/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root {
  color-scheme: dark;
  --sidebar-w: 280px;
  --header-h: 56px;
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', 'Liberation Sans', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Source Code Pro', 'DejaVu Sans Mono', 'Liberation Mono', Consolas, monospace;

  /* Colors — dark */
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-muted: #1c2128;
  --text: #e6edf3;
  --text-soft: #a8b2c1;
  --text-muted: #6b7b8d;
  --border: #30363d;

  --sidebar-bg: #0f172a;
  --sidebar-text: #cbd5e1;
  --sidebar-heading: #f8fafc;
  --sidebar-hover: rgba(99,102,241,.12);
  --sidebar-active: rgba(99,102,241,.22);
  --sidebar-accent: #818cf8;
  --sidebar-border: #1e293b;

  --primary: #6366f1;
  --primary-soft: rgba(99,102,241,.15);
  --primary-hover: #818cf8;
  --green: #3fb950;
  --green-soft: rgba(63,185,80,.15);
  --amber: #d29922;
  --amber-soft: rgba(210,153,34,.15);
  --red: #f85149;
  --red-soft: rgba(248,81,73,.15);

  --code-bg: #161b22;
  --code-text: #e6edf3;
  --inline-code-bg: rgba(99,102,241,.12);
  --inline-code-text: #a5b4fc;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --radius: 8px;
  --radius-sm: 6px;
}

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 24px); }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ===== Header ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--sidebar-border);
  display: flex; align-items: center;
  padding: 0 24px;
  z-index: 1000;
  gap: 16px;
}
.header-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
  font-weight: 700; font-size: 1.15rem;
  color: #fff;
  white-space: nowrap;
}
.header-brand .logo {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--primary), #a78bfa);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: #fff; font-weight: 800;
}
.header-nav {
  display: flex; align-items: center; gap: 4px;
  margin-left: auto;
}
.header-nav a {
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: .15s;
}
.header-nav a:hover, .header-nav a.active {
  color: #fff;
  background: var(--sidebar-hover);
}
.header-nav a.active { background: var(--sidebar-active); }

/* Header search */
.header-search {
  position: relative;
  flex: 1;
  max-width: 400px;
  margin: 0 auto;
}
.header-search-icon {
  position: absolute;
  left: 10px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--sidebar-text);
  pointer-events: none;
}
#header-search {
  width: 100%;
  padding: 7px 12px 7px 34px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--sidebar-border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: .875rem;
  font-family: inherit;
  outline: none;
  transition: .15s;
}
#header-search:focus {
  background: rgba(255,255,255,0.12);
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99,102,241,.25);
}
#header-search::placeholder {
  color: var(--sidebar-text);
  opacity: .6;
}
.search-results {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  max-height: 400px;
  overflow-y: auto;
  background: var(--sidebar-bg);
  border: 1px solid var(--sidebar-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  z-index: 1001;
}
.search-hit {
  display: block;
  padding: 10px 14px;
  text-decoration: none;
  color: #fff;
  border-bottom: 1px solid var(--sidebar-border);
  transition: .1s;
}
.search-hit:last-child { border-bottom: none; }
.search-hit:hover { background: var(--sidebar-hover); }
.search-hit strong {
  display: block;
  font-size: .875rem;
  margin-bottom: 2px;
}
.search-hit span {
  display: block;
  font-size: .8rem;
  color: var(--sidebar-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-no-results {
  padding: 12px 14px;
  color: var(--sidebar-text);
  font-size: .875rem;
  text-align: center;
}

.menu-toggle {
  display: none;
  background: none; border: none;
  color: #fff; cursor: pointer;
  padding: 4px;
}
.menu-toggle svg { width: 24px; height: 24px; }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--header-h));
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  overflow-y: auto;
  padding: 16px 0;
  z-index: 900;
  transition: transform .25s ease;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 4px; }

.sidebar-section { margin-bottom: 6px; }
.sidebar-heading {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 20px 4px;
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}
.sidebar-heading::before {
  content: '';
  display: inline-block;
  width: 5px; height: 5px;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform .2s;
  flex-shrink: 0;
}
.sidebar-heading.collapsed::before { transform: rotate(-45deg); }

.sidebar-links {
  overflow: hidden;
  max-height: 600px;
  transition: max-height .25s ease, opacity .2s ease;
  opacity: 1;
}
.sidebar-heading.collapsed + .sidebar-links {
  max-height: 0;
  opacity: 0;
}

.sidebar-links { list-style: none; padding: 0; margin: 0 0 4px; }
.sidebar-links a {
  display: block;
  padding: 5px 20px 5px 28px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: .835rem;
  border-left: 2px solid transparent;
  transition: .15s;
}
.sidebar-links a:hover {
  color: #fff;
  background: var(--sidebar-hover);
  border-left-color: rgba(99,102,241,.4);
}
.sidebar-links a.active {
  color: var(--sidebar-accent);
  background: var(--sidebar-active);
  border-left-color: var(--sidebar-accent);
  font-weight: 600;
}

/* Collapsible H3 sub-links in TOC */
.toc-sub {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height .25s ease, opacity .2s ease;
}
.toc-sub.expanded {
  opacity: 1;
}
.toc-sub a {
  display: block;
  padding: 4px 20px 4px 40px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: .8rem;
  border-left: 2px solid transparent;
  transition: .15s;
}
.toc-sub a:hover {
  color: #fff;
  background: var(--sidebar-hover);
  border-left-color: rgba(99,102,241,.4);
}
.toc-sub a.active {
  color: var(--sidebar-accent);
  background: var(--sidebar-active);
  border-left-color: var(--sidebar-accent);
  font-weight: 600;
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 899;
}

/* ===== Main content ===== */
.main {
  margin-left: var(--sidebar-w);
  margin-top: var(--header-h);
  min-height: calc(100vh - var(--header-h));
}
.content {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 48px 80px;
}

/* ===== Typography ===== */
h1 { font-size: 2.2rem; font-weight: 800; letter-spacing: -.02em; margin-bottom: 12px; line-height: 1.2; }
h2 {
  font-size: 1.55rem; font-weight: 700;
  margin: 56px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: calc(var(--header-h) + 24px);
}
h3 { font-size: 1.15rem; font-weight: 650; margin: 32px 0 10px; color: var(--text); }
h4 { font-size: 1rem; font-weight: 600; margin: 24px 0 8px; color: var(--text-soft); }
p { margin: 0 0 16px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.subtitle {
  font-size: 1.15rem;
  color: var(--text-soft);
  margin-bottom: 32px;
  line-height: 1.6;
}

/* ===== Anchor links ===== */
h2 .anchor, h3 .anchor {
  opacity: 0; margin-left: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 400;
  transition: .15s;
}
h2:hover .anchor, h3:hover .anchor { opacity: 1; }
h2 .anchor:hover, h3 .anchor:hover { color: var(--primary); }

/* ===== Badge ===== */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  vertical-align: middle;
  margin-left: 6px;
}
.badge-async { background: var(--primary-soft); color: var(--primary); }
.badge-sync  { background: var(--green-soft); color: var(--green); }
.badge-class { background: var(--amber-soft); color: var(--amber); }
.badge-enum  { background: rgba(147,51,234,.15); color: #a855f7; }
.badge-decorator { background: var(--red-soft); color: var(--red); }
.badge-new   { background: rgba(56,139,253,.15); color: #58a6ff; }

/* ===== Code ===== */
code {
  font-family: var(--font-mono);
  font-size: .85em;
  background: var(--inline-code-bg);
  color: var(--inline-code-text);
  padding: 2px 6px;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 0 0 20px;
  overflow-x: auto;
  line-height: 1.6;
  border: 1px solid rgba(255,255,255,.06);
}
pre code {
  background: none;
  color: var(--code-text);
  padding: 0;
  font-size: .84rem;
}

/* Syntax highlighting */
.kw  { color: #c792ea; }   /* keyword */
.fn  { color: #82aaff; }   /* function */
.st  { color: #c3e88d; }   /* string */
.cm  { color: #546e7a; }   /* comment */
.nb  { color: #f78c6c; }   /* number / builtin */
.op  { color: #89ddff; }   /* operator */
.ty  { color: #ffcb6b; }   /* type */
.dc  { color: #c792ea; }   /* decorator */
.pr  { color: #f07178; }   /* param */

/* ===== API entry blocks ===== */
.api-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.api-entry {
  margin: 12px 0;
  padding: 12px 16px;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border);
}
.api-entry.constructor { border-left-color: var(--amber); }
.api-entry.classmethod { border-left-color: var(--primary); }
.api-entry.method      { border-left-color: var(--green); }
.api-entry.attribute   { border-left-color: var(--text-muted); }

.api-entry .sig {
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--text);
  margin-bottom: 4px;
  word-break: break-word;
}
.api-entry .sig .name { font-weight: 700; color: var(--text); }
.api-entry .sig .param { color: var(--text-soft); }
.api-entry .sig .ret { color: var(--text-muted); font-style: italic; }
.api-entry .desc {
  font-size: .875rem;
  color: var(--text-soft);
  margin: 0;
}

/* ===== Attribute table ===== */
.attr-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
  font-size: .875rem;
}
.attr-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg-muted);
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-soft);
}
.attr-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.attr-table tr:last-child td { border-bottom: none; }
.attr-table .attr-name {
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}
.attr-table .attr-type {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--primary);
  white-space: nowrap;
}
.attr-table .attr-desc { color: var(--text-soft); }

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: .2s;
}
.card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
}
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--primary); text-decoration: none; }
.card p { margin: 0; font-size: .875rem; color: var(--text-soft); }

/* ===== Feature rows (landing page) ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin: 32px 0;
}
.feature {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.feature .icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 12px;
}
.feature h3 { margin: 0 0 6px; font-size: 1.05rem; }
.feature p { margin: 0; font-size: .88rem; color: var(--text-soft); }

/* ===== Hero (landing) ===== */
.hero {
  text-align: center;
  padding: 60px 0 40px;
}
.hero h1 { font-size: 2.8rem; margin-bottom: 16px; }
.hero .subtitle { max-width: 600px; margin: 0 auto 28px; }
.hero-actions {
  display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem;
  text-decoration: none;
  transition: .2s;
  border: none; cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

/* ===== Callout boxes ===== */
.callout {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin: 16px 0;
  font-size: .9rem;
  border-left: 4px solid;
}
.callout-info  { background: rgba(56,139,253,.1); border-left-color: #388bfd; }
.callout-warn  { background: rgba(210,153,34,.1); border-left-color: #d29922; }
.callout-tip   { background: rgba(63,185,80,.1); border-left-color: #3fb950; }

.callout strong { display: block; margin-bottom: 4px; }

/* ===== Search ===== */
.search-box {
  position: relative;
  margin: 12px 16px 8px;
}
.search-box input {
  width: 100%;
  padding: 8px 12px 8px 34px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: .84rem;
  font-family: var(--font-sans);
  outline: none;
  transition: .15s;
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box input:focus {
  border-color: var(--sidebar-accent);
  background: rgba(255,255,255,.12);
}
.search-box .search-icon {
  position: absolute;
  left: 10px; top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--text-muted);
}

/* ===== Tables (general) ===== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
  font-size: .88rem;
}
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg-muted); font-weight: 600; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-soft); }

/* ===== Lists ===== */
ul, ol { margin: 0 0 16px; padding-left: 24px; }
li { margin-bottom: 4px; }
li code { font-size: .82em; }

/* ===== Param list style ===== */
.param-list { list-style: none; padding: 0; margin: 8px 0 16px; }
.param-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: .88rem;
}
.param-list li:last-child { border-bottom: none; }
.param-list .pname {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text);
}
.param-list .ptype {
  font-family: var(--font-mono);
  font-size: .82em;
  color: var(--primary);
}
.param-list .pdesc { color: var(--text-soft); }

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  border: none; border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: .25s;
  box-shadow: var(--shadow-md);
  z-index: 100;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--primary-hover); }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 48px;
  font-size: .84rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
  .main { margin-left: 0; }
  .menu-toggle { display: block; }
}
@media (max-width: 640px) {
  .content { padding: 24px 20px 60px; }
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.3rem; }
  .hero { padding: 36px 0 24px; }
  .hero h1 { font-size: 2rem; }
  .card-grid { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .header-nav { display: none; }
}

/* ===== No-sidebar layout ===== */
.no-sidebar .main { margin-left: 0; }
.no-sidebar .sidebar { display: none; }
.no-sidebar .content { max-width: 960px; }

/* ===== Extension tag badge ===== */
.ext-tag {
  display: inline-block;
  font-size: .7em;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 1px 7px;
  margin-left: 6px;
  border-radius: 4px;
  vertical-align: middle;
  background: var(--primary-soft);
  color: var(--primary-hover);
  border: 1px solid rgba(99,102,241,.3);
  line-height: 1.6;
}
h1 .ext-tag {
  font-size: .4em;
  padding: 2px 8px;
  vertical-align: middle;
}
.search-hit .ext-tag {
  display: inline;
  font-size: .75em;
  padding: 0 5px;
  margin-left: 4px;
  vertical-align: baseline;
}
.sidebar-links .ext-tag {
  font-size: .65em;
  padding: 0 4px;
  margin-left: 4px;
  vertical-align: baseline;
}

/* ===== Highlight.js overrides ===== */
.hljs { background: transparent !important; padding: 0 !important; }
