/* ============================================
   SHADOW PROTOCOL - Dark Cyberpunk Theme
   Security Education Website Styles
   ============================================ */

/* CSS Custom Properties - Color Palette */
:root {
    /* Primary Colors - Terminal Aesthetic */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #15151f;

    /* Accent Colors */
    --accent-green: #00ff88;
    --accent-green-dim: #00cc6a;
    --accent-cyan: #00d4ff;
    --accent-purple: #9d4edd;
    --accent-orange: #ff6b35;
    --accent-red: #ff3366;
    --accent-yellow: #ffd700;

    /* Text Colors */
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-dim: #606070;
    --text-bright: #ffffff;

    /* Danger Heat Map Colors */
    --danger-low: #00ff88;
    --danger-medium: #ffd700;
    --danger-high: #ff6b35;
    --danger-critical: #ff3366;

    /* Code Block Colors */
    --code-bg: #0d0d12;
    --code-border: #2a2a3a;
    --code-comment: #6a6a7a;
    --code-keyword: #ff79c6;
    --code-string: #f1fa8c;
    --code-function: #50fa7b;
    --code-variable: #8be9fd;

    /* UI Elements */
    --border-color: #2a2a3a;
    --border-glow: rgba(0, 255, 136, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-sans: 'Inter', 'Segoe UI', system-ui, sans-serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Layout */
    --sidebar-width: 280px;
    --content-max-width: 900px;
    --header-height: 60px;
}

/* ============================================
   BASE STYLES
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-green-dim);
}

/* Selection */
::selection {
    background: var(--accent-green);
    color: var(--bg-primary);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-bright);
}

h1 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.875rem;
    color: var(--accent-green);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
    margin-top: var(--spacing-xxl);
}

h3 {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    margin-top: var(--spacing-xl);
}

h4 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-green);
    text-decoration: underline;
}

strong {
    color: var(--text-bright);
    font-weight: 600;
}

em {
    color: var(--accent-purple);
    font-style: italic;
}

/* ============================================
   LAYOUT - MAIN STRUCTURE
   ============================================ */

.page-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 100;
    display: flex;
    flex-direction: column;
    /* CRITICAL: Prevent scroll from bleeding to main content */
    overscroll-behavior: contain;
    /* Isolate scroll context */
    isolation: isolate;
}

.sidebar-header {
    position: sticky;
    top: 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    z-index: 10;
    /* Prevent header from capturing scroll events */
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.sidebar-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-green);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sidebar-logo::before {
    content: '>';
    color: var(--accent-cyan);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
    /* NO overflow here - let parent .sidebar handle scrolling */
    overflow: visible;
}

.nav-section {
    margin-bottom: var(--spacing-lg);
}

.nav-section-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin-bottom: 2px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    border-radius: 6px;
    font-size: 0.9rem;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    color: var(--text-bright);
    text-decoration: none;
}

.nav-link.active {
    color: var(--accent-green);
    border-left-color: var(--accent-green);
}

.nav-link .danger-indicator {
    margin-left: auto;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.danger-indicator.low { background: var(--danger-low); }
.danger-indicator.medium { background: var(--danger-medium); }
.danger-indicator.high { background: var(--danger-high); }
.danger-indicator.critical { background: var(--danger-critical); }

/* Progress Bar */
.sidebar-progress {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.progress-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-bottom: var(--spacing-xs);
    display: flex;
    justify-content: space-between;
}

.progress-bar {
    height: 4px;
    background: var(--bg-primary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-cyan) 100%);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    isolation: isolate;
    /* Prevent scroll bleed from sidebar */
    overscroll-behavior: contain;
}

.content-header {
    position: sticky;
    top: 36px; /* Account for top bar height */
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.content-header.compact {
    padding: var(--spacing-sm) var(--spacing-xl);
}

.breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-dim);
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb .separator {
    margin: 0 var(--spacing-sm);
    color: var(--accent-green);
}

.content-body {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: var(--spacing-xxl);
}

/* ============================================
   COMPONENTS - CARDS & BOXES
   ============================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: border-color var(--transition-fast);
}

.card:hover {
    border-color: var(--accent-green-dim);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.card-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 1rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-bright);
    margin: 0;
}

/* Info Box Variants */
.info-box {
    padding: var(--spacing-md);
    border-radius: 6px;
    margin: var(--spacing-lg) 0;
    border-left: 4px solid;
}

.info-box.warning {
    background: rgba(255, 107, 53, 0.1);
    border-color: var(--accent-orange);
}

.info-box.danger {
    background: rgba(255, 51, 102, 0.1);
    border-color: var(--accent-red);
}

.info-box.success {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent-green);
}

.info-box.info {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-cyan);
}

.info-box-title {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.info-box.warning .info-box-title { color: var(--accent-orange); }
.info-box.danger .info-box-title { color: var(--accent-red); }
.info-box.success .info-box-title { color: var(--accent-green); }
.info-box.info .info-box-title { color: var(--accent-cyan); }

/* ============================================
   CODE BLOCKS
   ============================================ */

pre {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 6px;
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    position: relative;
}

pre::before {
    content: attr(data-language);
    position: absolute;
    top: 0;
    right: 0;
    background: var(--bg-tertiary);
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 0 6px 0 6px;
    text-transform: uppercase;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Inline code */
p code, li code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent-cyan);
    font-size: 0.85em;
}

/* Syntax Highlighting */
.code-comment { color: var(--code-comment); }
.code-keyword { color: var(--code-keyword); }
.code-string { color: var(--code-string); }
.code-function { color: var(--code-function); }
.code-variable { color: var(--code-variable); }
.code-number { color: var(--accent-purple); }
.code-operator { color: var(--accent-orange); }

/* Copy Button */
.code-copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0;
}

pre:hover .code-copy-btn {
    opacity: 1;
}

.code-copy-btn:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
    border-color: var(--accent-green);
}

/* ============================================
   FLOWCHARTS - ASCII & CSS
   ============================================ */

.flowchart {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    overflow-x: auto;
}

.flowchart-title {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-green);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ASCII Art Flowchart */
.ascii-flowchart {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.4;
    white-space: pre;
    color: var(--text-secondary);
}

.ascii-flowchart .node {
    color: var(--accent-cyan);
}

.ascii-flowchart .arrow {
    color: var(--accent-green);
}

.ascii-flowchart .label {
    color: var(--text-primary);
}

/* CSS Flowchart */
.css-flowchart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.flow-node {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md) var(--spacing-lg);
    min-width: 200px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.flow-node:hover {
    border-color: var(--accent-green);
    box-shadow: 0 0 20px var(--border-glow);
    transform: translateY(-2px);
}

.flow-node.active {
    border-color: var(--accent-green);
    background: rgba(0, 255, 136, 0.1);
}

.flow-node-title {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-bright);
}

.flow-node-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.flow-arrow {
    font-family: var(--font-mono);
    color: var(--accent-green);
    font-size: 1.2rem;
}

/* Horizontal Flow */
.css-flowchart.horizontal {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.css-flowchart.horizontal .flow-arrow {
    transform: rotate(-90deg);
}

/* Branching Flow */
.flow-branch {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
}

.flow-branch-option {
    flex: 1;
    max-width: 300px;
}

/* ============================================
   DANGER HEAT MAP
   ============================================ */

.danger-scale {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: 6px;
    margin: var(--spacing-lg) 0;
}

.danger-level {
    flex: 1;
    padding: var(--spacing-sm);
    text-align: center;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.danger-level.low {
    background: rgba(0, 255, 136, 0.2);
    color: var(--danger-low);
}

.danger-level.medium {
    background: rgba(255, 215, 0, 0.2);
    color: var(--danger-medium);
}

.danger-level.high {
    background: rgba(255, 107, 53, 0.2);
    color: var(--danger-high);
}

.danger-level.critical {
    background: rgba(255, 51, 102, 0.2);
    color: var(--danger-critical);
}

/* Section Danger Indicator */
.section-danger {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.section-danger.low {
    background: rgba(0, 255, 136, 0.15);
    color: var(--danger-low);
}

.section-danger.medium {
    background: rgba(255, 215, 0, 0.15);
    color: var(--danger-medium);
}

.section-danger.high {
    background: rgba(255, 107, 53, 0.15);
    color: var(--danger-high);
}

.section-danger.critical {
    background: rgba(255, 51, 102, 0.15);
    color: var(--danger-critical);
}

/* ============================================
   TABLES
   ============================================ */

table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    font-size: 0.9rem;
}

thead {
    background: var(--bg-tertiary);
}

th {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-green);
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
}

tr:hover {
    background: var(--bg-card);
}

/* ============================================
   LISTS
   ============================================ */

ul, ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

li {
    margin-bottom: var(--spacing-sm);
}

li::marker {
    color: var(--accent-green);
}

/* Custom styled lists */
.check-list {
    list-style: none;
    padding-left: 0;
}

.check-list li {
    padding-left: var(--spacing-lg);
    position: relative;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: bold;
}

.x-list {
    list-style: none;
    padding-left: 0;
}

.x-list li {
    padding-left: var(--spacing-lg);
    position: relative;
}

.x-list li::before {
    content: '✗';
    position: absolute;
    left: 0;
    color: var(--accent-red);
    font-weight: bold;
}

/* ============================================
   TOOLTIPS & GLOSSARY
   ============================================ */

.glossary-term {
    border-bottom: 1px dashed var(--accent-cyan);
    cursor: help;
    position: relative;
}

.glossary-term:hover .tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 6px;
    font-size: 0.85rem;
    white-space: nowrap;
    max-width: 300px;
    white-space: normal;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border-color);
}

/* ============================================
   BUTTONS & INTERACTIVE ELEMENTS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-green);
    color: var(--bg-primary);
    border-color: var(--accent-green);
}

.btn-primary:hover {
    background: var(--accent-green-dim);
    box-shadow: 0 0 20px var(--border-glow);
    text-decoration: none;
}

.btn-secondary {
    background: transparent;
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    text-decoration: none;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-ghost:hover {
    color: var(--text-bright);
    border-color: var(--text-secondary);
    text-decoration: none;
}

/* ============================================
   CHAPTER NAVIGATION
   ============================================ */

.chapter-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.nav-button {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    transition: all var(--transition-normal);
    min-width: 180px;
}

.nav-button:hover {
    border-color: var(--accent-green);
    background: var(--bg-secondary);
    transform: translateY(-2px);
    text-decoration: none;
}

.nav-button.prev {
    align-items: flex-start;
}

.nav-button.next {
    align-items: flex-end;
    margin-left: auto;
}

.nav-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    margin-bottom: 0.25rem;
}

.nav-title {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-green);
    font-weight: 500;
}

.nav-button:hover .nav-title {
    color: var(--text-bright);
}

/* Mobile responsive */
@media (max-width: 600px) {
    .chapter-nav {
        flex-direction: column;
    }

    .nav-button {
        min-width: 100%;
    }

    .nav-button.next {
        align-items: flex-start;
        margin-left: 0;
    }
}

/* ============================================
   TERMINAL ANIMATION
   ============================================ */

.terminal {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    overflow: hidden;
    margin: var(--spacing-lg) 0;
}

.terminal-header {
    background: var(--bg-tertiary);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27ca40; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-left: var(--spacing-md);
}

.terminal-body {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.terminal-prompt {
    color: var(--accent-green);
}

.terminal-command {
    color: var(--text-primary);
}

.terminal-output {
    color: var(--text-secondary);
}

/* Typing animation */
.typing {
    overflow: hidden;
    border-right: 2px solid var(--accent-green);
    animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--accent-green); }
}

/* ============================================
   ATTACK CHAIN VISUALIZATION
   ============================================ */

.attack-chain {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin: var(--spacing-xl) 0;
}

.chain-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chain-node {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.chain-node:hover {
    border-color: var(--accent-green);
    transform: scale(1.05);
}

.chain-node.active {
    border-color: var(--accent-green);
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent-green);
}

.chain-arrow {
    color: var(--accent-green);
    font-size: 1.2rem;
}

/* ============================================
   PAGE-SPECIFIC LAYOUTS
   ============================================ */

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.hero-logo {
    margin-bottom: var(--spacing-lg);
}

.hero-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--accent-green);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

/* Grid Layout */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Two Column Layout */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.two-col.offense-defense .col-offense {
    border-right: 1px solid var(--border-color);
    padding-right: var(--spacing-xl);
}

@media (max-width: 900px) {
    .two-col {
        grid-template-columns: 1fr;
    }

    .two-col.offense-defense .col-offense {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: var(--spacing-xl);
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }

    .content-body {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-toggle {
        display: block;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--accent-green);
    border: none;
    border-radius: 50%;
    color: var(--bg-primary);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 200;
    box-shadow: 0 4px 20px var(--shadow-color);
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .sidebar,
    .mobile-menu-toggle,
    .code-copy-btn {
        display: none !important;
    }

    .main-content {
        margin-left: 0;
    }

    body {
        background: white;
        color: black;
    }

    pre {
        border: 1px solid #ccc;
        background: #f5f5f5;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-mono { font-family: var(--font-mono); }
.text-dim { color: var(--text-dim); }
.text-green { color: var(--accent-green); }
.text-cyan { color: var(--accent-cyan); }
.text-orange { color: var(--accent-orange); }
.text-red { color: var(--accent-red); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   SEARCH OVERLAY (Site-wide)
   ============================================ */

/* ============================================
   TOP BAR - Version, Home, Search
   ============================================ */

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 36px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    z-index: 500;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.top-bar-left a {
    color: var(--accent-cyan);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
}

.top-bar-left a:hover {
    color: var(--accent-green);
}

.top-bar-version {
    color: var(--text-dim);
    padding: 2px 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.top-bar-search {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 10px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.top-bar-search:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.top-bar-search kbd {
    background: var(--bg-secondary);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 0.7rem;
}

/* Adjust layout for top bar */
.sidebar {
    top: 36px;
    height: calc(100vh - 36px);
}

.main-content {
    padding-top: 36px; /* Just account for top bar */
}

.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
}

.search-overlay.active {
    display: flex;
}

.search-container {
    background: var(--bg-secondary);
    border: 1px solid var(--accent-green);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 0 40px rgba(0, 255, 136, 0.2);
}

.search-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

#site-search-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    outline: none;
}

#site-search-input::placeholder {
    color: var(--text-dim);
}

.search-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 var(--spacing-sm);
}

.search-close:hover {
    color: var(--accent-red);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    display: block;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    transition: background var(--transition-fast);
}

.search-result-item:hover {
    background: var(--bg-tertiary);
}

.search-result-title {
    display: block;
    color: var(--accent-green);
    font-family: var(--font-mono);
    font-weight: 500;
    margin-bottom: 4px;
}

.search-result-keywords {
    display: block;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.search-hint {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-dim);
    font-size: 0.8rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.search-hint-results,
.search-no-results {
    padding: var(--spacing-lg);
    color: var(--text-dim);
    text-align: center;
}

/* ============================================
   GLOSSARY SEARCH
   ============================================ */

.glossary-search {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

#glossary-filter {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1rem;
    outline: none;
}

#glossary-filter:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.2);
}

#glossary-filter::placeholder {
    color: var(--text-dim);
}

#glossary-count {
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    white-space: nowrap;
}

/* ============================================
   SEARCH BUTTON (optional - add to header)
   ============================================ */

.search-trigger {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.search-trigger:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.search-trigger kbd {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Top bar mobile adjustments */
@media (max-width: 768px) {
    .top-bar {
        padding: 0 var(--spacing-sm);
    }

    .top-bar-left a span:first-child {
        display: none;
    }

    .top-bar-search span {
        display: none;
    }

    .sidebar.open {
        top: 36px;
        height: calc(100vh - 36px);
    }
}

/* ============================================
   NEW BADGE - for highlighting new content
   ============================================ */

.badge-new {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    color: var(--bg-primary);
    font-size: 0.65rem;
    font-weight: 700;
    font-family: var(--font-mono);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    vertical-align: middle;
    animation: pulse-new 2s ease-in-out infinite;
}

@keyframes pulse-new {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Chapter link - for cross-references between chapters */
.chapter-link {
    color: var(--accent-orange);
    text-decoration: none;
    border-bottom: 1px dashed var(--accent-orange);
    transition: all var(--transition-fast);
}

.chapter-link:hover {
    color: var(--accent-yellow);
    border-bottom-color: var(--accent-yellow);
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.5);
}