/* ========================================
   DevNexus Desktop — Website Prototype
   Dark Theme Design System
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --bg-base: #06060c;
    --bg-surface: #0e0e1a;
    --bg-elevated: #161625;
    --bg-hover: #1c1c30;
    --bg-alt: #0a0a14;

    --primary: #4361ee;
    --primary-hover: #5a78f5;
    --primary-glow: rgba(67, 97, 238, 0.15);
    --accent: #e94560;
    --accent-hover: #f25c75;
    --success: #06d6a0;
    --warning: #ffd166;
    --info: #118ab2;

    --text-primary: #edf2f4;
    --text-secondary: #8d99ae;
    --text-tertiary: #5c6478;
    --text-inverse: #06060c;

    --border: #1e1e32;
    --border-light: #2b2d42;
    --border-focus: #4361ee;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.6);
    --shadow-glow: 0 0 30px rgba(67, 97, 238, 0.2);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    --nav-height: 64px;
    --container-max: 1200px;
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--font-sans);
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-hover); }

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--bg-elevated);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

img { max-width: 100%; height: auto; }

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

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }

ul { list-style: none; }

table { width: 100%; border-collapse: collapse; }

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(6, 6, 12, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: background 0.3s;
}

.nav.scrolled { background: rgba(6, 6, 12, 0.95); }

.nav-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}
.nav-logo:hover { color: var(--text-primary); }
.nav-logo-icon { width: 32px; height: 32px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    color: var(--text-secondary);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}
.nav-links a:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-links a.active { color: var(--primary); }

.nav-github {
    display: flex;
    align-items: center;
    padding: 8px;
    margin-left: 8px;
    border-radius: var(--radius-sm);
}

.nav-launch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 12px;
    padding: 7px 16px;
    background: var(--primary);
    color: #fff !important;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(67, 97, 238, 0.25);
}
.nav-launch:hover {
    background: var(--primary-hover);
    color: #fff !important;
    box-shadow: 0 4px 16px rgba(67, 97, 238, 0.4);
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-secondary);
    transition: all 0.3s;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(67, 97, 238, 0.3);
}
.btn-primary:hover {
    background: var(--primary-hover);
    color: #fff;
    box-shadow: 0 4px 16px rgba(67, 97, 238, 0.4);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}
.btn-outline:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--text-tertiary);
}

.btn-lg { padding: 14px 32px; font-size: 1rem; }

/* --- Hero --- */
.hero {
    padding: calc(var(--nav-height) + 80px) 0 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

/* --- Screenshot Mockup --- */
.hero-screenshot {
    max-width: 960px;
    margin: 0 auto;
    position: relative;
}

.screenshot-window {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.screenshot-titlebar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
}

.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.screenshot-title {
    margin-left: 12px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.screenshot-content {
    display: flex;
    min-height: 380px;
}

.mock-sidebar {
    width: 180px;
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    padding: 16px 0;
    flex-shrink: 0;
}

.mock-nav-item {
    padding: 8px 20px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: default;
}
.mock-nav-item.active {
    color: var(--primary);
    background: var(--primary-glow);
    border-right: 2px solid var(--primary);
}

.mock-main { flex: 1; padding: 20px 24px; }

.mock-header { margin-bottom: 20px; }

.mock-breadcrumb {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.mock-stats-row {
    display: flex;
    gap: 20px;
}

.mock-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 20px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.mock-stat-num { font-size: 1.5rem; font-weight: 700; }
.mock-stat-label { font-size: 0.7rem; color: var(--text-tertiary); }
.green-text { color: var(--success); }
.yellow-text { color: var(--warning); }

.mock-waves { margin-bottom: 16px; }

.mock-wave {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    background: var(--bg-elevated);
}

.mock-wave-head {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    margin-bottom: 6px;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-green { background: rgba(6, 214, 160, 0.15); color: var(--success); }
.badge-blue { background: rgba(67, 97, 238, 0.15); color: var(--primary); }
.badge-pink { background: rgba(233, 69, 96, 0.15); color: var(--accent); }
.badge-gray { background: rgba(141, 153, 174, 0.1); color: var(--text-tertiary); }

.mock-progress {
    height: 4px;
    background: var(--bg-alt);
    border-radius: 2px;
    overflow: hidden;
}
.mock-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    border-radius: 2px;
    transition: width 1s ease;
}

.mock-agents {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mock-agent {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.78rem;
    padding: 6px 10px;
    background: var(--bg-alt);
    border-radius: var(--radius-sm);
}

.pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}
.green-pulse { background: var(--success); box-shadow: 0 0 6px var(--success); animation: pulse 2s infinite; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.mock-agent-task {
    color: var(--text-tertiary);
    margin-left: auto;
}

/* --- Sections --- */
.section {
    padding: 80px 0;
}

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

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 12px;
}

.section-sub {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-size: 1.1rem;
}

/* --- Compare Grid --- */
.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 40px;
}

.compare-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}
.compare-card h3 { margin-bottom: 20px; font-size: 1.3rem; }
.compare-card ul { display: flex; flex-direction: column; gap: 12px; }
.compare-card li {
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.compare-card li::before {
    position: absolute;
    left: 0;
    font-size: 1.1rem;
}

.compare-bad { background: rgba(233, 69, 96, 0.05); border-color: rgba(233, 69, 96, 0.2); }
.compare-bad h3 { color: var(--accent); }
.compare-bad li::before { content: '✕'; color: var(--accent); }

.compare-good { background: rgba(6, 214, 160, 0.05); border-color: rgba(6, 214, 160, 0.2); }
.compare-good h3 { color: var(--success); }
.compare-good li::before { content: '✓'; color: var(--success); }

/* --- Feature Grid --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px 28px;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}
.feature-card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-glow);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    color: var(--primary);
}

.feature-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* --- Feature Detail (Features page) --- */
.feature-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 40px 0;
}
.feature-detail.reverse { direction: rtl; }
.feature-detail.reverse > * { direction: ltr; }

.feature-detail-text h2 { font-size: 1.6rem; margin-bottom: 16px; }
.feature-detail-text p { color: var(--text-secondary); margin-bottom: 20px; }

.feature-list { display: flex; flex-direction: column; gap: 10px; }
.feature-list li {
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.divider { border-top: 1px solid var(--border); margin: 20px 0; }

/* --- Terminal Mockup --- */
.terminal-mock {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.terminal-mock.small { font-size: 0.85rem; }

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}
.terminal-header span:last-child { margin-left: 8px; }

.terminal-body {
    padding: 16px 20px;
    overflow-x: auto;
}
.terminal-body pre {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.8;
    white-space: pre;
    color: var(--text-secondary);
}

.t-green { color: var(--success); }
.t-cyan { color: var(--info); }
.t-dim { color: var(--text-tertiary); }
.t-bold { color: var(--text-primary); font-weight: 700; }

/* --- Stats Grid --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}
.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}
.stat-label {
    font-size: 0.82rem;
    color: var(--text-tertiary);
}

/* --- Architecture Diagram --- */
.arch-diagram {
    max-width: 600px;
    margin: 40px auto 0;
    text-align: center;
}

.arch-layer {
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    margin-bottom: 0;
}
.arch-tauri { background: rgba(233, 69, 96, 0.08); border-color: rgba(233, 69, 96, 0.25); }
.arch-react { background: rgba(67, 97, 238, 0.08); border-color: rgba(67, 97, 238, 0.25); }
.arch-flask { background: rgba(83, 52, 131, 0.12); border-color: rgba(83, 52, 131, 0.3); }

.arch-label {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 10px;
}
.arch-lang {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

.arch-items { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.arch-items span {
    padding: 4px 12px;
    background: rgba(255,255,255,0.05);
    border-radius: 999px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.arch-arrow {
    padding: 8px 0;
    color: var(--text-tertiary);
    font-size: 1.2rem;
}

.arch-agents-row {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.arch-agent {
    padding: 12px 24px;
    background: rgba(6, 214, 160, 0.08);
    border: 1px solid rgba(6, 214, 160, 0.25);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--success);
}

/* --- Platforms --- */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.platform-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}
.platform-card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
}
.platform-card svg { color: var(--text-secondary); margin-bottom: 20px; }
.platform-card h3 { font-size: 1.3rem; margin-bottom: 6px; }
.platform-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 14px; }
.platform-format { display: block; color: var(--text-tertiary); font-size: 0.8rem; font-family: var(--font-mono); }
.platform-size { display: block; color: var(--text-tertiary); font-size: 0.8rem; margin-top: 4px; }

/* --- CTA Section --- */
.cta-section {
    text-align: center;
    background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-surface) 100%);
    border-top: 1px solid var(--border);
    padding: 100px 0;
}
.cta-section h2 { font-size: 2.2rem; margin-bottom: 16px; }
.cta-section p { color: var(--text-secondary); margin-bottom: 32px; font-size: 1.1rem; }

/* --- Page Header --- */
.page-header {
    padding: calc(var(--nav-height) + 60px) 0 40px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}
.page-header h1 { font-size: 2.5rem; margin-bottom: 12px; }
.page-header p { color: var(--text-secondary); font-size: 1.1rem; }

/* --- Download Page --- */
.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.download-card {
    text-align: center;
    padding: 40px 28px 32px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}
.download-card:hover { border-color: var(--primary); box-shadow: var(--shadow-glow); }
.download-card.detected { border-color: var(--primary); box-shadow: var(--shadow-glow); position: relative; }
.download-card.detected::after {
    content: 'Detected';
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 0.7rem;
    background: var(--primary);
    color: #fff;
    padding: 2px 10px;
    border-radius: 999px;
    font-weight: 600;
}
.download-card svg { color: var(--text-secondary); margin-bottom: 20px; }
.download-card h3 { font-size: 1.3rem; margin-bottom: 6px; }
.download-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 20px; }

.download-meta {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 16px;
    font-size: 0.78rem;
    color: var(--text-tertiary);
}

.download-info {
    margin-bottom: 40px;
}
.download-info h3 { font-size: 1.2rem; margin-bottom: 16px; }
.download-info p { color: var(--text-secondary); }

.version-badge {
    display: inline-block;
    margin-top: 16px;
    padding: 6px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* --- Info Table --- */
.info-table {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.info-table tr { border-bottom: 1px solid var(--border); }
.info-table tr:last-child { border-bottom: none; }
.info-table td {
    padding: 12px 16px;
    font-size: 0.9rem;
}
.info-table td:first-child {
    font-weight: 600;
    color: var(--text-secondary);
    width: 200px;
    background: var(--bg-surface);
}

/* --- Docs Layout --- */
.docs-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 48px;
    align-items: start;
}

.docs-sidebar {
    position: sticky;
    top: calc(var(--nav-height) + 24px);
}
.docs-sidebar h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-tertiary);
    margin: 20px 0 8px;
}
.docs-sidebar h4:first-child { margin-top: 0; }

.docs-link {
    display: block;
    padding: 6px 12px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}
.docs-link:hover { background: var(--bg-hover); color: var(--text-primary); }
.docs-link.active { color: var(--primary); background: var(--primary-glow); }

.docs-content h2 { margin-top: 32px; }
.docs-content h2:first-child { margin-top: 0; }
.docs-content h3 { margin-top: 24px; color: var(--text-secondary); }
.docs-content p { color: var(--text-secondary); margin-bottom: 16px; }

.docs-note {
    padding: 16px 20px;
    background: rgba(67, 97, 238, 0.08);
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 32px;
}

/* --- Changelog --- */
.changelog-content { max-width: 800px; }

.changelog-entry {
    padding: 32px 0;
    border-bottom: 1px solid var(--border);
}
.changelog-entry:last-child { border-bottom: none; }

.changelog-version {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.changelog-version h2 { margin-bottom: 0; font-family: var(--font-mono); }
.changelog-date { color: var(--text-tertiary); font-size: 0.88rem; }

.changelog-body h3 { color: var(--success); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; margin-top: 20px; }
.changelog-body ul { margin-bottom: 16px; }
.changelog-body li {
    padding: 4px 0 4px 20px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.changelog-body li::before {
    content: '•';
    position: absolute;
    left: 4px;
    color: var(--text-tertiary);
}

.changelog-downloads { margin-top: 20px; }
.changelog-downloads h4 { font-size: 0.85rem; color: var(--text-tertiary); margin-bottom: 8px; }
.changelog-dl {
    display: inline-block;
    padding: 6px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    margin-right: 8px;
    margin-bottom: 8px;
}
.changelog-dl:hover { border-color: var(--primary); }

/* --- About --- */
.about-content { max-width: 800px; }
.about-content h2 { margin-top: 40px; }
.about-content h2:first-child { margin-top: 0; }
.about-content p { color: var(--text-secondary); margin-bottom: 16px; }

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 16px;
}
.team-card {
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}
.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
}
.team-card h3 { font-size: 1rem; margin-bottom: 4px; }
.team-card p { color: var(--text-tertiary); font-size: 0.85rem; margin-bottom: 0; }

/* --- Legal --- */
.legal-content { max-width: 800px; }
.legal-content h2 { margin-top: 40px; }
.legal-content h2:first-child { margin-top: 0; }
.legal-content h3 { margin-top: 24px; color: var(--text-secondary); }
.legal-content p { color: var(--text-secondary); margin-bottom: 12px; }
.legal-content ul {
    margin-bottom: 16px;
    padding-left: 24px;
}
.legal-content li {
    list-style: disc;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 6px;
}

/* --- Footer --- */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    padding: 60px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.footer-tagline { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
.footer-copy { color: var(--text-tertiary); font-size: 0.78rem; }

.footer-col h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.88rem;
    padding: 4px 0;
}
.footer-col a:hover { color: var(--text-primary); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .compare-grid { grid-template-columns: 1fr; }
    .feature-detail { grid-template-columns: 1fr; gap: 24px; }
    .feature-detail.reverse { direction: ltr; }
    .download-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto 48px; }
    .platforms-grid { grid-template-columns: 1fr; max-width: 400px; margin: 40px auto 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .docs-layout { grid-template-columns: 1fr; }
    .docs-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 4px; }
    .docs-sidebar h4 { width: 100%; margin: 12px 0 4px; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border);
        padding: 16px;
        gap: 4px;
    }
    .nav-toggle { display: flex; }
    .nav-launch { margin-left: 0; margin-top: 8px; justify-content: center; }

    .hero-title { font-size: 2rem; }
    .hero-sub { font-size: 1rem; }
    .hero-actions { flex-direction: column; align-items: center; }

    .screenshot-content { flex-direction: column; }
    .mock-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); display: flex; overflow-x: auto; padding: 8px; }
    .mock-nav-item { white-space: nowrap; }

    .features-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .arch-agents-row { flex-direction: column; align-items: center; }

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