:root {
  --brand: #f59e0b;
  --brand-dark: #d97706;
  --brand-light: #fef3c7;
  --text: #111827;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --bg: #f9fafb;
  --sidebar-w: 260px;
  --topnav-h: 56px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.6;
}

/* ── Top nav ─────────────────────────────────────────────── */
.docs-topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topnav-h);
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 100;
}

.docs-topnav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.docs-topnav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.docs-topnav-links a {
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.15s;
}

.docs-topnav-links a:hover { color: var(--text); }

.docs-topnav-links a.github {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  background: var(--text);
  color: #fff;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
}

/* ── Layout ──────────────────────────────────────────────── */
.docs-layout {
  display: flex;
  min-height: 100vh;
  padding-top: var(--topnav-h);
}

/* ── Sidebar ─────────────────────────────────────────────── */
.docs-sidebar {
  position: fixed;
  top: var(--topnav-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--topnav-h));
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: var(--bg);
  padding: 1.5rem 0;
}

.docs-sidebar-section {
  padding: 0 1.25rem 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.docs-sidebar-link {
  display: block;
  padding: 0.4rem 1.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.15s, background 0.15s;
}

.docs-sidebar-link:hover {
  color: var(--text);
  background: #f3f4f6;
}

.docs-sidebar-link.active {
  color: var(--brand-dark);
  font-weight: 600;
  border-left-color: var(--brand);
  background: var(--brand-light);
}

.docs-sidebar-divider {
  margin: 1rem 1.25rem;
  border: none;
  border-top: 1px solid var(--border);
}

/* ── Main content ────────────────────────────────────────── */
.docs-main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
}

.docs-content {
  max-width: 800px;
  padding: 2.5rem 3rem 4rem;
}

/* ── Typography ──────────────────────────────────────────── */
.docs-content h1 {
  font-size: 1.875rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.docs-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-top: 1rem;
}

.docs-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  color: #374151;
}

.docs-content p {
  margin-bottom: 1rem;
  color: #374151;
}

.docs-content ul, .docs-content ol {
  margin: 0.5rem 0 1rem 1.5rem;
}

.docs-content li {
  margin-bottom: 0.375rem;
  color: #374151;
}

.docs-content a {
  color: var(--brand-dark);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color 0.15s;
}

.docs-content a:hover {
  text-decoration-color: var(--brand-dark);
}

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

.docs-content strong { font-weight: 600; }

.docs-content code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: 0.8125rem;
  background: #f3f4f6;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: #1f2937;
}

.docs-content pre {
  margin: 1rem 0 1.5rem;
  border-radius: 8px;
  overflow: auto;
}

.docs-content pre code {
  font-size: 0.8125rem;
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
}

/* ── Tables ──────────────────────────────────────────────── */
.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.875rem;
}

.docs-content th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  color: #374151;
}

.docs-content td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: #374151;
}

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

/* ── Blockquote / Note ───────────────────────────────────── */
.docs-content blockquote {
  margin: 1rem 0 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--brand-light);
  border-left: 3px solid var(--brand);
  border-radius: 0 6px 6px 0;
  font-size: 0.875rem;
  color: #92400e;
}

.docs-content blockquote p { margin: 0; color: inherit; }

/* ── Checklist ───────────────────────────────────────────── */
.checklist { list-style: none; margin-left: 0; }
.checklist li { display: flex; align-items: flex-start; gap: 0.5rem; margin-bottom: 0.375rem; }
.checklist li::before { content: "☐"; flex-shrink: 0; font-size: 1rem; margin-top: -1px; }

/* ── Docs index cards ────────────────────────────────────── */
.docs-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.docs-index-card {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.docs-index-card:hover {
  border-color: var(--brand);
  box-shadow: 0 2px 8px rgba(245,158,11,0.1);
  text-decoration: none;
}

.docs-index-card-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.docs-index-card h3 { font-size: 0.9375rem; font-weight: 600; color: var(--text); margin-bottom: 0.375rem; margin-top: 0; }
.docs-index-card p { font-size: 0.8125rem; color: var(--text-secondary); margin: 0; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .docs-sidebar { display: none; }
  .docs-main { margin-left: 0; }
  .docs-content { padding: 1.5rem 1.25rem 3rem; }
  .docs-topnav-links a:not(.github) { display: none; }
}