:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #141414;
    --text-primary: #ededed;
    --text-secondary: #a1a1aa;
    --accent: #ffffff;
    --accent-hover: #e5e5e5;
    --border: #27272a;
    --border-hover: #3f3f46;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    
    --radius: 4px;
    --header-height: 64px;
}

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

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

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    border: 1px solid var(--border);
}

pre {
    background: #000;
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

pre code {
    background: transparent;
    padding: 0;
    border: none;
    color: #e4e4e7;
    font-size: 0.85rem;
    line-height: 1.7;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-weight: 800;
    border-radius: 2px;
    font-size: 0.8rem;
}

.header-nav {
    display: flex;
    gap: 2rem;
}

.header-nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.header-nav a:hover, .header-nav a.active {
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all 0.2s;
    cursor: pointer;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    background: transparent;
    color: var(--text-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--text-primary);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Hero */
.hero {
    padding: 8rem 0 4rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

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

.hero h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    letter-spacing: -0.04em;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 4rem;
}

/* Layout Utilities */
.section {
    padding: 6rem 0;
    border-bottom: 1px solid var(--border);
}

.section-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.section-subtitle {
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 3rem;
}

/* Metrics */
.metrics {
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    padding: 3rem 0;
}

.metric {
    border-left: 1px solid var(--border);
    padding-left: 1.5rem;
}

.metric-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.feature-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Code Tabs */
.code-example {
    background: #000;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.code-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

.code-tab {
    background: none;
    border: none;
    border-right: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: background 0.2s;
}

.code-tab.active {
    background: #000;
    color: var(--text-primary);
    border-bottom: 1px solid transparent;
    margin-bottom: -1px;
}

.code-panel {
    display: none;
}

.code-panel.active {
    display: block;
}

.code-panel pre {
    margin: 0;
    border: none;
    border-radius: 0;
}

/* Architecture Grid */
.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.arch-card {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.arch-letter {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.arch-card h4 {
    margin-bottom: 0.5rem;
}

/* Docs Grid */
.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.doc-link {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.doc-link:hover {
    border-color: var(--border-hover);
    background: var(--bg-secondary);
}

.doc-icon {
    font-family: var(--font-mono);
    font-weight: bold;
    color: var(--text-secondary);
}

.doc-link-text h4 {
    margin-bottom: 0.25rem;
}

.doc-link-text p {
    font-size: 0.85rem;
    margin: 0;
}

/* Docs Layout */
.docs-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 4rem;
    padding: calc(var(--header-height) + 3rem) 0 4rem;
}

.docs-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    height: max-content;
    border-right: 1px solid var(--border);
    padding-right: 2rem;
}

.sidebar-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.sidebar-nav {
    list-style: none;
    margin-bottom: 2rem;
}

.sidebar-nav li {
    margin-bottom: 0.5rem;
}

.sidebar-nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: block;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    color: var(--text-primary);
}

.docs-content {
    min-width: 0;
}

.docs-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.docs-content h2 {
    font-size: 1.75rem;
    margin: 3rem 0 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.docs-content h3 {
    font-size: 1.25rem;
    margin: 2rem 0 1rem;
}

.docs-content ul, .docs-content ol {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.docs-content li {
    margin-bottom: 0.5rem;
}

.docs-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.9rem;
}

.docs-content th, .docs-content td {
    text-align: left;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.docs-content th {
    font-weight: 500;
    color: var(--text-primary);
}

.docs-content td {
    color: var(--text-secondary);
}

/* Callouts */
.callout {
    padding: 1rem 1.5rem;
    border-left: 2px solid var(--border);
    background: var(--bg-secondary);
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    background: var(--bg-primary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-brand h3 {
    margin-bottom: 1rem;
}

.footer-col h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

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

.footer-col li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-social {
    display: flex;
    gap: 1.5rem;
}

/* Syntax Highlighting */
.token-keyword { color: #ff7b72; }
.token-function { color: #d2a8ff; }
.token-type { color: #79c0ff; }
.token-string { color: #a5d6ff; }
.token-variable { color: #c9d1d9; }
.token-number { color: #79c0ff; }
.token-comment { color: #8b949e; }
.token-attr { color: #ffa657; }

/* Comparison Table */
.comparison-container {
    width: 100%;
    overflow-x: auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 800px;
}

.comparison-table th, .comparison-table td {
    padding: 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.comparison-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.comparison-table td {
    color: var(--text-secondary);
    vertical-align: top;
}

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

.comparison-table strong {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .header-nav { display: none; }
    .header-nav.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        padding: 2rem;
        border-bottom: 1px solid var(--border);
    }
    .mobile-toggle { display: block; }
    .hero h1 { font-size: 2.5rem; }
    .docs-layout { grid-template-columns: 1fr; }
    .docs-sidebar { display: none; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}