:root {
  --bg: #0A0F1A;
  --bg-card: #0f1a2e;
  --bg-code: #0a1220;
  --bg-hover: #132240;
  --bg-sidebar: #0c1425;
  --border: #1a2d4d;
  --border-hover: #264170;
  --text: #E6EDF3;
  --text-muted: #9cb3cc;
  --text-dim: #5d7a99;
  --accent: #1565C0;
  --accent-hover: #00B8D9;
  --accent-dim: rgba(21, 101, 192, 0.18);
  --green: #10b981;
  --green-dim: rgba(16, 185, 129, 0.15);
  --orange: #f59e0b;
  --orange-dim: rgba(245, 158, 11, 0.15);
  --red: #ef4444;
  --red-dim: rgba(239, 68, 68, 0.15);
  --purple: #0F3D6B;
  --purple-dim: rgba(15, 61, 107, 0.25);
  --cyan: #22D3EE;
  --cyan-dim: rgba(34, 211, 238, 0.15);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -2px rgba(0,0,0,0.2);
  --sidebar-width: 280px;
  --header-height: 64px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); overflow-x: hidden; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

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

/* ─── Header ─── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 14, 23, 0.85);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 24px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
}

.logo span { color: var(--accent); }

.header-nav { display: flex; gap: 4px; align-items: center; }

.header-nav a {
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.header-nav a:hover { color: var(--text); background: var(--bg-hover); }
.header-nav a.active { color: #00B8D9; background: rgba(0, 184, 217, 0.12); }

.header-right { display: flex; align-items: center; gap: 12px; }

.version-badge {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--green-dim);
  color: var(--green);
  font-weight: 600;
  font-family: var(--font-mono);
}

.github-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 14px;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.github-link:hover { color: var(--text); border-color: var(--border-hover); background: var(--bg-hover); }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 18px;
}

/* ─── Layout ─── */
.doc-layout {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* ─── Sidebar ─── */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 20px 0;
  z-index: 50;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.sidebar-section { margin-bottom: 8px; }

.sidebar-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 8px 24px 4px;
}

.sidebar-link {
  display: block;
  padding: 6px 24px 6px 28px;
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 450;
  transition: all 0.15s;
  border-left: 2px solid transparent;
}

.sidebar-link:hover { color: var(--text); background: var(--bg-hover); }
.sidebar-link.active { color: #00B8D9; border-left-color: #00B8D9; background: rgba(0, 184, 217, 0.1); }

.sidebar-link.sub {
  padding-left: 40px;
  font-size: 13px;
  color: var(--text-dim);
}

.sidebar-link.sub:hover { color: var(--text-muted); }

/* ─── Content ─── */
.content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
  padding: 40px 56px 80px;
}

.content h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.content h2 {
  font-size: 22px;
  font-weight: 700;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.01em;
}

.content h3 {
  font-size: 17px;
  font-weight: 650;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text);
}

.content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.content p { margin-bottom: 16px; color: var(--text-muted); }
.content p strong { color: var(--text); font-weight: 600; }

.page-desc {
  font-size: 17px;
  color: var(--text-dim);
  margin-bottom: 32px;
  line-height: 1.6;
}

.content ul, .content ol { margin-bottom: 16px; padding-left: 24px; color: var(--text-muted); }
.content li { margin-bottom: 6px; }
.content li code { font-size: 13px; }

/* ─── Code Blocks ─── */
code {
  font-family: var(--font-mono);
  font-size: 13px;
}

:not(pre) > code {
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 2px 7px;
  border-radius: 4px;
  color: var(--cyan);
  font-size: 13px;
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  margin-bottom: 20px;
  line-height: 1.6;
  position: relative;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 13.5px;
}

pre .comment { color: var(--text-dim); font-style: italic; }
pre .keyword { color: #00B8D9; }
pre .string { color: var(--green); }
pre .decorator { color: var(--orange); }
pre .function { color: #22D3EE; }
pre .number { color: var(--orange); }
pre .builtin { color: #22D3EE; }

.code-label {
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─── Tables ─── */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 14px;
}

thead th {
  text-align: left;
  font-weight: 600;
  color: var(--text);
  padding: 10px 16px;
  border-bottom: 2px solid var(--border);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tbody td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  vertical-align: top;
}

tbody tr:hover { background: var(--bg-hover); }

td code {
  font-size: 12.5px;
  white-space: nowrap;
}

/* ─── Cards ─── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.2s;
}

.card:hover { border-color: var(--border-hover); transform: translateY(-1px); box-shadow: var(--shadow-lg); }

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}

.card h3 { font-size: 16px; margin-top: 0; margin-bottom: 8px; color: var(--text); }
.card p { font-size: 13.5px; color: var(--text-dim); margin-bottom: 0; line-height: 1.5; }

/* ─── Info Boxes ─── */
.info-box {
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 20px;
  font-size: 14px;
  line-height: 1.6;
  border-left: 3px solid;
}

.info-box p { margin-bottom: 0; }

.info-box.tip { background: var(--green-dim); border-color: var(--green); color: var(--green); }
.info-box.warning { background: var(--orange-dim); border-color: var(--orange); color: var(--orange); }
.info-box.danger { background: var(--red-dim); border-color: var(--red); color: var(--red); }
.info-box.note { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

.info-box > strong:first-child { display: block; margin-bottom: 4px; }
.info-box p strong { display: inline; }

/* ─── Method Badges ─── */
.method {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.method.get { background: var(--green-dim); color: var(--green); }
.method.post { background: var(--accent-dim); color: var(--accent); }
.method.put { background: var(--orange-dim); color: var(--orange); }
.method.delete { background: var(--red-dim); color: var(--red); }
.method.patch { background: var(--purple-dim); color: var(--purple); }

/* ─── API Reference ─── */
.api-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
}

.api-header {
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}

.api-header:hover { background: var(--bg-hover); }

.api-badge {
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.api-badge.class { background: rgba(0, 184, 217, 0.15); color: #00B8D9; }
.api-badge.method { background: var(--accent-dim); color: #22D3EE; }
.api-badge.func { background: var(--green-dim); color: var(--green); }
.api-badge.prop { background: var(--orange-dim); color: var(--orange); }
.api-badge.decorator { background: var(--cyan-dim); color: var(--cyan); }

.api-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.api-sig {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-left: auto;
}

.api-body {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-muted);
}

.api-body p { margin-bottom: 8px; }

/* ─── Hero (Index) ─── */
.hero {
  text-align: center;
  padding: 80px 40px 60px;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #E6EDF3 0%, #00B8D9 40%, #1565C0 70%, #0F3D6B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
}

.hero .tagline {
  font-size: 20px;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.5;
}

.hero-buttons { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #1565C0, #00B8D9);
  color: #fff;
}

.btn-primary:hover { background: linear-gradient(135deg, #00B8D9, #22D3EE); color: #fff; transform: translateY(-1px); }

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

.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-hover); color: var(--text); }

/* ─── Feature Grid ─── */
.features {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 40px 60px;
}

.features h2 {
  text-align: center;
  font-size: 28px;
  margin-bottom: 40px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.2s;
}

.feature:hover { border-color: var(--border-hover); box-shadow: var(--shadow); }

.feature-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.feature h3 { font-size: 16px; margin-bottom: 8px; margin-top: 0; }
.feature p { font-size: 13.5px; color: var(--text-dim); margin-bottom: 0; }

/* ─── Quick Install ─── */
.install-box {
  max-width: 600px;
  margin: 0 auto 60px;
  text-align: center;
}

.install-box h2 { text-align: center; border: none; padding-bottom: 0; }

.install-cmd {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
}

.install-cmd .prompt { color: var(--text-dim); -webkit-user-select: none; user-select: none; }
.install-note { text-align: center; color: var(--text-muted); font-size: 13.5px; margin-top: 12px; }
.install-note code { color: var(--cyan); font-size: 12.5px; }

/* ─── Params Table ─── */
.params-table { font-size: 13.5px; }
.params-table td:first-child { font-family: var(--font-mono); color: var(--cyan); white-space: nowrap; font-weight: 500; }
.params-table td:nth-child(2) { font-family: var(--font-mono); color: var(--text-dim); font-size: 12.5px; }

/* ─── Footer ─── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 40px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .content { padding: 32px 32px 60px; }
}

@media (max-width: 768px) {
  .header-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.97);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 0;
    z-index: 99;
  }
  .header-nav.open {
    display: flex;
  }
  .header-nav a {
    padding: 10px 24px;
    border-radius: 0;
    font-size: 15px;
  }
  .header-nav a:hover { background: var(--bg-hover); }
  .menu-toggle { display: block; }
  .sidebar { transform: translateX(-100%); transition: transform 0.3s; }
  .sidebar.open { transform: translateX(0); }
  .content { margin-left: 0; padding: 24px 16px 60px; max-width: 100vw; overflow-x: hidden; }
  .hero { padding: 80px 16px 40px; }
  .hero h1 { font-size: 28px; }
  .hero .tagline { font-size: 15px; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 280px; justify-content: center; text-align: center; }
  .feature-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .features { padding: 0 16px 40px; }
  .features h2 { font-size: 22px; margin-bottom: 24px; }
  .section-centered { padding: 0 16px; margin-bottom: 40px; }
  .section-centered h2 { font-size: 20px; }
  .install-box { margin-bottom: 40px; }
  .install-cmd { font-size: 13px; padding: 12px 16px; }
  pre { padding: 14px 12px; font-size: 12px; max-width: calc(100vw - 32px); }
  pre code { font-size: 12px; white-space: pre; word-break: break-all; }
  .content h1 { font-size: 24px; }
  .content h2 { font-size: 18px; margin-top: 32px; }
  .content h3 { font-size: 15px; }
  .comparison-container { overflow-x: auto; }
  .comparison-container table { min-width: 600px; }
  table { font-size: 12px; display: block; overflow-x: auto; max-width: calc(100vw - 32px); }
  thead, tbody, tr, th, td { white-space: normal; }
  thead th { padding: 8px 10px; font-size: 11px; }
  tbody td { padding: 8px 10px; }
  td code { white-space: normal; word-break: break-word; }
  .api-header { flex-wrap: wrap; gap: 6px; padding: 10px 14px; }
  .api-sig { margin-left: 0; font-size: 11px; width: 100%; }
  .api-body { padding: 12px 14px; }
  .perf-container { padding: 0 8px; }
  .perf-label { width: 40px; font-size: 11px; }
  .perf-value { width: 50px; font-size: 11px; }
  .site-footer { padding: 24px 16px; }
  .site-header { padding: 0 16px; }
  .github-link { font-size: 0; padding: 6px 8px; }
  .github-link svg { font-size: initial; }
}

/* ─── Scroll anchor offset ─── */
[id] { scroll-margin-top: calc(var(--header-height) + 20px); }

/* ─── TOC (right side) ─── */
.toc {
  position: fixed;
  right: 24px;
  top: calc(var(--header-height) + 24px);
  width: 200px;
  font-size: 12.5px;
  display: none;
}

@media (min-width: 1280px) { .toc { display: block; } }

.toc-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.toc a {
  display: block;
  padding: 3px 0;
  color: var(--text-dim);
  transition: color 0.15s;
  line-height: 1.4;
}

.toc a:hover { color: var(--text-muted); }
.toc a.active { color: var(--accent); }

/* ─── Copy Button ─── */
.copy-btn {
  position: absolute;
  top: 8px;
  right: 12px;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-sans);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  opacity: 0;
  z-index: 1;
}

pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--text); background: var(--border); }

/* ─── Index page no-sidebar ─── */
.index-page .content { margin-left: 0; max-width: 100%; padding: 0; }

/* ─── Performance Section ─── */
.perf-subtitle {
  text-align: center;
  color: var(--text-dim);
  max-width: 600px;
  margin: -24px auto 32px;
}

.perf-container { max-width: 700px; margin: 0 auto; }

.perf-bars { margin-top: 16px; }
.perf-group { margin-bottom: 12px; }
.perf-group-label { font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }

.perf-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.perf-label {
  font-size: 12px;
  color: var(--text-muted);
  width: 48px;
}

.perf-track {
  flex: 1;
  background: var(--bg-code);
  border-radius: 4px;
  height: 20px;
  overflow: hidden;
}

.perf-bar {
  height: 100%;
  border-radius: 4px;
}

.perf-bar.w-full { width: 100%; }
.perf-bar.w-70 { width: 70%; }
.perf-bar.w-67 { width: 67%; }
.perf-bar.w-63 { width: 63%; }
.perf-bar.w-61 { width: 61%; }
.perf-bar.w-45 { width: 45%; }
.perf-bar.w-43 { width: 43%; }
.perf-bar.w-21 { width: 21%; }
.perf-bar.w-19 { width: 19%; }
.perf-bar.w-18 { width: 18%; }
.perf-bar.w-16 { width: 16%; }
.perf-bar.w-14 { width: 14%; }

.perf-bar.primary { background: linear-gradient(90deg, #1565C0, #00B8D9); }
.perf-bar.muted { background: var(--text-dim); opacity: 0.5; }

.perf-value {
  font-size: 12px;
  font-family: var(--font-mono);
  width: 60px;
  text-align: right;
}

.perf-value.primary { color: var(--cyan); }
.perf-value.muted { color: var(--text-dim); }

.perf-note {
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 16px;
}

/* ─── Comparison Section ─── */
.comparison-subtitle {
  text-align: center;
  color: var(--text-dim);
  max-width: 600px;
  margin: -24px auto 32px;
}

.comparison-container { max-width: 800px; margin: 0 auto; }

/* ─── Code / Section Containers ─── */
.section-centered {
  max-width: 700px;
  margin: 0 auto 60px;
  padding: 0 40px;
}

.section-centered h2 {
  text-align: center;
  border: none;
  padding-bottom: 0;
  margin-top: 0;
}