:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --text: #0b1120;
  --text-soft: #475569;
  --text-muted: #94a3b8;
  --border: rgba(11, 17, 32, 0.08);
  --accent: #475569;
  --accent-strong: #1e293b;
  --code-bg: #f1f5f9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  --max-content: 760px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #05080f;
  --bg-soft: #0a1228;
  --text: #f1f5f9;
  --text-soft: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #94a3b8;
  --accent-strong: #cbd5e1;
  --code-bg: #0f172a;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-sans); background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--accent-strong); text-decoration: none; border-bottom: 1px solid var(--border); }
a:hover { border-bottom-color: var(--accent); }
code { font-family: var(--font-mono); background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 3px; font-size: 0.92em; }
pre { background: var(--code-bg); padding: 1em; border-radius: 6px; overflow-x: auto; }
pre code { background: none; padding: 0; }

.docs-nav { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.85); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
[data-theme="dark"] .docs-nav { background: rgba(5,8,15,0.85); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0.75rem 1.5rem; display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; border: none; }
.nav-brand img { width: 24px; height: 24px; }
.nav-links { display: flex; align-items: center; gap: 1.25rem; }
.nav-links a { border: none; color: var(--text-soft); font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.theme-toggle { background: transparent; border: none; cursor: pointer; color: var(--text-soft); font-size: 1.1rem; padding: 0.25rem 0.5rem; border-radius: 4px; }

main { max-width: 1200px; margin: 0 auto; padding: 2.5rem 1.5rem; }

/* 3-column layout (doc page only): sidebar | main | TOC */
.doc-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr) 200px; gap: 2rem; max-width: 1400px; margin: 0 auto; padding: 2rem 1.5rem; align-items: start; }
.doc-layout > main { padding: 0; margin: 0; max-width: none; min-width: 0; }
.doc-layout > main article { max-width: var(--max-content); }

.doc-sidebar { position: sticky; top: 5rem; max-height: calc(100vh - 6rem); overflow-y: auto; font-size: 0.92rem; padding-right: 0.5rem; }
.sidebar-header { display: flex; align-items: baseline; justify-content: space-between; gap: 0.5rem; padding-bottom: 0.5rem; margin-bottom: 0.5rem; border-bottom: 1px solid var(--border); }
.sidebar-cat { font-weight: 700; color: var(--text); border: none; font-size: 0.95rem; }
.sidebar-count { font-size: 0.75rem; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.sidebar-tree { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.25rem; }
.sidebar-tree a { display: block; padding: 0.35rem 0.5rem; border-radius: 4px; border: none; color: var(--text-soft); font-size: 0.88rem; line-height: 1.35; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-tree a:hover { background: var(--bg-soft); color: var(--text); }
.sidebar-tree a.active { background: var(--code-bg); color: var(--text); font-weight: 600; }

.doc-toc { position: sticky; top: 5rem; max-height: calc(100vh - 6rem); overflow-y: auto; font-size: 0.85rem; padding-left: 0.5rem; border-left: 1px solid var(--border); }
.toc-label { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.7rem; color: var(--text-muted); font-weight: 600; margin: 0 0 0.75rem; padding-left: 0.6rem; }
.doc-toc ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.25rem; }
.doc-toc a { display: block; padding: 0.25rem 0.6rem; border: none; color: var(--text-soft); border-left: 2px solid transparent; line-height: 1.35; }
.doc-toc a:hover { color: var(--text); }
.doc-toc a.active { color: var(--text); border-left-color: var(--accent-strong); font-weight: 600; }
.toc-h3 { padding-left: 0.75rem; font-size: 0.82rem; }

/* Home */
.docs-home .hero { text-align: center; padding: 3rem 0 2.5rem; max-width: var(--max-content); margin: 0 auto; }
.docs-home .eyebrow { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.8rem; color: var(--accent); font-weight: 600; }
.docs-home h1 { font-size: 3rem; margin: 0.5rem 0 1rem; }
.docs-home .lead { color: var(--text-soft); font-size: 1.15rem; }
.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; margin-top: 2.5rem; }
.category-card { display: block; padding: 1.5rem; border: 1px solid var(--border); border-radius: 8px; background: var(--bg-soft); transition: transform 0.15s, border-color 0.15s; }
.category-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.category-card h3 { margin: 0 0 0.5rem; }
.category-card p { color: var(--text-soft); margin: 0 0 0.75rem; }
.category-card .count { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

/* Category listing */
.breadcrumbs { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.breadcrumbs a { border: none; color: var(--text-soft); }
.cat-header h1 { margin: 0 0 0.5rem; font-size: 2.25rem; }
.cat-header .lead { color: var(--text-soft); margin: 0; }
.cat-header .meta { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.5rem; }
.doc-list { list-style: none; padding: 0; margin: 2rem 0; display: grid; gap: 1.25rem; }
.doc-list li { padding: 1rem 1.25rem; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-soft); }
.doc-list .summary { color: var(--text-soft); margin: 0.5rem 0 0; }
.doc-list .slug { font-size: 0.85rem; color: var(--text-muted); margin: 0.5rem 0 0; }

/* Doc page */
.docs-doc article { max-width: var(--max-content); margin: 0 auto; }
.docs-doc .doc-header h1 { margin: 0 0 0.5rem; }
.docs-doc .doc-header .summary { color: var(--text-soft); font-size: 1.05rem; }
.docs-doc .doc-body { margin-top: 2rem; }
.docs-doc .doc-body h2 { margin-top: 2.5rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--border); }
.docs-doc .doc-body h3 { margin-top: 2rem; }
.docs-doc .doc-body table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
.docs-doc .doc-body th, .docs-doc .doc-body td { border: 1px solid var(--border); padding: 0.5rem 0.75rem; text-align: left; }
.docs-doc .doc-body th { background: var(--bg-soft); }
.docs-doc .doc-footer { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border); font-size: 0.9rem; color: var(--text-muted); }

.badge { display: inline-block; padding: 0.15em 0.6em; font-size: 0.75rem; font-weight: 600; border-radius: 999px; background: var(--code-bg); color: var(--text-soft); margin-right: 0.4em; text-transform: uppercase; letter-spacing: 0.05em; }
.badge.mandatory { background: rgba(239, 68, 68, 0.15); color: #b91c1c; }
[data-theme="dark"] .badge.mandatory { color: #fca5a5; }

.docs-footer { margin-top: 4rem; padding: 2rem 0; border-top: 1px solid var(--border); background: var(--bg-soft); color: var(--text-muted); font-size: 0.9rem; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.footer-inner a { color: var(--text-soft); border: none; }
.footer-inner .meta { font-size: 0.8rem; opacity: 0.7; }

.docs-404 .not-found { text-align: center; padding: 4rem 0; max-width: var(--max-content); margin: 0 auto; }
.docs-404 .eyebrow { font-size: 5rem; font-weight: 700; color: var(--accent); line-height: 1; margin-bottom: 0.5rem; opacity: 0.4; }
.docs-404 h1 { font-size: 2.5rem; margin: 0 0 1rem; }
.docs-404 .lead { color: var(--text-soft); font-size: 1.1rem; }
.docs-404 .not-found-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; margin-top: 2.5rem; }
.docs-404 .btn { display: inline-block; padding: 0.6rem 1.2rem; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text); font-weight: 500; }
.docs-404 .btn:hover { border-color: var(--accent); background: var(--code-bg); }
.docs-404 .btn.primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.docs-404 .btn.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }

@media (max-width: 1100px) {
  .doc-layout { grid-template-columns: 220px minmax(0, 1fr); gap: 1.5rem; }
  .doc-toc { display: none; }
}
@media (max-width: 800px) {
  .doc-layout { grid-template-columns: 1fr; padding: 1.5rem 1rem; }
  .doc-sidebar { position: static; max-height: none; border-bottom: 1px solid var(--border); padding-bottom: 1rem; margin-bottom: 1rem; }
  .sidebar-tree { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}
@media (max-width: 640px) {
  .nav-links a { display: none; }
  .docs-home h1 { font-size: 2.25rem; }
  main { padding: 1.5rem 1rem; }
  .docs-404 .eyebrow { font-size: 3.5rem; }
}