/* ============================================
   Claude Code Guide Landing Page
   Dark Mode Styles
   ============================================ */

/* CSS Custom Properties */
:root {
    /* ===== LIGHT MODE (default) ===== */
    /* Page backgrounds - warm off-white layering */
    --bg-primary: #fafbfc;      /* main page bg (not pure white) */
    --bg-secondary: #f4f6f9;    /* section alternates */
    --bg-tertiary: #e8ecf0;     /* code blocks, inputs */

    /* Elevated surfaces - pure white reserved for cards */
    --surface-elevated: #ffffff;

    /* Borders - stronger visibility */
    --border: #d1d9e0;          /* visible borders */
    --border-light: #e3e8ef;    /* subtle dividers */

    /* Text (unchanged - already excellent) */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    /* Accent (unchanged - brand identity) */
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --accent-secondary: #4f46e5;
    --accent-secondary-hover: #6366f1;

    /* Shadows - NEW elevation system */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-header: 0 1px 3px rgba(0, 0, 0, 0.06);  /* subtle header shadow */

    /* Header backdrop */
    --header-bg: rgba(255, 255, 255, 0.95);

    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 5rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== DARK MODE (toggle only) ===== */
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #9ca3af;  /* WCAG AA compliant (4.8:1 contrast) */
    --text-muted: #9ca3af;
    --border: #30363d;
    --border-light: #21262d;

    /* Elevated surfaces - use secondary in dark mode */
    --surface-elevated: #161b22;

    /* Shadows - darker for dark mode */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-header: 0 1px 3px rgba(0, 0, 0, 0.5);  /* header shadow for dark mode */

    --header-bg: rgba(13, 17, 23, 0.95);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

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

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

code {
    font-family: var(--font-mono);
    background-color: var(--bg-tertiary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

kbd {
    display: inline-block;
    padding: 0.2em 0.5em;
    font-family: var(--font-mono);
    font-size: 0.85em;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background-color: var(--accent-secondary);
    color: #ffffff;
    font-weight: 600;
    padding: 0.875rem 1.75rem;
    border: none;
    filter: drop-shadow(0 4px 12px rgba(79, 70, 229, 0.3));
    transition: transform 0.2s var(--ease-out-back),
                filter 0.2s ease;
}

.btn-primary:hover {
    background-color: var(--accent-secondary-hover);
    color: #ffffff;
    transform: translateY(-2px) scale(1.02);
    filter: drop-shadow(0 6px 20px rgba(79, 70, 229, 0.4));
}

.btn-primary:active {
    transform: translateY(0) scale(1);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    transition: border-color 0.15s ease, color 0.15s ease;
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-github-star {
    background: linear-gradient(135deg, #24292e 0%, #1a1e22 100%);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-github-star::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-github-star:hover::before {
    left: 100%;
}

.btn-github-star:hover {
    background: linear-gradient(135deg, #2f363d 0%, #24292e 100%);
    border-color: rgba(255, 215, 0, 0.5);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 24px rgba(255, 215, 0, 0.2),
                0 4px 12px rgba(36, 41, 46, 0.4);
}

.btn-github-star:hover svg {
    color: #ffd700;
    transform: scale(1.2) rotate(72deg);
}

.btn-github-star:active {
    transform: translateY(0) scale(1);
}

.btn-github-star svg {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

.btn-github-text {
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

@media (max-width: 768px) {
    .btn-github-text {
        display: none;
    }

    .btn-github-star {
        padding: 0.5rem;
    }
}

.btn-outline {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-outline:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--header-bg);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-header);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.logo:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-family: var(--font-mono);
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--text-primary);
    text-decoration: none;
}

/* Nav actions separator */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-left: 1.5rem;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
}

/* Cross-link to sibling guide */
.nav-crosslink {
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: background 0.2s;
    margin-left: 0.5rem;
}
.nav-crosslink:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}
.nav-crosslink-label {
    opacity: 0.7;
}

/* Theme toggle button */
.theme-toggle {
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
}

.theme-toggle svg {
    position: absolute;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Light mode: show moon, hide sun */
.theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}
.theme-toggle .icon-moon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* Dark mode: show sun, hide moon */
[data-theme="dark"] .theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0) scale(1);
}
[data-theme="dark"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

/* Mobile Menu Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-xs);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: var(--space-4xl) 0;
    text-align: center;
    background: linear-gradient(180deg,
        var(--bg-secondary) 0%,
        var(--bg-primary) 100%
    );
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-logo {
    width: 120px;
    height: auto;
    margin-bottom: var(--space-lg);
    filter: drop-shadow(0 0 20px rgba(88, 166, 255, 0.3));
}

@media (max-width: 480px) {
    .hero-logo {
        width: 80px;
    }
}

.hero-title {
    font-size: clamp(2.75rem, 6vw + 0.5rem, 4.5rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.hero-stats {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xl);
}

.hero-ctas {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

/* Hero CTA Enhancement - Pulse animation for conversion */
.hero .btn-primary {
    font-size: 1.1rem;
    padding: 1rem 2rem;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(79, 70, 229, 0.4);
    }
    50% {
        box-shadow: 0 0 30px rgba(79, 70, 229, 0.6);
    }
}

.hero-badges {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-badges img {
    height: 28px;
}

/* CSS Badges - Replace shields.io external images */
.badge {
    display: inline-flex;
    align-items: center;
    height: 28px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    border-radius: 4px;
    overflow: hidden;
    text-decoration: none;
    transition: transform 0.2s ease, filter 0.2s ease;
}

.badge:hover {
    transform: translateY(-1px);
    filter: brightness(1.1);
}

.badge-label,
.badge-value {
    padding: 0 7px;
    height: 100%;
    display: flex;
    align-items: center;
}

.badge-label {
    background-color: #555;
    color: #fff;
}

.badge-value {
    color: #fff;
    font-weight: 700;
}

/* Badge variants */
.badge-stars .badge-label {
    background-color: #555;
}
.badge-stars .badge-value {
    background-color: #4c1;
}

.badge-lines .badge-label {
    background-color: #555;
}
.badge-lines .badge-value {
    background-color: #8b5cf6;
}

.badge-templates .badge-label {
    background-color: #555;
}
.badge-templates .badge-value {
    background-color: #4c1;
}

.badge-quiz .badge-label {
    background-color: #555;
}
.badge-quiz .badge-value {
    background-color: #fe7d37;
}

/* Hero share buttons */
.hero-share {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
    justify-content: center;
}

.share-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.share-btn:hover {
    background: var(--accent);
    color: white;
    text-decoration: none;
}

/* Stats styling */
.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--space-4xl) 0;
    background-color: var(--bg-primary);
}

/* Explicit alternating sections */
.section--alt {
    background-color: var(--bg-secondary);
}

/* ============================================
   Interactive Onboarding Hero
   ============================================ */
.onboarding-hero {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-bottom: 1px solid var(--border);
}

.onboarding-hero .container {
    text-align: center;
}

.onboarding-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 20px;
    margin-bottom: var(--space-lg);
    text-align: center;
}

.onboarding-hero .section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.onboarding-command {
    max-width: 900px;
    margin: 0 auto var(--space-2xl);
}

.code-block.featured {
    border: 2px solid var(--accent);
    box-shadow: 0 0 30px rgba(88, 166, 255, 0.15);
}

.code-block.featured .code-header {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
}

.onboarding-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.onboarding-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    text-align: left;
}

.feature-num {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    background-color: var(--accent);
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.onboarding-feature p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.onboarding-feature strong {
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .onboarding-features {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .onboarding-features {
        grid-template-columns: 1fr;
    }

    .onboarding-feature {
        justify-content: center;
        text-align: left;
    }
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    text-align: center;
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    font-size: 1.1rem;
}

/* ============================================
   TL;DR Section
   ============================================ */
.tldr-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--space-xl);
}

.tldr-table {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    border-collapse: collapse;
}

.tldr-table th,
.tldr-table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.tldr-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tldr-table td:last-child {
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Code Blocks */
.code-block {
    background-color: var(--bg-tertiary);  /* #e8ecf0 - darker gray */
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: var(--space-lg) auto;
    max-width: 700px;
    border: 1px solid var(--border);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.04);  /* inset shadow */
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.code-filename {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.copy-btn {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
    min-height: 44px;  /* WCAG touch target */
    min-width: 44px;
}

.copy-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.copy-btn.copied {
    background-color: var(--accent-secondary);
    border-color: var(--accent-secondary);
    color: #ffffff;
}

.code-block pre {
    padding: var(--space-md);
    overflow-x: auto;
    margin: 0;
}

.code-block code {
    background: none;
    padding: 0;
    font-size: 0.9rem;
    line-height: 1.6;
    display: block;
    white-space: pre;
}

.code-hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--space-md);
}

/* CLAUDE.md Collapsible */
.claude-md-details {
    max-width: 700px;
    margin: var(--space-xl) auto 0;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

.claude-md-details summary {
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.claude-md-details summary::-webkit-details-marker {
    display: none;
}

.claude-md-details summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--text-muted);
}

.claude-md-details[open] summary::after {
    content: '-';
}

.claude-md-details[open] summary {
    border-bottom: 1px solid var(--border);
}

.claude-md-details .code-block {
    margin: var(--space-md);
    border-radius: var(--border-radius);
}

.claude-md-details .code-hint {
    padding: 0 var(--space-md) var(--space-md);
}

/* ============================================
   Why This Guide Section - Before/After Comparison
   ============================================ */

/* Architecture Visual */
.architecture-visual {
    margin: var(--space-xl) auto var(--space-2xl);
    max-width: 700px;
    text-align: center;
}

.architecture-visual figure {
    margin: 0;
}

.architecture-visual img {
    width: 100%;
    max-width: 700px;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.architecture-visual figcaption {
    margin-top: var(--space-md);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: 1.6;
}

.architecture-visual figcaption strong {
    color: var(--text);
}

.architecture-visual figcaption a {
    color: var(--primary);
}

.comparison-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.comparison-card {
    background-color: var(--surface-elevated);  /* pure white */
    border: 2px solid var(--border);            /* thicker border */
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.comparison-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.comparison-without {
    border-left: 4px solid #f87171;  /* red accent */
}

.comparison-with {
    border-left: 4px solid #34d399;  /* green accent */
    box-shadow: var(--shadow-md);    /* more elevation */
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border);
}

.comparison-icon {
    font-size: 1.5rem;
}

.comparison-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.comparison-without .comparison-header h3 {
    color: #f85149;
}

.comparison-with .comparison-header h3 {
    color: #238636;
}

.comparison-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comparison-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.status-icon {
    flex-shrink: 0;
    font-weight: 700;
    font-size: 0.9rem;
}

.status-icon.bad {
    color: #f85149;
}

.status-icon.good {
    color: #238636;
}

@media (max-width: 768px) {
    .comparison-cards {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Features Section
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);            /* stronger border */
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);               /* subtle lift */
    transition: transform 0.25s var(--ease-out-back),
                box-shadow 0.25s ease,
                border-color var(--transition-normal);
    position: relative;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);       /* pronounced hover */
}

/* Featured card */
.feature-card.featured {
    border-color: var(--accent);
}

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent-secondary);
    color: white;
    padding: 0.25rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.feature-card-link {
    text-decoration: none;
    cursor: pointer;
}

.feature-card-link:hover {
    border-color: var(--accent);
    text-decoration: none;
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(88, 166, 255, 0.15);
}

.feature-card-link .feature-meta {
    color: var(--accent);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: block;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

.feature-meta {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    background-color: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
}

/* ============================================
   Examples Showcase Section
   ============================================ */
.section-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--accent-secondary) 0%, #22c55e 100%);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 20px;
    margin-bottom: var(--space-md);
}

.examples-showcase {
    background-color: var(--bg-secondary);
}

.examples-grid {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: var(--space-lg) !important;
    margin-bottom: var(--space-xl);
}

.example-category {
    display: flex !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    text-align: center;
    text-decoration: none !important;
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: all var(--transition-normal);
    min-height: 180px;
}

.example-category:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);       /* pronounced hover */
    text-decoration: none;
}

.example-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.example-category h3 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.example-category p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.example-count {
    display: inline-block;
    background-color: var(--accent-secondary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
}

.examples-cta {
    text-align: center;
}

@media (max-width: 900px) {
    .examples-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 500px) {
    .examples-grid {
        grid-template-columns: 1fr !important;
    }

    .example-category {
        min-height: auto;
        padding: var(--space-lg);
    }
}

/* ============================================
   Paths Section
   ============================================ */
.paths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.path-card {
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: all var(--transition-normal);
}

.path-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);       /* pronounced hover */
}

.path-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(88, 166, 255, 0.1);
}

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

.path-icon {
    font-size: 1.5rem;
}

.path-header h3 {
    font-size: 1.2rem;
}

.path-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-lg);
}

.path-steps {
    padding-left: var(--space-lg);
    color: var(--text-secondary);
}

.path-steps li {
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
}

.path-steps li::marker {
    color: var(--text-muted);
}

/* ============================================
   Golden Rules Section
   ============================================ */
.golden-rules {
    /* Background controlled by section--alt */
}

.rules-list {
    max-width: 800px;
    margin: 0 auto;
}

.rule {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-md);
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.rule:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.rule-number {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    background-color: var(--accent);
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 1.25rem;
    border-radius: 50%;
}

.rule-content h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.rule-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   Level Up Section
   ============================================ */
.level-up {
    /* Background controlled by section--alt */
}

.levelup-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 800px;
    margin: 0 auto;
}

.levelup-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: all var(--transition-normal);
}

.levelup-card:hover {
    border-color: var(--accent-secondary);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.levelup-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.levelup-content {
    flex: 1;
}

.levelup-content h3 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.levelup-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.levelup-content code {
    background-color: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.levelup-arrow {
    font-size: 1.25rem;
    color: var(--accent-secondary);
    flex-shrink: 0;
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--transition-fast);
}

.levelup-card:hover .levelup-arrow {
    opacity: 1;
    transform: translateX(0);
}

@media (max-width: 640px) {
    .levelup-card {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
    }

    .levelup-card:hover {
        transform: translateY(-4px);
    }

    .levelup-arrow {
        display: none;
    }
}

/* ============================================
   Community Section
   ============================================ */

/* French Community Callout */
.fr-callout {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--accent);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-2xl);
}

.fr-flag {
    font-size: 2rem;
    flex-shrink: 0;
}

.fr-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.fr-content p:first-child {
    margin-bottom: var(--space-sm);
}

.fr-content strong {
    color: var(--text-primary);
}

@media (max-width: 480px) {
    .fr-callout {
        flex-direction: column;
        gap: var(--space-md);
    }
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.community-card {
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: all var(--transition-normal);
}

.community-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);       /* pronounced hover */
}

.community-card.highlight {
    border-color: var(--accent);
    grid-column: span 1;
}

.community-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: block;
}

.community-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.community-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-lg);
}

.community-card .link {
    font-size: 0.95rem;
}

.author-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow-sm);               /* subtle elevation */
}

.author-card-expanded {
    max-width: 700px;
    flex-direction: row;
    align-items: flex-start;
    padding: var(--space-xl);
}

.author-photo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border);
    flex-shrink: 0;
}

.author-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.author-bio {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 600px) {
    .author-card-expanded {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .author-details {
        align-items: center;
    }

    .author-links {
        justify-content: center;
    }
}

.author-info p {
    margin: 0;
    font-size: 0.95rem;
}

.author-info p:first-child {
    color: var(--text-primary);
}

.author-info p:last-child {
    color: var(--text-secondary);
}

.author-links {
    display: flex;
    gap: var(--space-md);
}

.author-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.author-links a:hover {
    color: var(--accent);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);               /* subtle elevation */
}

.faq-item[open] {
    box-shadow: var(--shadow-md);               /* more elevation when open */
    border-color: var(--accent);
}

.faq-item summary {
    padding: var(--space-lg);
    cursor: pointer;
    font-weight: 500;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
    content: '-';
}

.faq-item[open] summary {
    border-bottom: 1px solid var(--border);
}

.faq-item p {
    padding: var(--space-lg);
    color: var(--text-secondary);
    margin: 0;
}

/* Accordion animation */
details[open] > *:not(summary) {
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-cta {
    text-align: center;
    padding: var(--space-2xl) var(--space-xl);
    margin-bottom: var(--space-2xl);
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border);
}

.footer-cta h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.footer-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-sm);
}

.footer-section a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-section a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-sm);
}

.footer-bottom .version {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablet */
@media (max-width: 768px) {
    .section {
        padding: var(--space-2xl) 0;
    }

    .hero {
        padding: var(--space-2xl) 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    /* Hamburger menu for tablet/mobile */
    .menu-toggle {
        display: block;
        order: 3;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        height: calc(100vh - 60px);
        height: calc(100dvh - 60px);
        background: #0a0a0f;
        background: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--space-xl);
        gap: var(--space-lg);
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: var(--space-sm) var(--space-lg);
    }

    .nav-links .search-trigger {
        order: -1;
        width: auto;
        padding: var(--space-sm) var(--space-lg);
    }

    .nav-links .nav-crosslink {
        display: block;
        padding: var(--space-sm) var(--space-lg);
        margin-left: 0;
    }

    .features-grid,
    .paths-grid,
    .community-grid {
        grid-template-columns: 1fr;
    }

    .rule {
        flex-direction: column;
        text-align: center;
    }

    .rule-number {
        margin: 0 auto;
    }

    .path-card.featured {
        order: -1;
    }
}

/* Mobile */
@media (max-width: 480px) {
    /* Fix horizontal scroll */
    html, body {
        overflow-x: hidden;
    }

    .container {
        padding: 0 var(--space-md);
        max-width: 100%;
    }

    /* Mobile Header */
    .nav {
        padding: var(--space-sm) 0;
    }

    .logo {
        font-size: 0.9rem;
    }

    .logo-text {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-tagline {
        font-size: 1rem;
    }

    .hero-ctas {
        flex-direction: column;
    }

    .hero-ctas .btn {
        width: 100%;
    }

    .hero-badges {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .code-block pre {
        padding: var(--space-sm);
        overflow-x: auto;
    }

    .code-block code {
        font-size: 0.8rem;
    }

    .author-card {
        flex-direction: column;
        text-align: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Scroll progress bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, #a855f7 100%);
    z-index: 1001;
    width: 0%;
    transition: width 0.1s linear;
}

/* Fade-in animation for sections */
/* Fallback si JS échoue - sections visibles par défaut */
.section {
    opacity: 1;
    transform: none;
}

/* JS loaded - réactiver animations */
.js-loaded .section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.js-loaded .section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hero should be visible immediately */
.hero {
    opacity: 1;
    transform: none;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg-primary);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    z-index: 1000;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: var(--space-md);
    outline: none;
}

/* Focus states for accessibility */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* Links hover enhancement */
a:not(.btn):not(.feature-card-link):not(.levelup-card):not(.example-category):hover {
    color: var(--accent);
}

/* ============================================
   What's New / Changelog Section
   ============================================ */
.changelog-container {
    max-width: 800px;
    margin: 0 auto;
}

.changelog-loading {
    text-align: center;
    color: var(--text-muted);
    padding: var(--space-xl);
}

.changelog-error {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--space-lg);
}

.changelog-release {
    background-color: var(--surface-elevated);  /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--space-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: all var(--transition-normal);
}

.changelog-release:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.changelog-version {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent);
    font-size: 1.1rem;
}

.changelog-version-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.changelog-version-link:hover {
    opacity: 0.8;
}

.changelog-version-link:hover .changelog-version {
    text-decoration: underline;
}

.changelog-version-link .external-link-icon {
    color: var(--text-muted);
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.changelog-version-link:hover .external-link-icon {
    opacity: 1;
}

.changelog-date {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.changelog-content {
    padding: var(--space-lg);
}

.changelog-section {
    margin-bottom: var(--space-md);
}

.changelog-section:last-child {
    margin-bottom: 0;
}

.changelog-section-title {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.changelog-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.changelog-items li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.changelog-items li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

.changelog-items li strong {
    color: var(--text-primary);
}

.changelog-items .item-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.changelog-items .item-desc::before {
    content: ' — ';
    color: var(--text-muted);
}

.changelog-items .more-items {
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.85rem;
}

.changelog-items .more-items::before {
    content: '';
}

@media (max-width: 480px) {
    .changelog-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .changelog-content {
        padding: var(--space-md);
    }
}

/* ============================================
   Comparison Table Section
   ============================================ */
.comparison-table .table-wrapper {
    overflow-x: auto;
    margin: var(--space-xl) 0;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border);
}

.comparison-feature-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    background-color: var(--bg-secondary);
}

.comparison-feature-table th,
.comparison-feature-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.comparison-feature-table th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.comparison-feature-table th:first-child {
    background-color: var(--bg-tertiary);
    position: sticky;
    left: 0;
    z-index: 1;
}

.comparison-feature-table td:first-child {
    background-color: var(--bg-secondary);
    font-weight: 500;
    position: sticky;
    left: 0;
    z-index: 1;
}

.comparison-feature-table tbody tr:hover {
    background-color: rgba(88, 166, 255, 0.05);
}

.comparison-feature-table tbody tr:last-child td {
    border-bottom: none;
}

.feature-yes {
    color: #238636;
    font-weight: 600;
}

.feature-no {
    color: #8b949e;
}

.feature-partial {
    color: #f59e0b;
    font-weight: 500;
}

.comparison-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--accent);
}

@media (max-width: 768px) {
    .comparison-feature-table th,
    .comparison-feature-table td {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
    }
}

/* ============================================
   Prompt Formula Section
   ============================================ */
.formula-box {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.05) 0%, rgba(168, 85, 247, 0.05) 100%);
    border: 2px solid var(--accent);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    max-width: 700px;
    margin: 0 auto;
}

.formula-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.formula-item {
    text-align: center;
    padding: var(--space-md);
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.formula-label {
    display: block;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.formula-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.formula-example {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--space-md);
}

.formula-example h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.formula-example pre {
    margin: 0;
    background-color: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    line-height: 1.6;
    overflow-x: auto;
}

.formula-example code {
    background: none;
    padding: 0;
}

@media (max-width: 640px) {
    .formula-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Context Zones Visual (Cheatsheet)
   ============================================ */
.context-zones {
    margin: var(--space-lg) 0;
}

.context-bar {
    display: flex;
    height: 20px;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.context-zone {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: white;
}

.zone-green {
    background-color: #22c55e;
    width: 50%;
}

.zone-yellow {
    background-color: #f59e0b;
    width: 20%;
}

.zone-orange {
    background-color: #f97316;
    width: 20%;
}

.zone-red {
    background-color: #ef4444;
    width: 10%;
}

.context-legend {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xs);
    font-size: 0.8rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-dot.green { background-color: #22c55e; }
.legend-dot.yellow { background-color: #f59e0b; }
.legend-dot.orange { background-color: #f97316; }
.legend-dot.red { background-color: #ef4444; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .section {
        opacity: 1;
        transform: none;
    }
}

/* ===== GLOBAL SEARCH MODAL ===== */

.search-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 5vh 1rem;
}

.search-modal[hidden] {
    display: none;
}

.search-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
}

.search-modal-content {
    position: relative;
    width: 100%;
    max-width: 560px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 16px 70px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

/* Search Input */
.search-input-wrapper {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    gap: 0.75rem;
}

.search-icon {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

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

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

/* Search Results */
.search-results {
    max-height: 60vh;
    overflow-y: auto;
    padding: 0.5rem;
    list-style: none;
    margin: 0;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    min-height: 48px;
    transition: background-color 0.15s ease;
}

.search-result-item:hover,
.search-result-item[aria-selected="true"] {
    background: var(--bg-primary);
}

.search-result-type {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    min-width: 80px;
    flex-shrink: 0;
}

.search-result-title {
    color: var(--text-primary);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-category {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

/* No results */
.search-no-results {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    list-style: none;
}

/* Header search trigger */
.search-trigger {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease;
    font-size: 0.875rem;
    min-height: 44px;  /* WCAG touch target */
}

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

.search-trigger svg {
    width: 16px;
    height: 16px;
}

/* Keyboard hints */
.search-kbd {
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
}

@media (max-width: 768px) {
    .search-kbd {
        display: none;
    }

    .search-trigger {
        padding: 0.5rem;
    }
}

/* Visually hidden but accessible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Claude Code Version Banner
   ============================================ */
.cc-version-banner {
    background: linear-gradient(90deg, rgba(88, 166, 255, 0.1) 0%, rgba(35, 134, 54, 0.1) 100%);
    border-bottom: 1px solid var(--border);
    padding: var(--space-sm) 0;
}

.cc-version-banner .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.cc-version-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--bg-tertiary);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
}

.cc-version-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.cc-version-link:hover {
    color: var(--accent);
}

/* ============================================
   Claude Code Releases Section
   ============================================ */
.cc-releases {
    /* Background controlled by section--alt or default */
}

.releases-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.release-card {
    background: var(--surface-elevated);        /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

.release-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.release-latest {
    border-color: var(--accent-secondary);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(35, 134, 54, 0.1) 100%);
}

.release-latest::before {
    content: "Latest";
    display: inline-block;
    background: var(--accent-secondary);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-bottom: var(--space-sm);
}

.release-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border);
}

.release-version {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.release-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.release-highlights {
    list-style: none;
    padding: 0;
    margin: 0;
}

.release-highlights li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.release-highlights li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.release-highlights li:last-child {
    margin-bottom: 0;
}

.release-highlights code {
    background: var(--bg-tertiary);
    color: var(--accent);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
}

/* Breaking Changes Box */
.breaking-changes {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.3);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.breaking-changes h3 {
    color: #f85149;
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.breaking-changes ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.breaking-changes li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(248, 81, 73, 0.2);
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.breaking-changes li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.breaking-changes code {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
}

.breaking-badge {
    display: inline-block;
    background: #f85149;
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    margin-right: var(--space-sm);
}

/* Releases Link */
.releases-link {
    display: flex;
    justify-content: center;
}

.releases-link .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Responsive - Releases */
@media (max-width: 768px) {
    .releases-timeline {
        grid-template-columns: 1fr;
    }

    .cc-version-banner .container {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .release-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }
}

/* ============================================
   AI Ecosystem Section
   ============================================ */
.ecosystem-intro {
    text-align: center;
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--border);
}

.ecosystem-intro h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.ecosystem-intro p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.ecosystem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.ecosystem-card {
    background: var(--surface-elevated);        /* pure white */
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
    text-decoration: none;
    display: block;
}

.ecosystem-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow-card-hover);       /* pronounced hover */
    text-decoration: none;
}

.ecosystem-card-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.ecosystem-card-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.ecosystem-card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

.ecosystem-card-usecase {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 500;
}

.ecosystem-card-highlight {
    position: relative;
    border: 2px solid #6366f1;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(129, 140, 248, 0.05) 100%);
}

.ecosystem-card-highlight:hover {
    border-color: #818cf8;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.ecosystem-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: linear-gradient(135deg, #6366f1 0%, #818cf8 100%);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Ecosystem workflow diagram */
.ecosystem-workflow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
    flex-wrap: wrap;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border);
}

.workflow-step {
    text-align: center;
    padding: var(--space-md);
}

.workflow-step-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
    display: block;
}

.workflow-step-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.workflow-step-tool {
    font-size: 0.8rem;
    color: var(--accent);
}

.workflow-step-output {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.workflow-arrow {
    color: var(--accent);
    font-size: 1.5rem;
    font-weight: 700;
}

/* Workflow tabs */
.workflow-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.workflow-tab {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.workflow-tab:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.workflow-tab.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.ecosystem-workflow.hidden {
    display: none;
}

.ecosystem-cta {
    text-align: center;
    margin-top: var(--space-xl);
}

@media (max-width: 640px) {
    .ecosystem-workflow {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .workflow-arrow {
        transform: rotate(90deg);
    }

    .ecosystem-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Cross-Link Section (Code <-> Cowork)
   ============================================ */

/* Hero Cowork Box */
.hero-cowork-box {
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.08), rgba(236, 72, 153, 0.08));
    border: 1px solid rgba(139, 92, 246, 0.25);
    border-radius: 12px;
    text-align: center;
}

.hero-cowork-lead {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.hero-cowork-lead strong {
    color: var(--accent);
}

.hero-cowork-prereq {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.prereq-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    background: rgba(139, 92, 246, 0.15);
    color: var(--text-muted);
    border-radius: 4px;
}

.btn-cowork {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    color: white;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-cowork:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
    color: white;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-cowork-box {
        padding: 1rem 1.25rem;
    }

    .hero-cowork-lead {
        font-size: 0.9rem;
    }

    .btn-cowork {
        font-size: 0.85rem;
        padding: 0.55rem 1rem;
    }
}

@media (max-width: 480px) {
    .hero-cowork-prereq {
        flex-direction: column;
        gap: 0.25rem;
    }

    .prereq-tag {
        display: inline-block;
    }
}

.crosslink-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

/* DEPRECATED: Use .section--alt instead */
/* .section-alternate - removed, use section--alt */

.crosslink-section .container {
    text-align: center;
}

.crosslink-signals {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin: var(--space-lg) 0 var(--space-xl);
}

.crosslink-signals span {
    background: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.crosslink-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    max-width: 500px;
    margin: 0 auto;
    padding: var(--space-lg);
    background: var(--surface-elevated);        /* pure white */
    border: 2px solid var(--border);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    box-shadow: var(--shadow-sm);               /* subtle elevation */
    transition: all var(--transition-normal);
}

.crosslink-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);       /* pronounced hover */
    text-decoration: none;
}

.crosslink-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.crosslink-content {
    flex: 1;
    text-align: left;
}

.crosslink-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.crosslink-stats {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.crosslink-cta {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
}

@media (max-width: 640px) {
    .crosslink-signals {
        flex-direction: column;
        align-items: center;
    }

    .crosslink-card {
        flex-direction: column;
        text-align: center;
    }

    .crosslink-content {
        text-align: center;
    }
}

/* Release cards toggle */
.release-card-hidden { display: none; }