:root {
      --bg: #000000;
      --bg-elevated: #111111;
      --bg-card: #1a1a1a;
      --bg-code: #121212;
      --text: #ffffff;
      --text-secondary: #b5b5b5;
      --text-muted: #525252;
      --primary: #e0e0e0;
      --primary-dim: #8f8f8f;
      --border: #1f1f1f;
      --border-subtle: rgba(255, 255, 255, 0.1);
      --accent-gradient: linear-gradient(135deg, #ffffff 0%, #8f8f8f 100%);
    }

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

    body {
      font-family: "Inter", system-ui, -apple-system, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    .top-nav {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(0, 0, 0, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-subtle);
      padding: 0.875rem 2rem;
    }

    .nav-inner {
      max-width: 56rem;
      margin: 0 auto;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .brand {
      font-weight: 800;
      font-size: 1.1rem;
      color: var(--primary);
      text-decoration: none;
      letter-spacing: -0.02em;
    }

    .nav-separator { color: var(--text-muted); }
    .nav-section { color: var(--text-secondary); font-size: 0.875rem; }

    .layout {
      max-width: 56rem;
      margin: 0 auto;
      padding: 2rem;
    }

    .breadcrumb { margin-bottom: 2rem; }

    .nav-back {
      color: var(--primary);
      text-decoration: none;
      font-size: 0.875rem;
      font-weight: 500;
      transition: opacity 0.15s;
    }
    .nav-back:hover { opacity: 0.8; }

    /* Prose styles */
    .prose h1 {
      font-size: 2.5rem;
      font-weight: 900;
      letter-spacing: -0.03em;
      line-height: 1.15;
      margin-bottom: 1.5rem;
      background: linear-gradient(to bottom, #fff 0%, #8f8f8f 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .prose h2 {
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-top: 3rem;
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid var(--border-subtle);
    }

    .prose h3 {
      font-size: 1.2rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      margin-top: 2rem;
      margin-bottom: 0.75rem;
      color: var(--primary);
    }

    .prose p {
      margin-bottom: 1rem;
      color: var(--text-secondary);
    }

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

    .prose a {
      color: var(--primary);
      text-decoration: none;
      border-bottom: 1px solid transparent;
      transition: border-color 0.15s;
    }
    .prose a:hover { border-bottom-color: var(--primary); }

    .prose ul, .prose ol {
      margin-bottom: 1rem;
      padding-left: 1.5rem;
      color: var(--text-secondary);
    }
    .prose li { margin-bottom: 0.35rem; }
    .prose li strong { color: var(--text); }

    .prose code {
      font-family: "JetBrains Mono", monospace;
      font-size: 0.85em;
      background: var(--bg-code);
      border: 1px solid var(--border-subtle);
      border-radius: 4px;
      padding: 0.15em 0.4em;
      color: var(--primary);
    }

    .prose pre {
      background: var(--bg-code);
      border: 1px solid var(--border-subtle);
      border-radius: 8px;
      padding: 1.25rem;
      margin-bottom: 1.5rem;
      overflow-x: auto;
    }

    .prose pre code {
      background: none;
      border: none;
      padding: 0;
      font-size: 0.875rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .prose blockquote {
      border-left: 3px solid var(--primary-dim);
      margin: 1.5rem 0;
      padding: 0.75rem 1.25rem;
      background: rgba(255, 255, 255, 0.04);
      border-radius: 0 8px 8px 0;
    }
    .prose blockquote p { color: var(--text-secondary); margin-bottom: 0; }

    .prose table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 1.5rem;
      font-size: 0.9rem;
    }

    .prose th {
      text-align: left;
      padding: 0.75rem 1rem;
      background: var(--bg-elevated);
      border-bottom: 2px solid var(--border);
      font-weight: 700;
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--primary);
    }

    .prose td {
      padding: 0.65rem 1rem;
      border-bottom: 1px solid var(--border-subtle);
      color: var(--text-secondary);
    }

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

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

    /* Index page doc cards */
    .doc-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 1rem;
      margin-top: 1.5rem;
    }

    .doc-card {
      display: block;
      background: var(--bg-elevated);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      padding: 1.5rem;
      text-decoration: none;
      transition: border-color 0.2s, transform 0.15s;
    }
    .doc-card:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    .doc-card h3 {
      color: var(--text);
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    .doc-card p {
      color: var(--text-muted);
      font-size: 0.875rem;
      line-height: 1.5;
    }

    @media (max-width: 640px) {
      .layout { padding: 1rem; }
      .prose h1 { font-size: 1.75rem; }
      .prose h2 { font-size: 1.25rem; }
      .doc-grid { grid-template-columns: 1fr; }
    }