><span class="pros">Recommended:</span> Verified accurate copy on <strong class="term">metal plates</strong> (fire/water/corrosion resistant like <a href="https://seedplate.com/" target="_blank" rel="noopener noreferrer">SeedPlate</a>, <a href="https://cryptosteel.com/" target="_blank" rel="noopener noreferrer">Cryptosteel</a>). Store in multiple secure, non-obvious physical locations (e.g., home safe, trusted relative's safe, bank deposit box - weigh risks of each).</li>
-                             <li><span class="cons">Avoid:</span> Plain paper (easily damaged/destroyed), easy-to-find locations, storing all backups in one place (single point of failure).</li>
-                              <!-- Updated link to point to correct section VII -->
-                             <li><span class="term">Consider:</span> Test your backup/recovery plan periodically with a small amount or on Testnet (See Section VII).</li>
-                         </ul>
-                     </div>
-                 </div>
+          <div class="col-lg-6 col-md-12">
+            <div class="info-card btc-type-security" id="card-sec-seed">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-shield-lock-fill"></i> Seed Phrase Security ::
+                  Rule #1
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <strong class="critical"
+                      >[MOST IMPORTANT RULE] Your 12/24 words ARE your Bitcoin
+                      backup. Protect them above all else.</strong
+                    >
+                    Any compromise (digital or physical) means likely TOTAL
+                    LOSS.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSecSeed"
+                    aria-expanded="false"
+                    aria-controls="collapseSecSeed"
+                  >
+                    Unbreakable Rules <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSecSeed">
+                <strong class="rule"
+                  >Rule 1: NEVER Store Digitally. No photos, no typing into
+                  computers/phones, no cloud storage, no password managers, no
+                  emails/chats. Assume ALL online devices can be
+                  compromised.</strong
+                >
+                <strong class="rule"
+                  >Rule 2: NEVER Share Your Seed. No website, app, or "support
+                  agent" ever needs your seed phrase. Anyone asking is a
+                  <strong class="critical">SCAMMER</strong> trying to steal your
+                  funds.</strong
+                >
+                <strong class="rule"
+                  >Rule 3: BACKUP Physically & Securely. Use durable materials
+                  (steel recommended), verify accuracy, store securely offline
+                  (hidden, safe), consider redundancy (multiple
+                  locations).</strong
+                >
+                <h6>Secure Storage Strategies:</h6>
+                <ul>
+                  <li>
+                    <span class="pros">Recommended:</span> Verified accurate
+                    copy on
+                    <strong class="term">metal plates</strong>
+                    (fire/water/corrosion resistant like
+                    <a
+                      href="https://seedplate.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >SeedPlate</a
+                    >,
+                    <a
+                      href="https://cryptosteel.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Cryptosteel</a
+                    >). Store in multiple secure, non-obvious physical locations
+                    (e.g., home safe, trusted relative's safe, bank deposit box
+                    - weigh risks of each).
+                  </li>
+                  <li>
+                    <span class="cons">Avoid:</span> Plain paper (easily
+                    damaged/destroyed), easy-to-find locations, storing all
+                    backups in one place (single point of failure).
+                  </li>
+                  <!-- Updated link to point to correct section VII -->
+                  <li>
+                    <span class="term">Consider:</span> Test your
+                    backup/recovery plan periodically with a small amount or on
+                    Testnet (See Section VII).
+                  </li>
+                </ul>
+              </div>
             </div>
-            <div class="col-lg-6 col-md-12">
-                 <div class="info-card btc-type-security" id="card-sec-device">
-                     <div class="card-body">
-                         <h5><i class="bi bi-cpu-fill"></i> Hardware Wallet Security</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Buy hardware wallets <strong class="term">directly from the manufacturer</strong> or authorized resellers. Use a strong PIN. <strong class="critical">ALWAYS verify transaction details (address, amount) on the device's trusted screen before confirming.</strong> Keep firmware updated cautiously.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSecDevice" aria-expanded="false" aria-controls="collapseSecDevice">
-                                Device Procedures <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseSecDevice">
-                         <h6>Hardware Wallet Best Practices:</h6>
-                         <ul>
-                             <li><strong>Source Securely:</strong> Buy <strong class="term">directly from the vendor</strong> to avoid tampering during shipping (supply chain attack). Check tamper-evident seals upon arrival.</li>
-                             <li><strong>Strong PIN:</strong> Use a non-obvious PIN (more than 4 digits if possible). This protects against casual physical access.</li>
-                              <!-- Updated link to point to correct section VII -->
-                             <li><strong>(Optional) Passphrase:</strong> Understand how the BIP-39 Passphrase works (Section VII) before using it. It adds security but also risk if forgotten.</li>
-                             <li><strong class="critical">Trusted Display Verification:</strong> MANDATORY for every Send/Receive operation. It's your defense against malware on your computer/phone trying to trick you into sending funds to the wrong address.</li>
-                             <li><strong>Firmware Updates:</strong> Update only when necessary, using official instructions. Ensure your seed phrase backup is accessible *before* updating. Verify update authenticity.</li>
-                             <li><strong>Physical Protection:</strong> Keep the device safe from theft or prolonged unauthorized access ("Evil Maid Attack" where someone tampers with it).</li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-12">
+            <div class="info-card btc-type-security" id="card-sec-device">
+              <div class="card-body">
+                <h5><i class="bi bi-cpu-fill"></i> Hardware Wallet Security</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Buy hardware wallets
+                    <strong class="term">directly from the manufacturer</strong>
+                    or authorized resellers. Use a strong PIN.
+                    <strong class="critical"
+                      >ALWAYS verify transaction details (address, amount) on
+                      the device's trusted screen before confirming.</strong
+                    >
+                    Keep firmware updated cautiously.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSecDevice"
+                    aria-expanded="false"
+                    aria-controls="collapseSecDevice"
+                  >
+                    Device Procedures <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSecDevice">
+                <h6>Hardware Wallet Best Practices:</h6>
+                <ul>
+                  <li>
+                    <strong>Source Securely:</strong> Buy
+                    <strong class="term">directly from the vendor</strong> to
+                    avoid tampering during shipping (supply chain attack). Check
+                    tamper-evident seals upon arrival.
+                  </li>
+                  <li>
+                    <strong>Strong PIN:</strong> Use a non-obvious PIN (more
+                    than 4 digits if possible). This protects against casual
+                    physical access.
+                  </li>
+                  <!-- Updated link to point to correct section VII -->
+                  <li>
+                    <strong>(Optional) Passphrase:</strong> Understand how the
+                    BIP-39 Passphrase works (Section VII) before using it. It
+                    adds security but also risk if forgotten.
+                  </li>
+                  <li>
+                    <strong class="critical"
+                      >Trusted Display Verification:</strong
+                    >
+                    MANDATORY for every Send/Receive operation. It's your
+                    defense against malware on your computer/phone trying to
+                    trick you into sending funds to the wrong address.
+                  </li>
+                  <li>
+                    <strong>Firmware Updates:</strong> Update only when
+                    necessary, using official instructions. Ensure your seed
+                    phrase backup is accessible *before* updating. Verify update
+                    authenticity.
+                  </li>
+                  <li>
+                    <strong>Physical Protection:</strong> Keep the device safe
+                    from theft or prolonged unauthorized access ("Evil Maid
+                    Attack" where someone tampers with it).
+                  </li>
+                </ul>
+              </div>
             </div>
-             <div class="col-lg-6 col-md-12">
-                 <div class="info-card btc-type-security" id="card-sec-sw-network">
-                     <div class="card-body">
-                         <h5><i class="bi bi-broadcast-pin"></i> Computer & Network Security</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Use reputable wallet software from official sources. Keep your OS and security software updated. Be extremely vigilant against <span class="term">phishing</span> scams. Avoid using public/untrusted Wi-Fi for sensitive operations.</p>
-                             <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSecSw" aria-expanded="false" aria-controls="collapseSecSw">
-                                Digital Hygiene <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseSecSw">
-                         <h6>Protecting Your Digital Environment:</h6>
-                         <ul>
-                             <li><strong>Software Source:</strong> Download wallet software ONLY from official developer websites. Verify digital signatures if possible. Prefer well-known, open-source options when using software wallets.</li>
-                             <li><strong>System Health:</strong> Keep your operating system (Windows, macOS, Linux) and anti-malware software up-to-date.</li>
-                             <li><strong>Phishing Awareness:</strong> Be skeptical of emails, messages, links, or apps asking for wallet details, seed phrases, or urging you to connect your wallet. Verify requests through official channels. <strong class="critical">Never enter your seed phrase online or into any software except during wallet recovery.</strong></li>
-                             <li><strong>Network Safety:</strong> Avoid connecting hardware wallets or performing sensitive actions (like seed recovery) on public Wi-Fi networks. Consider using a VPN.</li>
-                             <li><strong class="critical">Clipboard Malware:</strong> Malware can secretly change copied Bitcoin addresses. ALWAYS double-check pasted addresses visually AND confirm on your hardware wallet's screen.</li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-12">
+            <div class="info-card btc-type-security" id="card-sec-sw-network">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-broadcast-pin"></i> Computer & Network
+                  Security
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Use reputable wallet software from official sources. Keep
+                    your OS and security software updated. Be extremely vigilant
+                    against <span class="term">phishing</span> scams. Avoid
+                    using public/untrusted Wi-Fi for sensitive operations.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSecSw"
+                    aria-expanded="false"
+                    aria-controls="collapseSecSw"
+                  >
+                    Digital Hygiene <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSecSw">
+                <h6>Protecting Your Digital Environment:</h6>
+                <ul>
+                  <li>
+                    <strong>Software Source:</strong> Download wallet software
+                    ONLY from official developer websites. Verify digital
+                    signatures if possible. Prefer well-known, open-source
+                    options when using software wallets.
+                  </li>
+                  <li>
+                    <strong>System Health:</strong> Keep your operating system
+                    (Windows, macOS, Linux) and anti-malware software
+                    up-to-date.
+                  </li>
+                  <li>
+                    <strong>Phishing Awareness:</strong> Be skeptical of emails,
+                    messages, links, or apps asking for wallet details, seed
+                    phrases, or urging you to connect your wallet. Verify
+                    requests through official channels.
+                    <strong class="critical"
+                      >Never enter your seed phrase online or into any software
+                      except during wallet recovery.</strong
+                    >
+                  </li>
+                  <li>
+                    <strong>Network Safety:</strong> Avoid connecting hardware
+                    wallets or performing sensitive actions (like seed recovery)
+                    on public Wi-Fi networks. Consider using a VPN.
+                  </li>
+                  <li>
+                    <strong class="critical">Clipboard Malware:</strong> Malware
+                    can secretly change copied Bitcoin addresses. ALWAYS
+                    double-check pasted addresses visually AND confirm on your
+                    hardware wallet's screen.
+                  </li>
+                </ul>
+              </div>
             </div>
-            <div class="col-lg-6 col-md-12">
-                 <div class="info-card btc-type-security" id="card-sec-backup">
-                     <div class="card-body">
-                         <h5><i class="bi bi-server"></i> Backup, Recovery & Inheritance</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Your <span class="term">seed phrase IS the ultimate backup</span>. The hardware device is replaceable. Have a <strong class="term">tested</strong> recovery plan. Consider how your family could access funds if needed (<span class="term">inheritance planning</span>).</p>
-                             <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSecBackup" aria-expanded="false" aria-controls="collapseSecBackup">
-                                Contingency Plans <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseSecBackup">
-                         <h6>Planning for the Unexpected:</h6>
-                         <ul>
-                            <li><strong>Recovery Practice:</strong> Know the exact steps to restore your wallet using your seed phrase on a new/reset device or compatible software. Practice this (ideally on testnet or with a tiny amount) *before* you actually need it in an emergency.</li>
-                            <li><strong>Inheritance Planning:</strong> CRITICAL step often overlooked. If only you know how to access the funds, they could be lost forever upon your death or incapacitation.
-                                <ul>
-                                     <!-- Updated link to point to correct section VII -->
-                                    <li>Provide clear, secure instructions to a trusted person/executor (without revealing the seed itself prematurely).</li>
-                                    <li>Consider using <span class="term">Multisignature</span> setups (Section VII) to distribute control.</li>
-                                    <li>Explore specialized services (vet carefully!): e.g., <a href="https://keys.casa/bitcoin-inheritance-planning" target="_blank" rel="noopener noreferrer">Casa</a>, <a href="https://unchained.com/inheritance/" target="_blank" rel="noopener noreferrer">Unchained Capital</a>.</li>
-                                </ul>
-                            </li>
-                            <li><strong>Backup Redundancy:</strong> Having multiple secure backups (e.g., two steel plates in different secure locations) protects against loss from a single event (fire, flood, theft).</li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-6 col-md-12">
+            <div class="info-card btc-type-security" id="card-sec-backup">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-server"></i> Backup, Recovery & Inheritance
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Your
+                    <span class="term">seed phrase IS the ultimate backup</span
+                    >. The hardware device is replaceable. Have a
+                    <strong class="term">tested</strong> recovery plan. Consider
+                    how your family could access funds if needed (<span
+                      class="term"
+                      >inheritance planning</span
+                    >).
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseSecBackup"
+                    aria-expanded="false"
+                    aria-controls="collapseSecBackup"
+                  >
+                    Contingency Plans <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseSecBackup">
+                <h6>Planning for the Unexpected:</h6>
+                <ul>
+                  <li>
+                    <strong>Recovery Practice:</strong> Know the exact steps to
+                    restore your wallet using your seed phrase on a new/reset
+                    device or compatible software. Practice this (ideally on
+                    testnet or with a tiny amount) *before* you actually need it
+                    in an emergency.
+                  </li>
+                  <li>
+                    <strong>Inheritance Planning:</strong> CRITICAL step often
+                    overlooked. If only you know how to access the funds, they
+                    could be lost forever upon your death or incapacitation.
+                    <ul>
+                      <!-- Updated link to point to correct section VII -->
+                      <li>
+                        Provide clear, secure instructions to a trusted
+                        person/executor (without revealing the seed itself
+                        prematurely).
+                      </li>
+                      <li>
+                        Consider using
+                        <span class="term">Multisignature</span> setups (Section
+                        VII) to distribute control.
+                      </li>
+                      <li>
+                        Explore specialized services (vet carefully!): e.g.,
+                        <a
+                          href="https://keys.casa/bitcoin-inheritance-planning"
+                          target="_blank"
+                          rel="noopener noreferrer"
+                          >Casa</a
+                        >,
+                        <a
+                          href="https://unchained.com/inheritance/"
+                          target="_blank"
+                          rel="noopener noreferrer"
+                          >Unchained Capital</a
+                        >.
+                      </li>
+                    </ul>
+                  </li>
+                  <li>
+                    <strong>Backup Redundancy:</strong> Having multiple secure
+                    backups (e.g., two steel plates in different secure
+                    locations) protects against loss from a single event (fire,
+                    flood, theft).
+                  </li>
+                </ul>
+              </div>
             </div>
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
-
-
-    <!-- ==================================== -->
-    <!-- SECTION VII: Advanced Features & Techniques (Renumbered) -->
-    <!-- ==================================== -->
-    <div class="schema-container cat-advanced" data-section-id="section-advanced">
-        <h2 class="section-title" id="section-advanced"><i class="bi bi-motherboard"></i> // VII. Advanced Features & Techniques</h2>
+      <!-- ==================================== -->
+      <!-- SECTION VII: Advanced Features & Techniques (Renumbered) -->
+      <!-- ==================================== -->
+      <div
+        class="schema-container cat-advanced"
+        data-section-id="section-advanced"
+      >
+        <h2 class="section-title" id="section-advanced">
+          <i class="bi bi-motherboard"></i> // VII. Advanced Features &
+          Techniques
+        </h2>
         <div class="row">
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-passphrase">
-                     <div class="card-body">
-                         <h5><i class="bi bi-mask"></i> BIP-39 Passphrase ("Hidden Wallet")</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">An optional, user-chosen word or phrase added to your 12/24 word seed. Creates a completely separate, hidden set of keys/addresses. Use with extreme caution.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAdvPassphrase" aria-expanded="false" aria-controls="collapseAdvPassphrase">
-                                Use Cases & Risks <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseAdvPassphrase">
-                         <h6>How it Works:</h6>
-                         <ul>
-                            <li><code>Seed Phrase ONLY = Wallet A</code></li>
-                            <li><code>Seed Phrase + Passphrase 'X' = Wallet B (Hidden)</code></li>
-                            <li><code>Seed Phrase + Passphrase 'Y' = Wallet C (Hidden)</code></li>
-                            <li>The passphrase is never stored on the device.</li>
-                            <li><strong>Use Case:</strong> Plausible deniability (reveal the non-passphrase wallet under duress). Adds security if BOTH seed and passphrase are required.</li>
-                         </ul>
-                          <h6><strong class="critical">CRITICAL RISK:</strong></h6>
-                         <ul>
-                            <li><strong class="cons">If you forget the EXACT passphrase (case-sensitive, spaces count), the funds in that hidden wallet are PERMANENTLY LOST. There is NO recovery.</strong> You MUST back up the passphrase separately and securely from the seed, or memorize it perfectly (very risky).</li>
-                         </ul>
-                     </div>
-                 </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-passphrase">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-mask"></i> BIP-39 Passphrase ("Hidden Wallet")
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    An optional, user-chosen word or phrase added to your 12/24
+                    word seed. Creates a completely separate, hidden set of
+                    keys/addresses. Use with extreme caution.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAdvPassphrase"
+                    aria-expanded="false"
+                    aria-controls="collapseAdvPassphrase"
+                  >
+                    Use Cases & Risks <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAdvPassphrase">
+                <h6>How it Works:</h6>
+                <ul>
+                  <li><code>Seed Phrase ONLY = Wallet A</code></li>
+                  <li>
+                    <code
+                      >Seed Phrase + Passphrase 'X' = Wallet B (Hidden)</code
+                    >
+                  </li>
+                  <li>
+                    <code
+                      >Seed Phrase + Passphrase 'Y' = Wallet C (Hidden)</code
+                    >
+                  </li>
+                  <li>The passphrase is never stored on the device.</li>
+                  <li>
+                    <strong>Use Case:</strong> Plausible deniability (reveal the
+                    non-passphrase wallet under duress). Adds security if BOTH
+                    seed and passphrase are required.
+                  </li>
+                </ul>
+                <h6><strong class="critical">CRITICAL RISK:</strong></h6>
+                <ul>
+                  <li>
+                    <strong class="cons"
+                      >If you forget the EXACT passphrase (case-sensitive,
+                      spaces count), the funds in that hidden wallet are
+                      PERMANENTLY LOST. There is NO recovery.</strong
+                    >
+                    You MUST back up the passphrase separately and securely from
+                    the seed, or memorize it perfectly (very risky).
+                  </li>
+                </ul>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-multisig">
-                     <div class="card-body">
-                         <h5><i class="bi bi-diagram-3-fill"></i> Multisignature (Multisig)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Requires multiple keys (held on different devices/locations) to approve a transaction (e.g., 2-of-3 keys needed). Greatly enhances security and enables shared control.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAdvMultisig" aria-expanded="false" aria-controls="collapseAdvMultisig">
-                                Benefits & Setup <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseAdvMultisig">
-                         <h6>Why Use Multisig?</h6>
-                         <ul>
-                            <li><strong class="pros">Enhanced Security:</strong> An attacker needs to compromise multiple keys/devices/locations, not just one.</li>
-                            <li><strong class="pros">Shared Control:</strong> Good for business funds (multiple partners need to sign) or joint accounts.</li>
-                            <li><strong class="pros">Robust Backup/Inheritance:</strong> Distribute keys among yourself, a safe deposit box, a lawyer, family members, etc., so losing one key doesn't mean losing funds.</li>
-                         </ul>
-                         <h6>Setup:</h6>
-                          <ul>
-                             <!-- Updated links to point to correct section IX cards -->
-                             <li>Requires specialized software (like <a href="#card-compare-app-sparrow">Sparrow Wallet</a>, <a href="https://specter.solutions/" target="_blank" rel="noopener noreferrer">Specter Desktop</a>, <a href="#card-compare-app-nunchuk">Nunchuk</a>) to coordinate multiple hardware wallets.</li>
-                             <li>Uses <span class="term">PSBTs</span> (Partially Signed Bitcoin Transactions) to pass the transaction between signers.</li>
-                             <li>More complex than single-signature wallets.</li>
-                             <li>Resource: <a href="https://sparrowwallet.com/docs/multisig-wallet.html" target="_blank" rel="noopener noreferrer">Sparrow Multisig Guide</a></li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-multisig">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-diagram-3-fill"></i> Multisignature (Multisig)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Requires multiple keys (held on different devices/locations)
+                    to approve a transaction (e.g., 2-of-3 keys needed). Greatly
+                    enhances security and enables shared control.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAdvMultisig"
+                    aria-expanded="false"
+                    aria-controls="collapseAdvMultisig"
+                  >
+                    Benefits & Setup <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAdvMultisig">
+                <h6>Why Use Multisig?</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Enhanced Security:</strong> An attacker
+                    needs to compromise multiple keys/devices/locations, not
+                    just one.
+                  </li>
+                  <li>
+                    <strong class="pros">Shared Control:</strong> Good for
+                    business funds (multiple partners need to sign) or joint
+                    accounts.
+                  </li>
+                  <li>
+                    <strong class="pros">Robust Backup/Inheritance:</strong>
+                    Distribute keys among yourself, a safe deposit box, a
+                    lawyer, family members, etc., so losing one key doesn't mean
+                    losing funds.
+                  </li>
+                </ul>
+                <h6>Setup:</h6>
+                <ul>
+                  <!-- Updated links to point to correct section IX cards -->
+                  <li>
+                    Requires specialized software (like
+                    <a href="#card-compare-app-sparrow">Sparrow Wallet</a>,
+                    <a
+                      href="https://specter.solutions/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Specter Desktop</a
+                    >, <a href="#card-compare-app-nunchuk">Nunchuk</a>) to
+                    coordinate multiple hardware wallets.
+                  </li>
+                  <li>
+                    Uses <span class="term">PSBTs</span> (Partially Signed
+                    Bitcoin Transactions) to pass the transaction between
+                    signers.
+                  </li>
+                  <li>More complex than single-signature wallets.</li>
+                  <li>
+                    Resource:
+                    <a
+                      href="https://sparrowwallet.com/docs/multisig-wallet.html"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Sparrow Multisig Guide</a
+                    >
+                  </li>
+                </ul>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-node">
-                     <div class="card-body">
-                         <h5><i class="bi bi-hdd-network-fill"></i> Using Your Own Full Node</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Connect your wallet software (like Sparrow or Specter) directly to your own <a href="https://bitcoincore.org/" target="_blank" rel="noopener noreferrer">Bitcoin Core</a> full node instead of relying on third-party servers. <strong class="pros">Maximizes privacy and trustlessness.</strong></p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAdvNode" aria-expanded="false" aria-controls="collapseAdvNode">
-                                Why Run a Node? <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseAdvNode">
-                         <h6>Benefits:</h6>
-                         <ul>
-                             <li><strong>Privacy:</strong> Your wallet doesn't broadcast your addresses and transaction history to company servers.</li>
-                             <li><strong>Verification:</strong> Your node independently validates all Bitcoin rules and transactions; you don't trust someone else's node.</li>
-                             <li><strong>Network Support:</strong> Helps strengthen the decentralized Bitcoin network.</li>
-                         </ul>
-                          <h6>Requirements:</h6>
-                         <ul>
-                             <li>Requires dedicated hardware (like a Raspberry Pi or old computer), sufficient internet bandwidth, and storage space.</li>
-                             <li>Easier setup options exist (e.g., <a href="https://umbrel.com/" target="_blank" rel="noopener noreferrer">Umbrel</a>, <a href="https://start9.com/" target="_blank" rel="noopener noreferrer">Start9</a>).</li>
-                             <li>Requires compatible wallet software.</li>
-                             <li>Resource: <a href="https://bitcoin.org/en/full-node#choose-your-node" target="_blank" rel="noopener noreferrer">Node Implementation Options</a></li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-node">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-hdd-network-fill"></i> Using Your Own Full
+                  Node
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Connect your wallet software (like Sparrow or Specter)
+                    directly to your own
+                    <a
+                      href="https://bitcoincore.org/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Bitcoin Core</a
+                    >
+                    full node instead of relying on third-party servers.
+                    <strong class="pros"
+                      >Maximizes privacy and trustlessness.</strong
+                    >
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAdvNode"
+                    aria-expanded="false"
+                    aria-controls="collapseAdvNode"
+                  >
+                    Why Run a Node? <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAdvNode">
+                <h6>Benefits:</h6>
+                <ul>
+                  <li>
+                    <strong>Privacy:</strong> Your wallet doesn't broadcast your
+                    addresses and transaction history to company servers.
+                  </li>
+                  <li>
+                    <strong>Verification:</strong> Your node independently
+                    validates all Bitcoin rules and transactions; you don't
+                    trust someone else's node.
+                  </li>
+                  <li>
+                    <strong>Network Support:</strong> Helps strengthen the
+                    decentralized Bitcoin network.
+                  </li>
+                </ul>
+                <h6>Requirements:</h6>
+                <ul>
+                  <li>
+                    Requires dedicated hardware (like a Raspberry Pi or old
+                    computer), sufficient internet bandwidth, and storage space.
+                  </li>
+                  <li>
+                    Easier setup options exist (e.g.,
+                    <a
+                      href="https://umbrel.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Umbrel</a
+                    >,
+                    <a
+                      href="https://start9.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Start9</a
+                    >).
+                  </li>
+                  <li>Requires compatible wallet software.</li>
+                  <li>
+                    Resource:
+                    <a
+                      href="https://bitcoin.org/en/full-node#choose-your-node"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Node Implementation Options</a
+                    >
+                  </li>
+                </ul>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-coincontrol">
-                     <div class="card-body">
-                         <h5><i class="bi bi-vinyl-fill"></i> Coin Control (UTXO Management)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Manually selecting which specific "chunks" of Bitcoin (<span class="term">UTXOs</span>) are used as inputs when creating a transaction. Useful for advanced privacy and fee management.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAdvCoinControl" aria-expanded="false" aria-controls="collapseAdvCoinControl">
-                                Why Use It? <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseAdvCoinControl">
-                         <h6>Benefits:</h6>
-                          <ul>
-                             <li><strong>Privacy:</strong> Avoids linking UTXOs from different sources together in one transaction, which can reveal information about your holdings. Allows separating funds (e.g., KYC vs non-KYC - *note: advanced topic with limits*).</li>
-                             <li><strong>Fee Management:</strong> Can sometimes help optimize transaction size and cost by choosing specific UTXOs.</li>
-                             <li><strong>Labeling:</strong> Allows you to label UTXOs with their source or purpose for better tracking.</li>
-                         </ul>
-                         <!-- Updated links to point to correct section IX cards -->
-                         <p>Requires wallet software that supports this feature (e.g., <a href="#card-compare-app-electrum">Electrum</a>, <a href="#card-compare-app-sparrow">Sparrow</a>, <a href="https://specter.solutions/" target="_blank" rel="noopener noreferrer">Specter</a>).</p>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-coincontrol">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-vinyl-fill"></i> Coin Control (UTXO
+                  Management)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Manually selecting which specific "chunks" of Bitcoin (<span
+                      class="term"
+                      >UTXOs</span
+                    >) are used as inputs when creating a transaction. Useful
+                    for advanced privacy and fee management.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAdvCoinControl"
+                    aria-expanded="false"
+                    aria-controls="collapseAdvCoinControl"
+                  >
+                    Why Use It? <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div
+                class="collapse collapse-content"
+                id="collapseAdvCoinControl"
+              >
+                <h6>Benefits:</h6>
+                <ul>
+                  <li>
+                    <strong>Privacy:</strong> Avoids linking UTXOs from
+                    different sources together in one transaction, which can
+                    reveal information about your holdings. Allows separating
+                    funds (e.g., KYC vs non-KYC - *note: advanced topic with
+                    limits*).
+                  </li>
+                  <li>
+                    <strong>Fee Management:</strong> Can sometimes help optimize
+                    transaction size and cost by choosing specific UTXOs.
+                  </li>
+                  <li>
+                    <strong>Labeling:</strong> Allows you to label UTXOs with
+                    their source or purpose for better tracking.
+                  </li>
+                </ul>
+                <!-- Updated links to point to correct section IX cards -->
+                <p>
+                  Requires wallet software that supports this feature (e.g.,
+                  <a href="#card-compare-app-electrum">Electrum</a>,
+                  <a href="#card-compare-app-sparrow">Sparrow</a>,
+                  <a
+                    href="https://specter.solutions/"
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    >Specter</a
+                  >).
+                </p>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-psbt">
-                     <div class="card-body">
-                         <h5><i class="bi bi-file-binary-fill"></i> PSBT (Partially Signed Bitcoin Tx)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">A standard format (<a href="https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki" target="_blank" rel="noopener noreferrer">BIP-174</a>) for transactions that are not yet fully signed. Essential for <span class="term">air-gapped</span> and <span class="term">multisig</span> workflows.</p>
-                            <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAdvPsbt" aria-expanded="false" aria-controls="collapseAdvPsbt">
-                                How It's Used <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseAdvPsbt">
-                         <h6>Common Workflows:</h6>
-                         <ul>
-                            <li><strong>Air-Gap Signing:</strong> 1. Create unsigned PSBT online. 2. Move PSBT file/QR to offline signer. 3. Sign PSBT offline. 4. Move signed PSBT back online. 5. Broadcast.</li>
-                            <li><strong>Multisignature Signing:</strong> 1. Create unsigned PSBT. 2. Pass to Signer 1 -> Signs -> Partially Signed PSBT. 3. Pass to Signer 2 -> Signs -> Fully Signed PSBT (if 2-of-2). 4. Broadcast.</li>
-                         </ul>
-                         <p>Facilitates complex signing arrangements without exposing keys online.</p>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-psbt">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-file-binary-fill"></i> PSBT (Partially Signed
+                  Bitcoin Tx)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    A standard format (<a
+                      href="https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >BIP-174</a
+                    >) for transactions that are not yet fully signed. Essential
+                    for <span class="term">air-gapped</span> and
+                    <span class="term">multisig</span> workflows.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAdvPsbt"
+                    aria-expanded="false"
+                    aria-controls="collapseAdvPsbt"
+                  >
+                    How It's Used <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAdvPsbt">
+                <h6>Common Workflows:</h6>
+                <ul>
+                  <li>
+                    <strong>Air-Gap Signing:</strong> 1. Create unsigned PSBT
+                    online. 2. Move PSBT file/QR to offline signer. 3. Sign PSBT
+                    offline. 4. Move signed PSBT back online. 5. Broadcast.
+                  </li>
+                  <li>
+                    <strong>Multisignature Signing:</strong> 1. Create unsigned
+                    PSBT. 2. Pass to Signer 1 -> Signs -> Partially Signed PSBT.
+                    3. Pass to Signer 2 -> Signs -> Fully Signed PSBT (if
+                    2-of-2). 4. Broadcast.
+                  </li>
+                </ul>
+                <p>
+                  Facilitates complex signing arrangements without exposing keys
+                  online.
+                </p>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-fee-bump">
-                     <div class="card-body">
-                         <h5><i class="bi bi-graph-up-arrow"></i> Fee Bumping (RBF / CPFP)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Techniques to speed up a stuck (unconfirmed) transaction by increasing the fee.</p>
-                             <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseFeeBump" aria-expanded="false" aria-controls="collapseFeeBump">
-                                How It Works <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseFeeBump">
-                         <h6>Methods:</h6>
-                         <ul>
-                            <li><span class="term">RBF (Replace-By-Fee):</span> If your wallet enabled RBF (<a href="https://github.com/bitcoin/bips/blob/master/bip-0125.mediawiki" target="_blank" rel="noopener noreferrer">BIP-125</a>) when sending, you can broadcast a *new version* of the same transaction with a higher fee. Miners will prioritize the higher-fee version.</li>
-                            <li><span class="term">CPFP (Child-Pays-For-Parent):</span> If you received a transaction that is stuck, you can spend *that* incoming UTXO (even before it confirms) in a *new* transaction with a very high fee. Miners are incentivized to mine the stuck parent transaction so they can also mine the high-fee child transaction.</li>
-                         </ul>
-                         <p>Requires wallet support for these features.</p>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-fee-bump">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-graph-up-arrow"></i> Fee Bumping (RBF / CPFP)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Techniques to speed up a stuck (unconfirmed) transaction by
+                    increasing the fee.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseFeeBump"
+                    aria-expanded="false"
+                    aria-controls="collapseFeeBump"
+                  >
+                    How It Works <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseFeeBump">
+                <h6>Methods:</h6>
+                <ul>
+                  <li>
+                    <span class="term">RBF (Replace-By-Fee):</span> If your
+                    wallet enabled RBF (<a
+                      href="https://github.com/bitcoin/bips/blob/master/bip-0125.mediawiki"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >BIP-125</a
+                    >) when sending, you can broadcast a *new version* of the
+                    same transaction with a higher fee. Miners will prioritize
+                    the higher-fee version.
+                  </li>
+                  <li>
+                    <span class="term">CPFP (Child-Pays-For-Parent):</span> If
+                    you received a transaction that is stuck, you can spend
+                    *that* incoming UTXO (even before it confirms) in a *new*
+                    transaction with a very high fee. Miners are incentivized to
+                    mine the stuck parent transaction so they can also mine the
+                    high-fee child transaction.
+                  </li>
+                </ul>
+                <p>Requires wallet support for these features.</p>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-shamir">
-                     <div class="card-body">
-                         <h5><i class="bi bi-intersect"></i> Shamir Backup (Seed Splitting)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Splits your seed phrase backup into multiple unique 'shares' (e.g., 3-of-5). You need a certain threshold of shares (e.g., 3 out of the 5) to recover the wallet. Increases redundancy.</p>
-                              <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAdvShamir" aria-expanded="false" aria-controls="collapseAdvShamir">
-                                Pros & Cons <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseAdvShamir">
-                          <h6>How it Helps:</h6>
-                          <ul>
-                            <li><strong class="pros">Redundancy:</strong> You can lose some shares (less than the threshold) and still recover your funds.</li>
-                            <li><strong class="pros">Security:</strong> An attacker needs to find multiple shares (the threshold number) to steal funds, not just one backup.</li>
-                         </ul>
-                         <h6>Considerations:</h6>
-                          <ul>
-                            <li><strong class="cons">Complexity:</strong> More complex to set up and recover than a standard BIP-39 seed phrase.</li>
-                            <li><strong class="cons">Compatibility:</strong> Less widely supported by wallets. Primarily associated with Trezor hardware wallets (<a href="https://github.com/satoshilabs/slips/blob/master/slip-0039.md" target="_blank" rel="noopener noreferrer">SLIP-39 standard</a>).</li>
-                            <li>Still requires careful management of the individual shares.</li>
-                         </ul>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-shamir">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-intersect"></i> Shamir Backup (Seed Splitting)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Splits your seed phrase backup into multiple unique 'shares'
+                    (e.g., 3-of-5). You need a certain threshold of shares
+                    (e.g., 3 out of the 5) to recover the wallet. Increases
+                    redundancy.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAdvShamir"
+                    aria-expanded="false"
+                    aria-controls="collapseAdvShamir"
+                  >
+                    Pros & Cons <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseAdvShamir">
+                <h6>How it Helps:</h6>
+                <ul>
+                  <li>
+                    <strong class="pros">Redundancy:</strong> You can lose some
+                    shares (less than the threshold) and still recover your
+                    funds.
+                  </li>
+                  <li>
+                    <strong class="pros">Security:</strong> An attacker needs to
+                    find multiple shares (the threshold number) to steal funds,
+                    not just one backup.
+                  </li>
+                </ul>
+                <h6>Considerations:</h6>
+                <ul>
+                  <li>
+                    <strong class="cons">Complexity:</strong> More complex to
+                    set up and recover than a standard BIP-39 seed phrase.
+                  </li>
+                  <li>
+                    <strong class="cons">Compatibility:</strong> Less widely
+                    supported by wallets. Primarily associated with Trezor
+                    hardware wallets (<a
+                      href="https://github.com/satoshilabs/slips/blob/master/slip-0039.md"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >SLIP-39 standard</a
+                    >).
+                  </li>
+                  <li>
+                    Still requires careful management of the individual shares.
+                  </li>
+                </ul>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-advanced" id="card-adv-testnet">
-                     <div class="card-body">
-                         <h5><i class="bi bi-joystick"></i> Testnet (Practice Network)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">A parallel Bitcoin network where the coins have no real-world value. Excellent for safely testing wallet features, practicing recovery procedures, or learning without risking real money.</p>
-                              <!-- Simple concept, less need for collapse -->
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-advanced" id="card-adv-testnet">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-joystick"></i> Testnet (Practice Network)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    A parallel Bitcoin network where the coins have no
+                    real-world value. Excellent for safely testing wallet
+                    features, practicing recovery procedures, or learning
+                    without risking real money.
+                  </p>
+                  <!-- Simple concept, less need for collapse -->
+                </div>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
-
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ========================================= -->
-    <!-- SECTION VIII: Hardware Wallet Comparison (Renumbered) -->
-    <!-- ========================================= -->
-    <div class="schema-container cat-comparison" data-section-id="section-comparison">
-        <h2 class="section-title" id="section-comparison"><i class="bi bi-motherboard-fill"></i> // VIII. Hardware Wallet Comparison</h2>
+      <!-- ========================================= -->
+      <!-- SECTION VIII: Hardware Wallet Comparison (Renumbered) -->
+      <!-- ========================================= -->
+      <div
+        class="schema-container cat-comparison"
+        data-section-id="section-comparison"
+      >
+        <h2 class="section-title" id="section-comparison">
+          <i class="bi bi-motherboard-fill"></i> // VIII. Hardware Wallet
+          Comparison
+        </h2>
         <div class="row">
-             <div class="col-12">
-                 <div class="info-card btc-type-comparison" id="card-compare-factors">
-                     <div class="card-body">
-                         <h5 class="text-center"><i class="bi bi-sliders"></i> How to Choose a Hardware Wallet</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary text-center">Consider: Security Model (Chip Type, Code Audits), Bitcoin Focus vs Multi-Coin, Air-Gap Capability, User Experience, Advanced Features (Multisig, Passphrase), Price, Vendor Reputation.</p>
-                              <button class="btn btn-sm details-toggle mx-auto" type="button" data-bs-toggle="collapse" data-bs-target="#collapseCompareFactors" aria-expanded="false" aria-controls="collapseCompareFactors">
-                                Factors Explained <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseCompareFactors">
-                         <h6>Key Comparison Factors:</h6>
-                         <ul>
-                             <li><strong>Security Chip:</strong> <span class="term">Secure Element (SE)</span> is a dedicated, tamper-resistant chip (often closed-source) vs. a <span class="term">General Purpose Microcontroller (MCU)</span> which relies more on software hardening (can be more open). Both have pros/cons.</li>
-                             <li><strong>Source Code:</strong> Is the firmware (<span class="term">Open Source</span>) verifiable by the public, or (<span class="term">Closed Source</span>) requiring trust in the vendor? Hardware design openness also varies.</li>
-                             <li><strong>Coin Support:</strong> <span class="term">Bitcoin-Only</span> devices have a reduced attack surface (less code complexity). <span class="term">Multi-Coin</span> devices offer convenience if you hold other assets but add complexity.</li>
-                             <!-- Updated link to point to correct card -->
-                             <li><strong>Air-Gap Features:</strong> Does it support true air-gapped operation (via SD card/QR codes like <a href="#card-compare-coldcard">Coldcard</a>) or does it require USB/Bluetooth?</li>
-                             <li><strong>User Experience (UX):</strong> Ease of setup, screen quality, button usability, companion software quality.</li>
-                             <li><strong>Advanced Features:</strong> Support for Passphrases, Multisig (PSBT), Coin Control, Shamir Backup (SLIP-39), etc.</li>
-                             <li><strong>Price Point.</strong></li>
-                             <li><strong>Vendor Reputation & Trust:</strong> Company history, security track record, community perception, responsiveness to issues.</li>
-                         </ul>
-                         <p><strong class="term">No single "best" wallet exists. Choose based on your technical comfort, security needs, budget, and desired features.</strong></p>
-                     </div>
-                 </div>
+          <div class="col-12">
+            <div
+              class="info-card btc-type-comparison"
+              id="card-compare-factors"
+            >
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-sliders"></i> How to Choose a Hardware Wallet
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary text-center">
+                    Consider: Security Model (Chip Type, Code Audits), Bitcoin
+                    Focus vs Multi-Coin, Air-Gap Capability, User Experience,
+                    Advanced Features (Multisig, Passphrase), Price, Vendor
+                    Reputation.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle mx-auto"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseCompareFactors"
+                    aria-expanded="false"
+                    aria-controls="collapseCompareFactors"
+                  >
+                    Factors Explained <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div
+                class="collapse collapse-content"
+                id="collapseCompareFactors"
+              >
+                <h6>Key Comparison Factors:</h6>
+                <ul>
+                  <li>
+                    <strong>Security Chip:</strong>
+                    <span class="term">Secure Element (SE)</span> is a
+                    dedicated, tamper-resistant chip (often closed-source) vs. a
+                    <span class="term"
+                      >General Purpose Microcontroller (MCU)</span
+                    >
+                    which relies more on software hardening (can be more open).
+                    Both have pros/cons.
+                  </li>
+                  <li>
+                    <strong>Source Code:</strong> Is the firmware (<span
+                      class="term"
+                      >Open Source</span
+                    >) verifiable by the public, or (<span class="term"
+                      >Closed Source</span
+                    >) requiring trust in the vendor? Hardware design openness
+                    also varies.
+                  </li>
+                  <li>
+                    <strong>Coin Support:</strong>
+                    <span class="term">Bitcoin-Only</span> devices have a
+                    reduced attack surface (less code complexity).
+                    <span class="term">Multi-Coin</span> devices offer
+                    convenience if you hold other assets but add complexity.
+                  </li>
+                  <!-- Updated link to point to correct card -->
+                  <li>
+                    <strong>Air-Gap Features:</strong> Does it support true
+                    air-gapped operation (via SD card/QR codes like
+                    <a href="#card-compare-coldcard">Coldcard</a>) or does it
+                    require USB/Bluetooth?
+                  </li>
+                  <li>
+                    <strong>User Experience (UX):</strong> Ease of setup, screen
+                    quality, button usability, companion software quality.
+                  </li>
+                  <li>
+                    <strong>Advanced Features:</strong> Support for Passphrases,
+                    Multisig (PSBT), Coin Control, Shamir Backup (SLIP-39), etc.
+                  </li>
+                  <li><strong>Price Point.</strong></li>
+                  <li>
+                    <strong>Vendor Reputation & Trust:</strong> Company history,
+                    security track record, community perception, responsiveness
+                    to issues.
+                  </li>
+                </ul>
+                <p>
+                  <strong class="term"
+                    >No single "best" wallet exists. Choose based on your
+                    technical comfort, security needs, budget, and desired
+                    features.</strong
+                  >
+                </p>
+              </div>
             </div>
+          </div>
 
-            <!-- Specific Wallet Cards -->
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-trezor">
-                     <div class="card-body">
-                         <h5><i class="bi bi-unlock-fill"></i> Trezor (Safe 5 / Safe 3 / Model T)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">
-                                <span class="pros">[+] Long history, Open Source FW (device), User-friendly Suite, Passphrase (All). Safe 5: Large Color Touchscreen, Haptic feedback, Shamir/Enhanced Backup. Safe 3/5: Secure Element Option. Model T: Shamir Backup.</span>
-                                <span class="cons">[-] Safe 3/5 SE firmware is closed source. Model T uses MCU (less physical tamper resistance vs SE). No native air-gap mode (USB required). Safe 5 is higher priced.</span>
-                             </p>
-                             <p><a href="https://trezor.io/" target="_blank" rel="noopener noreferrer">trezor.io</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-           
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-coldcard">
-                     <div class="card-body">
-                         <h5><i class="bi bi-calculator-fill"></i> Coldcard (Mk4 / Q1)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">
-                                <span class="pros">[+] Bitcoin-Only (reduced attack surface), Strong security reputation, True Air-Gap (SD card, NFC, USB-PSBT), Excellent PSBT/Multisig support, Open Source Firmware, Dual Secure Elements (Mk4/Q1), Physical security (PIN, Duress PIN, Brick Me PIN). Q1 adds QWERTY keyboard, larger screen.</span>
-                                <span class="cons">[-] Steeper learning curve than others, Requires coordinator software (e.g., Sparrow, Specter), Basic UI (functional, not fancy), Q1 is larger and more expensive.</span>
-                             </p>
-                             <p><a href="https://coldcard.com/" target="_blank" rel="noopener noreferrer">coldcard.com</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
+          <!-- Specific Wallet Cards -->
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-trezor"
+            >
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-unlock-fill"></i> Trezor (Safe 5 / Safe 3 /
+                  Model T)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Long history, Open Source FW (device), User-friendly
+                      Suite, Passphrase (All). Safe 5: Large Color Touchscreen,
+                      Haptic feedback, Shamir/Enhanced Backup. Safe 3/5: Secure
+                      Element Option. Model T: Shamir Backup.</span
+                    >
+                    <span class="cons"
+                      >[-] Safe 3/5 SE firmware is closed source. Model T uses
+                      MCU (less physical tamper resistance vs SE). No native
+                      air-gap mode (USB required). Safe 5 is higher
+                      priced.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://trezor.io/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >trezor.io</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-coldcard"
+            >
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-calculator-fill"></i> Coldcard (Mk4 / Q1)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Bitcoin-Only (reduced attack surface), Strong
+                      security reputation, True Air-Gap (SD card, NFC,
+                      USB-PSBT), Excellent PSBT/Multisig support, Open Source
+                      Firmware, Dual Secure Elements (Mk4/Q1), Physical security
+                      (PIN, Duress PIN, Brick Me PIN). Q1 adds QWERTY keyboard,
+                      larger screen.</span
+                    >
+                    <span class="cons"
+                      >[-] Steeper learning curve than others, Requires
+                      coordinator software (e.g., Sparrow, Specter), Basic UI
+                      (functional, not fancy), Q1 is larger and more
+                      expensive.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://coldcard.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >coldcard.com</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
 
-                          <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-ledger">
-                     <div class="card-body">
-                         <h5><i class="bi bi-usb-fill"></i> Ledger (Nano S+ / Nano X / Stax)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">
-                                <span class="pros">[+] Uses Secure Element (SE) chip, Wide Coin Support, Popular/Well-known brand, Polished Ledger Live companion app (Desktop/Mobile), Bluetooth (Nano X).</span>
-                                <span class="cons">[-] Closed Source device firmware & SE firmware, Requires trust in vendor. Controversial 'Ledger Recover' service (opt-in seed fragment backup). Past *customer data* breach (not keys). Heavy reliance on Ledger Live app. Multi-coin support increases code complexity/attack surface vs Bitcoin-only. Stax significantly delayed.</span>
-                             </p>
-                              <p><a href="https://www.ledger.com/" target="_blank" rel="noopener noreferrer">ledger.com</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-bitkey"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-key-fill"></i> Bitkey</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Beginner-friendly setup, No user-managed seed phrase
+                      (removes major user error point), Simple hardware
+                      (fingerprint), Recovery assistance via 2-of-3 multisig
+                      (Mobile Key, Hardware Key, Server Key), Integration with
+                      partners (e.g., Cash App, Coinbase).</span
+                    >
+                    <span class="cons"
+                      >[-] **Not traditional self-custody:** Relies on a 2-of-3
+                      multisig where Block/Bitkey holds one server key,
+                      introducing counterparty risk (server availability, policy
+                      enforcement/limits, potential censorship). Mobile key is
+                      hot. Hardware key doesn't operate standalone like
+                      traditional HWs. Requires server interaction for
+                      signing/recovery. Closed-source components
+                      (especially server-side). Different trust model than fully
+                      user-controlled wallets.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://bitkey.world/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >bitkey.world</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
 
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-bitbox">
-                     <div class="card-body">
-                         <h5><i class="bi bi-box-fill"></i> BitBox02 (Bitcoin-Only Ed.)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><span class="pros">[+] Strong security focus (SE + Open FW parts), Minimalist design, BTC-Only version available, Good companion app.</span> <span class="cons">[-] Requires BitBoxApp, USB connection (no true air-gap).</span></p>
-                              <p><a href="https://bitbox.swiss/" target="_blank" rel="noopener noreferrer">bitbox.swiss</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-              <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-seedsigner">
-                     <div class="card-body">
-                         <h5><i class="bi bi-qr-code-scan"></i> Seedsigner (DIY)</h5>
-                         <div class="card-content-wrapper">
-                              <p class="summary"><span class="pros">[+] Very Low Cost, DIY/Educational, Fully Air-Gapped via QR codes (stateless option), Fully Open Source HW & SW.</span> <span class="cons">[-] Requires assembly & setup, UX depends on components used, QR scanning can be slower.</span></p>
-                              <p><a href="https://seedsigner.com/" target="_blank" rel="noopener noreferrer">seedsigner.com</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-              <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-jade">
-                     <div class="card-body">
-                         <h5><i class="bi bi-camera-fill"></i> Blockstream Jade</h5>
-                         <div class="card-content-wrapper">
-                              <p class="summary"><span class="pros">[+] Affordable, Bitcoin-focused, Optional QR Air-Gap mode, Open Source HW/FW, Stateless/Server-assisted security model option.</span> <span class="cons">[-] Server assistance ("Blind Oracle") requires trust (optional unlock), Basic UI.</span></p>
-                              <p><a href="https://blockstream.com/jade/" target="_blank" rel="noopener noreferrer">blockstream.com/jade/</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-              <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-passport">
-                     <div class="card-body">
-                         <h5><i class="bi bi-passport-fill"></i> Foundation Passport (Batch 2)</h5>
-                         <div class="card-content-wrapper">
-                              <p class="summary"><span class="pros">[+] Premium build quality, Bitcoin-focused, Air-Gapped via QR/SD card, Strong security emphasis, Open Source FW.</span> <span class="cons">[-] Higher price point, Relies on companion app/coordinator SW.</span></p>
-                              <p><a href="https://foundationdevices.com/" target="_blank" rel="noopener noreferrer">foundationdevices.com</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-             <div class="col-lg-4 col-md-6"> <!-- Spacer/Choice Card -->
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-choice">
-                      <div class="card-body">
-                          <h5 class="text-center"><i class="bi bi-check2-square"></i> Making Your Choice</h5>
-                          <div class="card-content-wrapper">
-                              <p class="summary text-center">Factor in your technical skills, budget, need for other coins, desire for air-gap, open source preferences, advanced feature needs (like multisig), and trust in the vendor. <strong class="term">Analyze the tradeoffs based on your personal threat model and use case.</strong></p>
-                          </div>
-                      </div>
-                 </div>
-             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-ledger"
+            >
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-usb-fill"></i> Ledger (Nano S+ / Nano X /
+                  Stax)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Uses Secure Element (SE) chip, Wide Coin Support,
+                      Popular/Well-known brand, Polished Ledger Live companion
+                      app (Desktop/Mobile), Bluetooth (Nano X).</span
+                    >
+                    <span class="cons"
+                      >[-] Closed Source device firmware & SE firmware, Requires
+                      trust in vendor. Controversial 'Ledger Recover' service
+                      (opt-in seed fragment backup). Past *customer data* breach
+                      (not keys). Heavy reliance on Ledger Live app. Multi-coin
+                      support increases code complexity/attack surface vs
+                      Bitcoin-only. Stax significantly delayed.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://www.ledger.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >ledger.com</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
 
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-bitbox"
+            >
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-box-fill"></i> BitBox02 (Bitcoin-Only Ed.)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Strong security focus (SE + Open FW parts),
+                      Minimalist design, BTC-Only version available, Good
+                      companion app.</span
+                    >
+                    <span class="cons"
+                      >[-] Requires BitBoxApp, USB connection (no true
+                      air-gap).</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://bitbox.swiss/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >bitbox.swiss</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-seedsigner"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-qr-code-scan"></i> Seedsigner (DIY)</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Very Low Cost, DIY/Educational, Fully Air-Gapped via
+                      QR codes (stateless option), Fully Open Source HW &
+                      SW.</span
+                    >
+                    <span class="cons"
+                      >[-] Requires assembly & setup, UX depends on components
+                      used, QR scanning can be slower.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://seedsigner.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >seedsigner.com</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-jade"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-camera-fill"></i> Blockstream Jade</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Affordable, Bitcoin-focused, Optional QR Air-Gap
+                      mode, Open Source HW/FW, Stateless/Server-assisted
+                      security model option.</span
+                    >
+                    <span class="cons"
+                      >[-] Server assistance ("Blind Oracle") requires trust
+                      (optional unlock), Basic UI.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://blockstream.com/jade/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >blockstream.com/jade/</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-passport"
+            >
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-passport-fill"></i> Foundation Passport (Batch
+                  2)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Premium build quality, Bitcoin-focused, Air-Gapped
+                      via QR/SD card, Strong security emphasis, Open Source
+                      FW.</span
+                    >
+                    <span class="cons"
+                      >[-] Higher price point, Relies on companion
+                      app/coordinator SW.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://foundationdevices.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >foundationdevices.com</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <!-- Spacer/Choice Card -->
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-choice"
+            >
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-check2-square"></i> Making Your Choice
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary text-center">
+                    Factor in your technical skills, budget, need for other
+                    coins, desire for air-gap, open source preferences, advanced
+                    feature needs (like multisig), and trust in the vendor.
+                    <strong class="term"
+                      >Analyze the tradeoffs based on your personal threat model
+                      and use case.</strong
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ========================================= -->
-    <!-- SECTION IX: App Wallet Comparison (Renumbered & Styled) -->
-    <!-- ========================================= -->
-    <div class="schema-container cat-comparison" data-section-id="section-app-comparison">
+      <!-- ========================================= -->
+      <!-- SECTION IX: App Wallet Comparison (Renumbered & Styled) -->
+      <!-- ========================================= -->
+      <div
+        class="schema-container cat-comparison"
+        data-section-id="section-app-comparison"
+      >
         <!-- Note: This becomes Section IX -->
-        <h2 class="section-title" id="section-app-comparison"><i class="bi bi-grid-1x2-fill"></i> // IX. App Wallet Comparison (Software/Mobile)</h2>
+        <h2 class="section-title" id="section-app-comparison">
+          <i class="bi bi-grid-1x2-fill"></i> // IX. App Wallet Comparison
+          (Software/Mobile)
+        </h2>
         <div class="row">
-             <div class="col-12">
-                 <div class="info-card btc-type-comparison" id="card-app-compare-factors">
-                     <div class="card-body">
-                         <h5 class="text-center"><i class="bi bi-sliders"></i> How to Choose an App Wallet</h5>
-                         <div class="card-content-wrapper">
-                             <!-- ADDED WARNING -->
-                             <p class="summary text-center">Consider: Platform (Desktop/Mobile), Ease of Use, Features (Lightning, Coin Control, Node Connect, HW Support), Security Model, Open Source Status, Vendor Reputation. <strong class="critical">App wallets carry inherent online risks; hardware wallets are advised for substantial amounts. Focus on Non-Custodial options where YOU control the keys/seed.</strong></p>
-                              <button class="btn btn-sm details-toggle mx-auto" type="button" data-bs-toggle="collapse" data-bs-target="#collapseAppCompareFactors" aria-expanded="false" aria-controls="collapseAppCompareFactors">
-                                Factors Explained <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                      <div class="collapse collapse-content" id="collapseAppCompareFactors">
-                         <h6>Key Comparison Factors for App Wallets:</h6>
-                         <ul>
-                             <li><strong>Platform:</strong> Is it available for your device (iOS, Android, Windows, macOS, Linux)?</li>
-                             <li><strong>User Experience (UX):</strong> Is it intuitive for beginners or geared towards advanced users?</li>
-                             <li><strong>Key Features:</strong>
-                                <ul>
-                                    <li><span class="term">Lightning Network:</span> Does it support faster, cheaper Layer 2 payments?</li>
-                                    <li><span class="term">Coin Control:</span> Can you manually select UTXOs for privacy/fee management?</li>
-                                    <li><span class="term">Full Node Connection:</span> Can it connect to your own Bitcoin node for maximum privacy?</li>
-                                    <li><span class="term">Hardware Wallet Integration:</span> Can it act as an interface for your hardware wallet?</li>
-                                    <li><span class="term">Multisig Support:</span> Does it facilitate setting up or signing multisignature transactions?</li>
-                                </ul>
-                             </li>
-                             <li><strong>Security Model:</strong> How are keys stored? Does it offer extra security features (e.g., Tor support)?</li>
-                             <li><strong>Open Source:</strong> Is the code publicly available for review? This increases transparency and trust.</li>
-                             <li><strong>Reputation:</strong> Vendor track record, community perception, responsiveness to issues.</li>
-                         </ul>
-                         <p><strong class="term">Prioritize wallets that are non-custodial, well-reviewed, and ideally open-source. Test with small amounts first.</strong></p>
-                     </div>
-                 </div>
+          <div class="col-12">
+            <div
+              class="info-card btc-type-comparison"
+              id="card-app-compare-factors"
+            >
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-sliders"></i> How to Choose an App Wallet
+                </h5>
+                <div class="card-content-wrapper">
+                  <!-- ADDED WARNING -->
+                  <p class="summary text-center">
+                    Consider: Platform (Desktop/Mobile), Ease of Use, Features
+                    (Lightning, Coin Control, Node Connect, HW Support),
+                    Security Model, Open Source Status, Vendor Reputation.
+                    <strong class="critical"
+                      >App wallets carry inherent online risks; hardware wallets
+                      are advised for substantial amounts. Focus on
+                      Non-Custodial options where YOU control the
+                      keys/seed.</strong
+                    >
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle mx-auto"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseAppCompareFactors"
+                    aria-expanded="false"
+                    aria-controls="collapseAppCompareFactors"
+                  >
+                    Factors Explained <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div
+                class="collapse collapse-content"
+                id="collapseAppCompareFactors"
+              >
+                <h6>Key Comparison Factors for App Wallets:</h6>
+                <ul>
+                  <li>
+                    <strong>Platform:</strong> Is it available for your device
+                    (iOS, Android, Windows, macOS, Linux)?
+                  </li>
+                  <li>
+                    <strong>User Experience (UX):</strong> Is it intuitive for
+                    beginners or geared towards advanced users?
+                  </li>
+                  <li>
+                    <strong>Key Features:</strong>
+                    <ul>
+                      <li>
+                        <span class="term">Lightning Network:</span> Does it
+                        support faster, cheaper Layer 2 payments?
+                      </li>
+                      <li>
+                        <span class="term">Coin Control:</span> Can you manually
+                        select UTXOs for privacy/fee management?
+                      </li>
+                      <li>
+                        <span class="term">Full Node Connection:</span> Can it
+                        connect to your own Bitcoin node for maximum privacy?
+                      </li>
+                      <li>
+                        <span class="term">Hardware Wallet Integration:</span>
+                        Can it act as an interface for your hardware wallet?
+                      </li>
+                      <li>
+                        <span class="term">Multisig Support:</span> Does it
+                        facilitate setting up or signing multisignature
+                        transactions?
+                      </li>
+                    </ul>
+                  </li>
+                  <li>
+                    <strong>Security Model:</strong> How are keys stored? Does
+                    it offer extra security features (e.g., Tor support)?
+                  </li>
+                  <li>
+                    <strong>Open Source:</strong> Is the code publicly available
+                    for review? This increases transparency and trust.
+                  </li>
+                  <li>
+                    <strong>Reputation:</strong> Vendor track record, community
+                    perception, responsiveness to issues.
+                  </li>
+                </ul>
+                <p>
+                  <strong class="term"
+                    >Prioritize wallets that are non-custodial, well-reviewed,
+                    and ideally open-source. Test with small amounts
+                    first.</strong
+                  >
+                </p>
+              </div>
             </div>
+          </div>
 
-            <!-- Specific App Wallet Cards -->
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-app-sparrow">
-                     <div class="card-body">
-                         <h5><i class="bi bi-tools"></i> Sparrow Wallet</h5>
-                         <div class="card-content-wrapper">
-                             <!-- FIXED DOUBLE MARKERS -->
-                             <p class="summary"><span class="pros">[+] Desktop (Win/Mac/Linux), Feature-Rich (Coin Control, Node, HW, Multisig), Privacy focus (Tor), Open Source.</span> <span class="cons">[-] Desktop only, Can be complex for beginners.</span></p>
-                             <p><a href="https://sparrowwallet.com/" target="_blank" rel="noopener noreferrer">sparrowwallet.com</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-app-bluewallet">
-                     <div class="card-body">
-                         <h5><i class="bi bi-phone-fill"></i> BlueWallet</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><span class="pros">[+] Mobile (iOS/Android), User-Friendly, Supports Lightning (custodial LDK node option), HW integration, Multisig Vaults, Open Source.</span> <span class="cons">[-] Some advanced features less obvious, LN is custodial by default (but configurable).</span></p>
-                             <p><a href="https://bluewallet.io/" target="_blank" rel="noopener noreferrer">bluewallet.io</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-              <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-app-electrum">
-                     <div class="card-body">
-                         <h5><i class="bi bi-pc-display"></i> Electrum</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><span class="pros">[+] Desktop (Win/Mac/Linux), Mobile (Android), Long-standing, Advanced features (Coin Control, LN, Multisig, HW support), Open Source.</span> <span class="cons">[-] UI can feel dated/complex for beginners, relies on Electrum servers by default (can connect to own node).</span></p>
-                              <p><a href="https://electrum.org/" target="_blank" rel="noopener noreferrer">electrum.org</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-app-muun">
-                     <div class="card-body">
-                         <h5><i class="bi bi-recycle"></i> Muun Wallet</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><span class="pros">[+] Mobile (iOS/Android), Very Simple UI, Seamless On-chain/Lightning handling (via submarine swaps), Non-custodial LN.</span> <span class="cons">[-] Fewer advanced features (no coin control/node connect), Unique backup method (Emergency Kit + Email/Password or Social Recovery - understand it!).</span></p>
-                              <p><a href="https://muun.com/" target="_blank" rel="noopener noreferrer">muun.com</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-              <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-app-green">
-                     <div class="card-body">
-                         <h5><i class="bi bi-shield-check"></i> Blockstream Green</h5>
-                         <div class="card-content-wrapper">
-                              <p class="summary"><span class="pros">[+] Mobile (iOS/Android), Desktop (Limited), Strong focus on Multisig security (2-of-2 with server, or 2-of-3), HW support, Tor support, Open Source.</span> <span class="cons">[-] Default multisig relies on Blockstream server for one signature (2FA helps), Fewer features than Sparrow/Electrum.</span></p>
-                              <p><a href="https://blockstream.com/green/" target="_blank" rel="noopener noreferrer">blockstream.com/green</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-              <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-compare-app-nunchuk">
-                     <div class="card-body">
-                         <h5><i class="bi bi-diagram-3"></i> Nunchuk</h5>
-                         <div class="card-content-wrapper">
-                              <p class="summary"><span class="pros">[+] Mobile (iOS/Android), Desktop (Win/Mac/Linux), Strong focus on Collaborative Multisig, Intuitive multisig setup, HW support, Air-gapped signing option.</span> <span class="cons">[-] Primarily designed for multisig (can do single sig), Subscription model for some features.</span></p>
-                              <p><a href="https://nunchuk.io/" target="_blank" rel="noopener noreferrer">nunchuk.io</a></p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-             <!-- Spacer/Choice Card -->
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-comparison comparison-item" id="card-app-compare-choice">
-                      <div class="card-body">
-                          <h5 class="text-center"><i class="bi bi-check2-square"></i> Making Your Choice</h5>
-                          <div class="card-content-wrapper">
-                              <p class="summary text-center">Choose based on your primary device (mobile/desktop), technical comfort, need for specific features like Lightning or Multisig, and privacy requirements. <strong class="term">Always download from official sources and verify authenticity where possible.</strong></p>
-                          </div>
-                      </div>
-                 </div>
-             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
-
+          <!-- Specific App Wallet Cards -->
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-app-sparrow"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-tools"></i> Sparrow Wallet</h5>
+                <div class="card-content-wrapper">
+                  <!-- FIXED DOUBLE MARKERS -->
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Desktop (Win/Mac/Linux), Feature-Rich (Coin Control,
+                      Node, HW, Multisig), Privacy focus (Tor), Open
+                      Source.</span
+                    >
+                    <span class="cons"
+                      >[-] Desktop only, Can be complex for beginners.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://sparrowwallet.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >sparrowwallet.com</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-app-bluewallet"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-phone-fill"></i> BlueWallet</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Mobile (iOS/Android), User-Friendly, Supports
+                      Lightning (custodial LDK node option), HW integration,
+                      Multisig Vaults, Open Source.</span
+                    >
+                    <span class="cons"
+                      >[-] Some advanced features less obvious, LN is custodial
+                      by default (but configurable).</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://bluewallet.io/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >bluewallet.io</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-app-electrum"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-pc-display"></i> Electrum</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Desktop (Win/Mac/Linux), Mobile (Android),
+                      Long-standing, Advanced features (Coin Control, LN,
+                      Multisig, HW support), Open Source.</span
+                    >
+                    <span class="cons"
+                      >[-] UI can feel dated/complex for beginners, relies on
+                      Electrum servers by default (can connect to own
+                      node).</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://electrum.org/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >electrum.org</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-app-muun"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-recycle"></i> Muun Wallet</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Mobile (iOS/Android), Very Simple UI, Seamless
+                      On-chain/Lightning handling (via submarine swaps),
+                      Non-custodial LN.</span
+                    >
+                    <span class="cons"
+                      >[-] Fewer advanced features (no coin control/node
+                      connect), Unique backup method (Emergency Kit +
+                      Email/Password or Social Recovery - understand it!).</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://muun.com/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >muun.com</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-app-green"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-shield-check"></i> Blockstream Green</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Mobile (iOS/Android), Desktop (Limited), Strong focus
+                      on Multisig security (2-of-2 with server, or 2-of-3), HW
+                      support, Tor support, Open Source.</span
+                    >
+                    <span class="cons"
+                      >[-] Default multisig relies on Blockstream server for one
+                      signature (2FA helps), Fewer features than
+                      Sparrow/Electrum.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://blockstream.com/green/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >blockstream.com/green</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-compare-app-nunchuk"
+            >
+              <div class="card-body">
+                <h5><i class="bi bi-diagram-3"></i> Nunchuk</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <span class="pros"
+                      >[+] Mobile (iOS/Android), Desktop (Win/Mac/Linux), Strong
+                      focus on Collaborative Multisig, Intuitive multisig setup,
+                      HW support, Air-gapped signing option.</span
+                    >
+                    <span class="cons"
+                      >[-] Primarily designed for multisig (can do single sig),
+                      Subscription model for some features.</span
+                    >
+                  </p>
+                  <p>
+                    <a
+                      href="https://nunchuk.io/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >nunchuk.io</a
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+          <!-- Spacer/Choice Card -->
+          <div class="col-lg-4 col-md-6">
+            <div
+              class="info-card btc-type-comparison comparison-item"
+              id="card-app-compare-choice"
+            >
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-check2-square"></i> Making Your Choice
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary text-center">
+                    Choose based on your primary device (mobile/desktop),
+                    technical comfort, need for specific features like Lightning
+                    or Multisig, and privacy requirements.
+                    <strong class="term"
+                      >Always download from official sources and verify
+                      authenticity where possible.</strong
+                    >
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- =============================================== -->
-    <!-- SECTION X: Common Mistakes & Pitfalls (Renumbered) -->
-    <!-- =============================================== -->
-     <div class="schema-container cat-pitfalls" data-section-id="section-pitfalls">
+      <!-- =============================================== -->
+      <!-- SECTION X: Common Mistakes & Pitfalls (Renumbered) -->
+      <!-- =============================================== -->
+      <div
+        class="schema-container cat-pitfalls"
+        data-section-id="section-pitfalls"
+      >
         <!-- Note: This becomes Section X -->
-        <h2 class="section-title" id="section-pitfalls"><i class="bi bi-exclamation-diamond-fill"></i> // X. How People Lose Bitcoin (Avoid These!)</h2>
+        <h2 class="section-title" id="section-pitfalls">
+          <i class="bi bi-exclamation-diamond-fill"></i> // X. How People Lose
+          Bitcoin (Avoid These!)
+        </h2>
         <div class="row">
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-seed">
-                     <div class="card-body">
-                         <h5><i class="bi bi-journal-x"></i> Seed Phrase Loss / Compromise</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><strong class="cons">#1 CAUSE OF LOSS:</strong> Losing the physical backup, damage (fire/water), incorrect transcription, storing it digitally (photo/file/cloud -> HACKED), forgetting passphrase.</p>
-                         </div>
-                     </div>
-                 </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-seed">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-journal-x"></i> Seed Phrase Loss / Compromise
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <strong class="cons">#1 CAUSE OF LOSS:</strong> Losing the
+                    physical backup, damage (fire/water), incorrect
+                    transcription, storing it digitally (photo/file/cloud ->
+                    HACKED), forgetting passphrase.
+                  </p>
+                </div>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-phishing">
-                     <div class="card-body">
-                         <h5><i class="bi bi-broadcast"></i> Phishing / Scams</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary"><strong class="cons">#2 CAUSE OF LOSS:</strong> Being tricked into revealing your seed phrase or private keys to fake websites, fake apps, fake support agents, or malicious software.</p>
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-phishing">
+              <div class="card-body">
+                <h5><i class="bi bi-broadcast"></i> Phishing / Scams</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    <strong class="cons">#2 CAUSE OF LOSS:</strong> Being
+                    tricked into revealing your seed phrase or private keys to
+                    fake websites, fake apps, fake support agents, or malicious
+                    software.
+                  </p>
+                </div>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-malware">
-                     <div class="card-body">
-                         <h5><i class="bi bi-virus"></i> Malware on Computer/Phone</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Viruses stealing keys from software wallets, clipboard hijackers changing pasted addresses, fake wallet apps, keyloggers capturing passwords.</p>
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-malware">
+              <div class="card-body">
+                <h5><i class="bi bi-virus"></i> Malware on Computer/Phone</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Viruses stealing keys from software wallets, clipboard
+                    hijackers changing pasted addresses, fake wallet apps,
+                    keyloggers capturing passwords.
+                  </p>
+                </div>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-physical">
-                     <div class="card-body">
-                         <h5><i class="bi bi-person-fill-x"></i> Physical Theft / Coercion</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Theft of poorly secured seed phrase backups, theft of hardware wallet (PIN/Passphrase is defense), being forced to reveal keys ("$5 wrench attack").</p>
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-physical">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-person-fill-x"></i> Physical Theft / Coercion
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Theft of poorly secured seed phrase backups, theft of
+                    hardware wallet (PIN/Passphrase is defense), being forced to
+                    reveal keys ("$5 wrench attack").
+                  </p>
+                </div>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-device">
-                     <div class="card-body">
-                         <h5><i class="bi bi-hdd-rack-fill"></i> Device Issues (Without Backup)</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Forgetting PIN after too many tries (requires seed restore), device failure/damage <span class="term">without having a verified seed backup</span>, accidental factory reset.</p>
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-device">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-hdd-rack-fill"></i> Device Issues (Without
+                  Backup)
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Forgetting PIN after too many tries (requires seed restore),
+                    device failure/damage
+                    <span class="term"
+                      >without having a verified seed backup</span
+                    >, accidental factory reset.
+                  </p>
+                </div>
+              </div>
             </div>
-            <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-estate">
-                     <div class="card-body">
-                         <h5><i class="bi bi-person-slash"></i> Lack of Inheritance Plan</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Owner passes away or becomes incapacitated without leaving clear, secure instructions for heirs to access the funds. Bitcoin becomes permanently lost.</p>
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-estate">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-person-slash"></i> Lack of Inheritance Plan
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Owner passes away or becomes incapacitated without leaving
+                    clear, secure instructions for heirs to access the funds.
+                    Bitcoin becomes permanently lost.
+                  </p>
+                </div>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6">
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-supply">
-                     <div class="card-body">
-                         <h5><i class="bi bi-truck"></i> Supply Chain / Bad Vendor</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Receiving a tampered hardware wallet (always buy direct!), using insecure or malicious wallet software from unknown sources.</p>
-                         </div>
-                     </div>
-                 </div>
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <div class="info-card btc-type-pitfall" id="card-pitfall-supply">
+              <div class="card-body">
+                <h5><i class="bi bi-truck"></i> Supply Chain / Bad Vendor</h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Receiving a tampered hardware wallet (always buy direct!),
+                    using insecure or malicious wallet software from unknown
+                    sources.
+                  </p>
+                </div>
+              </div>
             </div>
-             <div class="col-lg-4 col-md-6"> <!-- Spacer/Summary Card -->
-                 <div class="info-card btc-type-pitfall" id="card-pitfall-summary">
-                     <div class="card-body">
-                         <h5><i class="bi bi-shield-exclamation"></i> Prevention is Key</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary">Most losses are preventable through careful seed phrase management, vigilance against scams, using reputable hardware, and having robust backup plans.</p>
-                         </div>
-                     </div>
-                 </div>
-             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+          <div class="col-lg-4 col-md-6">
+            <!-- Spacer/Summary Card -->
+            <div class="info-card btc-type-pitfall" id="card-pitfall-summary">
+              <div class="card-body">
+                <h5>
+                  <i class="bi bi-shield-exclamation"></i> Prevention is Key
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary">
+                    Most losses are preventable through careful seed phrase
+                    management, vigilance against scams, using reputable
+                    hardware, and having robust backup plans.
+                  </p>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ======================= -->
-    <!-- SECTION XI: Glossary (Renumbered) -->
-    <!-- ======================= -->
-     <div class="schema-container cat-glossary" data-section-id="section-glossary">
+      <!-- ======================= -->
+      <!-- SECTION XI: Glossary (Renumbered) -->
+      <!-- ======================= -->
+      <div
+        class="schema-container cat-glossary"
+        data-section-id="section-glossary"
+      >
         <!-- Note: This becomes Section XI -->
-        <h2 class="section-title" id="section-glossary"><i class="bi bi-book-half"></i> // XI. Terminology Glossary</h2>
-         <div class="row">
-            <div class="col-12">
-                 <div class="info-card btc-type-glossary" id="card-glossary">
-                     <div class="card-body">
-                        <h5 class="text-center"><i class="bi bi-translate"></i> Key Terms Defined</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary text-center">Quick definitions for common Bitcoin and wallet terms used in this guide.</p>
-                             <button class="btn btn-sm details-toggle mx-auto" type="button" data-bs-toggle="collapse" data-bs-target="#collapseGlossary" aria-expanded="false" aria-controls="collapseGlossary">
-                                View Glossary <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                    <div class="collapse collapse-content" id="collapseGlossary">
-                        <dl>
-                             <!-- Reviewed/Refined terms emphasized -->
-                            <dt>Address</dt><dd>Identifier used to receive Bitcoin (e.g., starts with 1, 3, bc1q, bc1p). Generated from your public key.</dd>
-                            <dt>Air Gap</dt><dd>Keeping a device (like a hardware wallet or dedicated signing computer) physically isolated from network connections (internet, Bluetooth).</dd>
-                            <dt>BIP (Bitcoin Improvement Proposal)</dt><dd>Standards documents for the Bitcoin protocol (e.g., BIP-32, BIP-39).</dd>
-                            <dt>BIP-32</dt><dd>Standard for Hierarchical Deterministic (HD) wallets, allowing many keys to be derived from a single master seed.</dd>
-                            <dt>BIP-39</dt><dd>Standard for mnemonic seed phrases (12/24 words) used to back up and recover HD wallets.</dd>
-                            <dt>BIP-44/84/86</dt><dd>Standards defining specific ways (derivation paths) to organize keys for different address types (Legacy, SegWit, Taproot) within a BIP-32 wallet.</dd>
-                            <dt>Bitcoin Core</dt><dd>The primary, reference implementation of the Bitcoin full node software.</dd>
-                            <dt>Block Explorer</dt><dd>A website or tool used to view information on the public blockchain (transactions, addresses, blocks).</dd>
-                            <dt>Blockchain</dt><dd>The distributed, public, and immutable ledger that records all Bitcoin transactions.</dd>
-                            <dt>Cold Storage</dt><dd><strong class="term">Storing private keys completely offline, away from internet connections.</strong> The most secure way to hold Bitcoin, typically achieved using hardware wallets or fully air-gapped devices.</dd>
-                            <dt>Coin Control</dt><dd>Manually selecting specific UTXOs (unspent chunks of Bitcoin) to use as inputs when creating a transaction.</dd>
-                            <dt>Confirmation</dt><dd>The inclusion of a transaction in a block added to the blockchain. More confirmations increase transaction finality.</dd>
-                            <dt>CPFP (Child-Pays-For-Parent)</dt><dd>A fee-bumping technique where you spend an unconfirmed incoming transaction (the 'child') with a high fee, incentivizing miners to confirm both the child and its stuck 'parent'.</dd>
-                            <dt>Custodial</dt><dd>A service where a third party (like an exchange) holds your private keys for you. <strong class="critical">You don't truly control the Bitcoin; "Not your keys, not your coins."</strong></dd>
-                            <dt>Derivation Path</dt><dd>A specific "route" defined by standards like BIP-44/84/86, telling the wallet how to find/generate specific keys/addresses from the master seed (e.g., m/84'/0'/0'/0/0).</dd>
-                            <dt>Fee Rate (sat/vB)</dt><dd>The price paid for transaction inclusion, measured in satoshis per virtual byte of transaction data size.</dd>
-                            <dt>Full Node</dt><dd>Software that downloads and independently validates the entire Bitcoin blockchain according to the network's consensus rules.</dd>
-                            <dt>Hardware Wallet</dt><dd><strong class="term">A physical device designed to securely store private keys offline (cold storage) and sign transactions without exposing keys to a connected computer/phone.</strong> The recommended standard for significant holdings.</dd>
-                            <dt>HD Wallet (Hierarchical Deterministic)</dt><dd>A wallet using BIP-32, where all keys and addresses are derived from a single master seed (backed up by the BIP-39 seed phrase).</dd>
-                            <dt>Hot Wallet</dt><dd><strong class="term">A wallet where the private keys are stored on a device that is connected to the internet (e.g., software wallets on phones/computers).</strong> Convenient for spending, but carries higher risk than cold storage.</dd>
-                            <dt>Keys (Private/Public)</dt><dd>Cryptographic pair: Private Key (secret, signs transactions), Public Key (sharable, derives addresses).</dd>
-                            <dt>Mempool</dt><dd>The "waiting room" for broadcasted transactions before they are confirmed in a block by miners.</dd>
-                            <dt>Multisignature (Multisig)</dt><dd>A setup requiring signatures from multiple private keys (M out of N total keys, e.g., 2-of-3) to authorize a transaction.</dd>
-                            <dt>Non-Custodial</dt><dd>A wallet where <strong class="term">YOU</strong> control your own private keys and seed phrase (<span class="term">Self-Custody</span>). This cheatsheet focuses on non-custodial solutions.</dd>
-                            <dt>OPSEC (Operations Security)</dt><dd>Practices and procedures to protect sensitive information (like your seed phrase and keys) and reduce risks.</dd>
-                            <dt>Passphrase (BIP-39)</dt><dd>An optional, user-defined "25th word" added to the seed phrase to create a hidden wallet. <strong class="critical">Lose the passphrase, lose the funds in that hidden wallet.</strong></dd>
-                            <dt>Private Key</dt><dd>The secret data that proves ownership and allows spending of Bitcoin associated with specific addresses.</dd>
-                            <dt>PSBT (Partially Signed Bitcoin Transaction)</dt><dd>A standard format (BIP-174) for passing transactions between signers or devices without revealing sensitive key information, used in multisig and air-gapped setups.</dd>
-                            <dt>Public Key</dt><dd>Derived from the private key, used to generate receiving addresses. Safe to share.</dd>
-                            <dt>QR Code</dt><dd>A square barcode often used to easily share Bitcoin addresses or transaction data.</dd>
-                            <dt>RBF (Replace-By-Fee)</dt><dd>A fee-bumping technique (BIP-125) allowing you to replace your own unconfirmed transaction with a new one that includes a higher fee.</dd>
-                            <dt>Satoshis (Sats)</dt><dd>The smallest divisible unit of Bitcoin. 1 BTC = 100,000,000 sats.</dd>
-                            <dt>Secure Element (SE)</dt><dd>A specialized, tamper-resistant chip found in some hardware wallets, designed to securely store cryptographic keys.</dd>
-                            <dt>Seed Phrase</dt><dd><strong class="term">The mnemonic backup (usually 12 or 24 words, BIP-39) for your HD wallet's master private key. Your ultimate recovery tool.</strong></dd>
-                            <dt>Self-Custody</dt><dd><strong class="term">The practice of holding and controlling your own private keys, rather than relying on a third party.</strong> Empowers the user but requires responsibility.</dd>
-                            <dt>Shamir Backup (SLIP-39)</dt><dd>A standard for splitting a seed into multiple 'shares', requiring a certain threshold (e.g., 3-of-5) to recover the wallet. Offers redundancy.</dd>
-                            <dt>Signature</dt><dd>A piece of cryptographic data created using a private key to prove ownership and authorize a transaction.</dd>
-                            <dt>Software Wallet</dt><dd>A wallet application running on a general-purpose device like a computer or smartphone (typically a hot wallet).</dd>
-                            <dt>Taproot</dt><dd>A recent Bitcoin protocol upgrade (P2TR addresses, starting bc1p) improving efficiency and privacy potential for complex transactions.</dd>
-                            <dt>Testnet</dt><dd>A parallel Bitcoin network used for testing purposes, where coins have no real value.</dd>
-                            <dt>UTXO (Unspent Transaction Output)</dt><dd>An individual "chunk" of bitcoin recorded on the blockchain that can be spent as an input in a new transaction.</dd>
-                            <dt>Watch-Only Wallet</dt><dd>A wallet loaded only with public keys or addresses. It can track balances and transactions but cannot sign or spend funds.</dd>
-                        </dl>
-                    </div>
-                 </div>
+        <h2 class="section-title" id="section-glossary">
+          <i class="bi bi-book-half"></i> // XI. Terminology Glossary
+        </h2>
+        <div class="row">
+          <div class="col-12">
+            <div class="info-card btc-type-glossary" id="card-glossary">
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-translate"></i> Key Terms Defined
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary text-center">
+                    Quick definitions for common Bitcoin and wallet terms used
+                    in this guide.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle mx-auto"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseGlossary"
+                    aria-expanded="false"
+                    aria-controls="collapseGlossary"
+                  >
+                    View Glossary <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseGlossary">
+                <dl>
+                  <!-- Reviewed/Refined terms emphasized -->
+                  <dt>Address</dt>
+                  <dd>
+                    Identifier used to receive Bitcoin (e.g., starts with 1, 3,
+                    bc1q, bc1p). Generated from your public key.
+                  </dd>
+                  <dt>Air Gap</dt>
+                  <dd>
+                    Keeping a device (like a hardware wallet or dedicated
+                    signing computer) physically isolated from network
+                    connections (internet, Bluetooth).
+                  </dd>
+                  <dt>BIP (Bitcoin Improvement Proposal)</dt>
+                  <dd>
+                    Standards documents for the Bitcoin protocol (e.g., BIP-32,
+                    BIP-39).
+                  </dd>
+                  <dt>BIP-32</dt>
+                  <dd>
+                    Standard for Hierarchical Deterministic (HD) wallets,
+                    allowing many keys to be derived from a single master seed.
+                  </dd>
+                  <dt>BIP-39</dt>
+                  <dd>
+                    Standard for mnemonic seed phrases (12/24 words) used to
+                    back up and recover HD wallets.
+                  </dd>
+                  <dt>BIP-44/84/86</dt>
+                  <dd>
+                    Standards defining specific ways (derivation paths) to
+                    organize keys for different address types (Legacy, SegWit,
+                    Taproot) within a BIP-32 wallet.
+                  </dd>
+                  <dt>Bitcoin Core</dt>
+                  <dd>
+                    The primary, reference implementation of the Bitcoin full
+                    node software.
+                  </dd>
+                  <dt>Block Explorer</dt>
+                  <dd>
+                    A website or tool used to view information on the public
+                    blockchain (transactions, addresses, blocks).
+                  </dd>
+                  <dt>Blockchain</dt>
+                  <dd>
+                    The distributed, public, and immutable ledger that records
+                    all Bitcoin transactions.
+                  </dd>
+                  <dt>Cold Storage</dt>
+                  <dd>
+                    <strong class="term"
+                      >Storing private keys completely offline, away from
+                      internet connections.</strong
+                    >
+                    The most secure way to hold Bitcoin, typically achieved
+                    using hardware wallets or fully air-gapped devices.
+                  </dd>
+                  <dt>Coin Control</dt>
+                  <dd>
+                    Manually selecting specific UTXOs (unspent chunks of
+                    Bitcoin) to use as inputs when creating a transaction.
+                  </dd>
+                  <dt>Confirmation</dt>
+                  <dd>
+                    The inclusion of a transaction in a block added to the
+                    blockchain. More confirmations increase transaction
+                    finality.
+                  </dd>
+                  <dt>CPFP (Child-Pays-For-Parent)</dt>
+                  <dd>
+                    A fee-bumping technique where you spend an unconfirmed
+                    incoming transaction (the 'child') with a high fee,
+                    incentivizing miners to confirm both the child and its stuck
+                    'parent'.
+                  </dd>
+                  <dt>Custodial</dt>
+                  <dd>
+                    A service where a third party (like an exchange) holds your
+                    private keys for you.
+                    <strong class="critical"
+                      >You don't truly control the Bitcoin; "Not your keys, not
+                      your coins."</strong
+                    >
+                  </dd>
+                  <dt>Derivation Path</dt>
+                  <dd>
+                    A specific "route" defined by standards like BIP-44/84/86,
+                    telling the wallet how to find/generate specific
+                    keys/addresses from the master seed (e.g., m/84'/0'/0'/0/0).
+                  </dd>
+                  <dt>Fee Rate (sat/vB)</dt>
+                  <dd>
+                    The price paid for transaction inclusion, measured in
+                    satoshis per virtual byte of transaction data size.
+                  </dd>
+                  <dt>Full Node</dt>
+                  <dd>
+                    Software that downloads and independently validates the
+                    entire Bitcoin blockchain according to the network's
+                    consensus rules.
+                  </dd>
+                  <dt>Hardware Wallet</dt>
+                  <dd>
+                    <strong class="term"
+                      >A physical device designed to securely store private keys
+                      offline (cold storage) and sign transactions without
+                      exposing keys to a connected computer/phone.</strong
+                    >
+                    The recommended standard for significant holdings.
+                  </dd>
+                  <dt>HD Wallet (Hierarchical Deterministic)</dt>
+                  <dd>
+                    A wallet using BIP-32, where all keys and addresses are
+                    derived from a single master seed (backed up by the BIP-39
+                    seed phrase).
+                  </dd>
+                  <dt>Hot Wallet</dt>
+                  <dd>
+                    <strong class="term"
+                      >A wallet where the private keys are stored on a device
+                      that is connected to the internet (e.g., software wallets
+                      on phones/computers).</strong
+                    >
+                    Convenient for spending, but carries higher risk than cold
+                    storage.
+                  </dd>
+                  <dt>Keys (Private/Public)</dt>
+                  <dd>
+                    Cryptographic pair: Private Key (secret, signs
+                    transactions), Public Key (sharable, derives addresses).
+                  </dd>
+                  <dt>Mempool</dt>
+                  <dd>
+                    The "waiting room" for broadcasted transactions before they
+                    are confirmed in a block by miners.
+                  </dd>
+                  <dt>Multisignature (Multisig)</dt>
+                  <dd>
+                    A setup requiring signatures from multiple private keys (M
+                    out of N total keys, e.g., 2-of-3) to authorize a
+                    transaction.
+                  </dd>
+                  <dt>Non-Custodial</dt>
+                  <dd>
+                    A wallet where <strong class="term">YOU</strong> control
+                    your own private keys and seed phrase (<span class="term"
+                      >Self-Custody</span
+                    >). This cheatsheet focuses on non-custodial solutions.
+                  </dd>
+                  <dt>OPSEC (Operations Security)</dt>
+                  <dd>
+                    Practices and procedures to protect sensitive information
+                    (like your seed phrase and keys) and reduce risks.
+                  </dd>
+                  <dt>Passphrase (BIP-39)</dt>
+                  <dd>
+                    An optional, user-defined "25th word" added to the seed
+                    phrase to create a hidden wallet.
+                    <strong class="critical"
+                      >Lose the passphrase, lose the funds in that hidden
+                      wallet.</strong
+                    >
+                  </dd>
+                  <dt>Private Key</dt>
+                  <dd>
+                    The secret data that proves ownership and allows spending of
+                    Bitcoin associated with specific addresses.
+                  </dd>
+                  <dt>PSBT (Partially Signed Bitcoin Transaction)</dt>
+                  <dd>
+                    A standard format (BIP-174) for passing transactions between
+                    signers or devices without revealing sensitive key
+                    information, used in multisig and air-gapped setups.
+                  </dd>
+                  <dt>Public Key</dt>
+                  <dd>
+                    Derived from the private key, used to generate receiving
+                    addresses. Safe to share.
+                  </dd>
+                  <dt>QR Code</dt>
+                  <dd>
+                    A square barcode often used to easily share Bitcoin
+                    addresses or transaction data.
+                  </dd>
+                  <dt>RBF (Replace-By-Fee)</dt>
+                  <dd>
+                    A fee-bumping technique (BIP-125) allowing you to replace
+                    your own unconfirmed transaction with a new one that
+                    includes a higher fee.
+                  </dd>
+                  <dt>Satoshis (Sats)</dt>
+                  <dd>
+                    The smallest divisible unit of Bitcoin. 1 BTC = 100,000,000
+                    sats.
+                  </dd>
+                  <dt>Secure Element (SE)</dt>
+                  <dd>
+                    A specialized, tamper-resistant chip found in some hardware
+                    wallets, designed to securely store cryptographic keys.
+                  </dd>
+                  <dt>Seed Phrase</dt>
+                  <dd>
+                    <strong class="term"
+                      >The mnemonic backup (usually 12 or 24 words, BIP-39) for
+                      your HD wallet's master private key. Your ultimate
+                      recovery tool.</strong
+                    >
+                  </dd>
+                  <dt>Self-Custody</dt>
+                  <dd>
+                    <strong class="term"
+                      >The practice of holding and controlling your own private
+                      keys, rather than relying on a third party.</strong
+                    >
+                    Empowers the user but requires responsibility.
+                  </dd>
+                  <dt>Shamir Backup (SLIP-39)</dt>
+                  <dd>
+                    A standard for splitting a seed into multiple 'shares',
+                    requiring a certain threshold (e.g., 3-of-5) to recover the
+                    wallet. Offers redundancy.
+                  </dd>
+                  <dt>Signature</dt>
+                  <dd>
+                    A piece of cryptographic data created using a private key to
+                    prove ownership and authorize a transaction.
+                  </dd>
+                  <dt>Software Wallet</dt>
+                  <dd>
+                    A wallet application running on a general-purpose device
+                    like a computer or smartphone (typically a hot wallet).
+                  </dd>
+                  <dt>Taproot</dt>
+                  <dd>
+                    A recent Bitcoin protocol upgrade (P2TR addresses, starting
+                    bc1p) improving efficiency and privacy potential for complex
+                    transactions.
+                  </dd>
+                  <dt>Testnet</dt>
+                  <dd>
+                    A parallel Bitcoin network used for testing purposes, where
+                    coins have no real value.
+                  </dd>
+                  <dt>UTXO (Unspent Transaction Output)</dt>
+                  <dd>
+                    An individual "chunk" of bitcoin recorded on the blockchain
+                    that can be spent as an input in a new transaction.
+                  </dd>
+                  <dt>Watch-Only Wallet</dt>
+                  <dd>
+                    A wallet loaded only with public keys or addresses. It can
+                    track balances and transactions but cannot sign or spend
+                    funds.
+                  </dd>
+                </dl>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
 
-    <!-- ========================== -->
-    <!-- SECTION XII: Further Resources (Renumbered) -->
-    <!-- ========================== -->
-    <div class="schema-container cat-resources" data-section-id="section-resources">
+      <!-- ========================== -->
+      <!-- SECTION XII: Further Resources (Renumbered) -->
+      <!-- ========================== -->
+      <div
+        class="schema-container cat-resources"
+        data-section-id="section-resources"
+      >
         <!-- Note: This becomes Section XII -->
-        <h2 class="section-title" id="section-resources"><i class="bi bi-compass-fill"></i> // XII. Further Resources & Tools</h2>
-         <div class="row">
-            <div class="col-12">
-                 <div class="info-card btc-type-resource" id="card-resources">
-                     <div class="card-body">
-                         <h5 class="text-center"><i class="bi bi-link-45deg"></i> Recommended Links</h5>
-                         <div class="card-content-wrapper">
-                             <p class="summary text-center">Links to reputable wallet software, hardware vendors, block explorers, educational sites, and related content.</p>
-                              <button class="btn btn-sm details-toggle mx-auto" type="button" data-bs-toggle="collapse" data-bs-target="#collapseResources" aria-expanded="false" aria-controls="collapseResources">
-                                Browse Links <i class="bi bi-chevron-down"></i>
-                            </button>
-                         </div>
-                     </div>
-                     <div class="collapse collapse-content" id="collapseResources">
-                        <h6>A. Recommended Software Wallets (Non-Custodial):</h6>
-                        <ul>
-                            <!-- Links updated to point to correct section IX cards where applicable -->
-                            <li>Desktop: <a href="#card-compare-app-sparrow">Sparrow Wallet</a> (Feature-rich, Privacy/Node focus), <a href="#card-compare-app-electrum">Electrum</a> (Long-standing, Advanced), <a href="https://specter.solutions/" target="_blank" rel="noopener noreferrer">Specter Desktop</a> (Multisig/HW focus)</li>
-                            <li>Mobile: <a href="#card-compare-app-bluewallet">BlueWallet</a> (User-friendly, versatile), <a href="#card-compare-app-muun">Muun Wallet</a> (Simple, Lightning focus), <a href="#card-compare-app-green">Blockstream Green</a> (Multisig options)</li>
-                            <li>Multisig Coordinator: <a href="#card-compare-app-nunchuk">Nunchuk</a> (Mobile/Desktop)</li>
-                        </ul>
-                        <h6>B. Reputable Hardware Wallet Vendors (Buy Direct!):</h6>
-                        <ul>
-                             <!-- Links updated to point to correct section VIII cards -->
-                            <li><a href="#card-compare-trezor">Trezor</a></li>
-                            <li><a href="#card-compare-coldcard">Coldcard</a> (Coinkite)</li>
-                            <li><a href="#card-compare-ledger">Ledger</a></li>
-                            <li><a href="#card-compare-bitbox">BitBox</a> (Shift Crypto)</li>
-                            <li><a href="#card-compare-jade">Blockstream Jade</a></li>
-                            <li><a href="#card-compare-passport">Foundation Devices</a> (Passport)</li>
-                            <li><a href="#card-compare-seedsigner">Seedsigner</a> (DIY Project)</li>
-                        </ul>
-                        <h6>C. Block Explorers:</h6>
-                        <ul>
-                            <li><a href="https://mempool.space/" target="_blank" rel="noopener noreferrer">mempool.space</a> (Popular, comprehensive)</li>
-                            <li><a href="https://blockstream.info/" target="_blank" rel="noopener noreferrer">Blockstream.info</a></li>
-                        </ul>
-                        <h6>D. Educational Resources:</h6>
-                        <ul>
-                            <li><a href="https://bitcoin.org/en/" target="_blank" rel="noopener noreferrer">Bitcoin.org</a> (Official site, good starting point)</li>
-                            <li><a href="https://bitcoin.page/" target="_blank" rel="noopener noreferrer">bitcoin.page</a> (Curated resources)</li>
-                            <li><a href="https://www.lopp.net/bitcoin-information.html" target="_blank" rel="noopener noreferrer">Lopp.net Bitcoin Resources</a> (Very comprehensive list)</li>
-                            <li><a href="https://en.bitcoin.it/wiki/Main_Page" target="_blank" rel="noopener noreferrer">Bitcoin Wiki</a> (Community-maintained)</li>
-                            <li><a href="https://bitcoinops.org/" target="_blank" rel="noopener noreferrer">Bitcoin Optech</a> (Technical developments)</li>
-                        </ul>
-                         <h6>E. Related Content / Author Links (Original):</h6>
-                        <ul>
-                            <li><a href="https://walletrecovery.info/articles/" target="_blank" rel="noopener noreferrer">WalletRecovery.info Articles</a></li>
-                            <li><a href="https://davidveksler.substack.com/archive" target="_blank" rel="noopener noreferrer">David Veksler Substack Archive</a></li>
-                            <li><a href="https://cheatsheets.davidveksler.com" target="_blank" rel="noopener noreferrer">More Cheatsheets</a></li>
-                        </ul>
-                     </div>
-                 </div>
+        <h2 class="section-title" id="section-resources">
+          <i class="bi bi-compass-fill"></i> // XII. Further Resources & Tools
+        </h2>
+        <div class="row">
+          <div class="col-12">
+            <div class="info-card btc-type-resource" id="card-resources">
+              <div class="card-body">
+                <h5 class="text-center">
+                  <i class="bi bi-link-45deg"></i> Recommended Links
+                </h5>
+                <div class="card-content-wrapper">
+                  <p class="summary text-center">
+                    Links to reputable wallet software, hardware vendors, block
+                    explorers, educational sites, and related content.
+                  </p>
+                  <button
+                    class="btn btn-sm details-toggle mx-auto"
+                    type="button"
+                    data-bs-toggle="collapse"
+                    data-bs-target="#collapseResources"
+                    aria-expanded="false"
+                    aria-controls="collapseResources"
+                  >
+                    Browse Links <i class="bi bi-chevron-down"></i>
+                  </button>
+                </div>
+              </div>
+              <div class="collapse collapse-content" id="collapseResources">
+                <h6>A. Recommended Software Wallets (Non-Custodial):</h6>
+                <ul>
+                  <!-- Links updated to point to correct section IX cards where applicable -->
+                  <li>
+                    Desktop:
+                    <a href="#card-compare-app-sparrow">Sparrow Wallet</a>
+                    (Feature-rich, Privacy/Node focus),
+                    <a href="#card-compare-app-electrum">Electrum</a>
+                    (Long-standing, Advanced),
+                    <a
+                      href="https://specter.solutions/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Specter Desktop</a
+                    >
+                    (Multisig/HW focus)
+                  </li>
+                  <li>
+                    Mobile:
+                    <a href="#card-compare-app-bluewallet">BlueWallet</a>
+                    (User-friendly, versatile),
+                    <a href="#card-compare-app-muun">Muun Wallet</a> (Simple,
+                    Lightning focus),
+                    <a href="#card-compare-app-green">Blockstream Green</a>
+                    (Multisig options)
+                  </li>
+                  <li>
+                    Multisig Coordinator:
+                    <a href="#card-compare-app-nunchuk">Nunchuk</a>
+                    (Mobile/Desktop)
+                  </li>
+                </ul>
+                <h6>B. Reputable Hardware Wallet Vendors (Buy Direct!):</h6>
+                <ul>
+                  <!-- Links updated to point to correct section VIII cards -->
+                  <li><a href="#card-compare-trezor">Trezor</a></li>
+                  <li>
+                    <a href="#card-compare-coldcard">Coldcard</a> (Coinkite)
+                  </li>
+                  <li><a href="#card-compare-ledger">Ledger</a></li>
+                  <li>
+                    <a href="#card-compare-bitbox">BitBox</a> (Shift Crypto)
+                  </li>
+                  <li><a href="#card-compare-jade">Blockstream Jade</a></li>
+                  <li>
+                    <a href="#card-compare-passport">Foundation Devices</a>
+                    (Passport)
+                  </li>
+                  <li>
+                    <a href="#card-compare-seedsigner">Seedsigner</a> (DIY
+                    Project)
+                  </li>
+                </ul>
+                <h6>C. Block Explorers:</h6>
+                <ul>
+                  <li>
+                    <a
+                      href="https://mempool.space/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >mempool.space</a
+                    >
+                    (Popular, comprehensive)
+                  </li>
+                  <li>
+                    <a
+                      href="https://blockstream.info/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Blockstream.info</a
+                    >
+                  </li>
+                </ul>
+                <h6>D. Educational Resources:</h6>
+                <ul>
+                  <li>
+                    <a
+                      href="https://bitcoin.org/en/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Bitcoin.org</a
+                    >
+                    (Official site, good starting point)
+                  </li>
+                  <li>
+                    <a
+                      href="https://bitcoin.page/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >bitcoin.page</a
+                    >
+                    (Curated resources)
+                  </li>
+                  <li>
+                    <a
+                      href="https://www.lopp.net/bitcoin-information.html"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Lopp.net Bitcoin Resources</a
+                    >
+                    (Very comprehensive list)
+                  </li>
+                  <li>
+                    <a
+                      href="https://en.bitcoin.it/wiki/Main_Page"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Bitcoin Wiki</a
+                    >
+                    (Community-maintained)
+                  </li>
+                  <li>
+                    <a
+                      href="https://bitcoinops.org/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >Bitcoin Optech</a
+                    >
+                    (Technical developments)
+                  </li>
+                </ul>
+                <h6>E. Related Content / Author Links (Original):</h6>
+                <ul>
+                  <li>
+                    <a
+                      href="https://walletrecovery.info/articles/"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >WalletRecovery.info Articles</a
+                    >
+                  </li>
+                  <li>
+                    <a
+                      href="https://davidveksler.substack.com/archive"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >David Veksler Substack Archive</a
+                    >
+                  </li>
+                  <li>
+                    <a
+                      href="https://cheatsheets.davidveksler.com"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      >More Cheatsheets</a
+                    >
+                  </li>
+                </ul>
+              </div>
             </div>
-        </div> <!-- /.row -->
-    </div> <!-- /.schema-container -->
-
+          </div>
+        </div>
+        <!-- /.row -->
+      </div>
+      <!-- /.schema-container -->
+    </div>
+    <!-- /container -->
 
-</div> <!-- /container -->
+    <footer class="container text-center">
+      <p id="footer-year"></p>
+      <!-- Footer text set by JS -->
+    </footer>
 
-<footer class="container text-center">
-    <p id="footer-year"></p> <!-- Footer text set by JS -->
-</footer>
-
-<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
-<script>
-document.addEventListener('DOMContentLoaded', () => {
-    const footerYearEl = document.getElementById('footer-year');
-    if (footerYearEl) {
-        // Updated Footer Text with Dynamic Year
-        footerYearEl.textContent = `Bitcoin Wallet Cheatsheet v2.2 - Secure Self-Custody Guide - © ${new Date().getFullYear()} David Veksler (Content Refined)`;
-    }
+    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
+    <script>
+      document.addEventListener("DOMContentLoaded", () => {
+        const footerYearEl = document.getElementById("footer-year");
+        if (footerYearEl) {
+          // Updated Footer Text with Dynamic Year
+          footerYearEl.textContent = `Bitcoin Wallet Cheatsheet v2.2 - Secure Self-Custody Guide - © ${new Date().getFullYear()} David Veksler (Content Refined)`;
+        }
 
-    // JS for collapse toggle icons remains unchanged
-    const collapseElements = document.querySelectorAll('.collapse');
-    collapseElements.forEach(collapseEl => {
-        const button = document.querySelector(`.details-toggle[data-bs-target="#${collapseEl.id}"]`);
-        const icon = button ? button.querySelector('.bi') : null;
-        if (button && icon) {
+        // JS for collapse toggle icons remains unchanged
+        const collapseElements = document.querySelectorAll(".collapse");
+        collapseElements.forEach((collapseEl) => {
+          const button = document.querySelector(
+            `.details-toggle[data-bs-target="#${collapseEl.id}"]`
+          );
+          const icon = button ? button.querySelector(".bi") : null;
+          if (button && icon) {
             const updateIcon = (isShown) => {
-                icon.classList.toggle('bi-chevron-up', isShown);
-                icon.classList.toggle('bi-chevron-down', !isShown);
+              icon.classList.toggle("bi-chevron-up", isShown);
+              icon.classList.toggle("bi-chevron-down", !isShown);
             };
             // Set initial state based on whether the element is initially shown
-             // Check if the collapse element has the 'show' class on initial load
-            updateIcon(collapseEl.classList.contains('show'));
+            // Check if the collapse element has the 'show' class on initial load
+            updateIcon(collapseEl.classList.contains("show"));
 
             // Update icon when shown/hidden
-            collapseEl.addEventListener('show.bs.collapse', () => updateIcon(true));
-            collapseEl.addEventListener('hide.bs.collapse', () => updateIcon(false));
-        }
-    });
-});
-</script>
-</body>
-</html>
\ No newline at end of file
+            collapseEl.addEventListener("show.bs.collapse", () =>
+              updateIcon(true)
+            );
+            collapseEl.addEventListener("hide.bs.collapse", () =>
+              updateIcon(false)
+            );
+          }
+        });
+      });
+    </script>
+  </body>
+</html>