/* AgentScope API manual — site styles
   Layout: fixed topbar, left sidebar, fluid article, right TOC.
   Language modes are driven by html[data-lang="mixed|zh|en"]. */

:root {
  --font-sans: "Segoe UI", "Inter", -apple-system, BlinkMacSystemFont, "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas,
    "Liberation Mono", Menlo, monospace;
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-code: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --text: #171b21;
  --text-soft: #3d4653;
  --muted: #64707f;
  --faint: #8b95a3;
  --border: #e3e7ec;
  --border-strong: #cdd4dd;
  --accent: #3157d5;
  --accent-hover: #2445b4;
  --accent-soft: #eef2ff;
  --accent-text: #2445b4;
  --green: #1a7f4b;
  --green-soft: #e8f6ee;
  --amber: #9a6400;
  --amber-soft: #fff5dc;
  --red: #b42318;
  --red-soft: #fdecea;
  --purple: #6b3fa0;
  --purple-soft: #f3ecfb;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 64px rgba(15, 23, 42, 0.18);
  --radius: 10px;
  --radius-sm: 6px;
  --topbar-h: 58px;
  --sidebar-w: 286px;
  --toc-w: 232px;
  --content-max: 1000px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0e1116;
  --bg-soft: #12161d;
  --bg-code: #161b23;
  --surface: #141920;
  --surface-2: #181e27;
  --text: #e8ecf2;
  --text-soft: #c3cbd6;
  --muted: #98a3b3;
  --faint: #75808f;
  --border: #242b36;
  --border-strong: #35404e;
  --accent: #7d9dff;
  --accent-hover: #a3baff;
  --accent-soft: #1a2340;
  --accent-text: #a8bcff;
  --green: #57c98a;
  --green-soft: #13291d;
  --amber: #e2b34d;
  --amber-soft: #2b2312;
  --red: #ff8a80;
  --red-soft: #2e1717;
  --purple: #c4a0f0;
  --purple-soft: #241a33;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 28px 72px rgba(0, 0, 0, 0.6);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }

body {
  margin: 0;
  padding-top: var(--topbar-h);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

code, kbd, pre, samp { font-family: var(--font-mono); font-size: 0.875em; }
code { background: var(--bg-code); border: 1px solid var(--border); border-radius: 5px; padding: 0.08em 0.36em; color: var(--text-soft); }
a > code { color: inherit; }
pre { margin: 0; }
pre code { background: none; border: 0; padding: 0; color: inherit; font-size: 12.75px; line-height: 1.6; }
kbd {
  display: inline-block; min-width: 1.5em; padding: 0.1em 0.4em; border: 1px solid var(--border-strong);
  border-bottom-width: 2px; border-radius: 5px; background: var(--surface-2); color: var(--muted);
  font-size: 11px; line-height: 1.3; text-align: center;
}
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
img { max-width: 100%; }

/* ---------- Top bar ---------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--topbar-h);
  display: flex; align-items: center; gap: 18px; padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); flex: none; }
.brand:hover { text-decoration: none; color: var(--text); }
.brand-mark {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #3157d5, #7c3aed); color: #fff;
  font: 700 13px/1 var(--font-sans); letter-spacing: 0.04em;
}
.brand-mark.large { width: 64px; height: 64px; border-radius: 18px; font-size: 24px; box-shadow: var(--shadow-md); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 15px; letter-spacing: -0.01em; }
.brand-text small { color: var(--muted); font-size: 11px; letter-spacing: 0.02em; }
.product-nav { display: flex; gap: 2px; margin-left: 6px; }
.product-link {
  padding: 6px 12px; border-radius: 7px; color: var(--text-soft); font-size: 13.5px; font-weight: 500;
}
.product-link:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.product-link.active { background: var(--accent-soft); color: var(--accent-text); }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.search-trigger {
  display: flex; align-items: center; gap: 8px; min-width: 210px; height: 34px; padding: 0 8px 0 10px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2);
  color: var(--muted); font: inherit; font-size: 13px; cursor: pointer;
}
.search-trigger:hover { border-color: var(--border-strong); color: var(--text-soft); }
.search-trigger .search-icon { font-size: 16px; line-height: 1; }
.search-trigger .search-label { flex: 1; text-align: left; }
.search-trigger.large { min-width: 360px; height: 46px; font-size: 14.5px; border-radius: 12px; padding: 0 14px; box-shadow: var(--shadow-sm); }
.search-trigger.large kbd { margin-left: auto; }

.lang-switch { display: flex; padding: 3px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2); }
.lang-switch button {
  border: 0; background: transparent; color: var(--muted); font: 600 11.5px/1 var(--font-sans);
  padding: 5px 8px; border-radius: 5px; cursor: pointer; letter-spacing: 0.02em;
}
.lang-switch button:hover { color: var(--text); }
.lang-switch button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }

.icon-button {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--surface-2); color: var(--text-soft); font-size: 15px; cursor: pointer;
}
.icon-button:hover { border-color: var(--border-strong); color: var(--text); }
.menu-toggle { display: none; }

/* ---------- Layout ---------- */
.layout {
  display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  gap: 40px; max-width: 1560px; margin: 0 auto; padding: 0 28px;
}
.sidebar {
  position: sticky; top: var(--topbar-h); align-self: start;
  height: calc(100vh - var(--topbar-h)); overflow-y: auto; overscroll-behavior: contain;
  padding: 14px 6px 48px 0; border-right: 1px solid var(--border);
  scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
.layout { transition: grid-template-columns 0.22s ease; }
.main { min-width: 0; padding-top: 26px; }
.article { max-width: var(--content-max); }
.toc {
  position: sticky; top: var(--topbar-h); align-self: start; max-height: calc(100vh - var(--topbar-h));
  overflow-y: auto; padding: 27px 0 40px; font-size: 12.5px;
}
.toc-title { font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--faint); margin-bottom: 10px; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc li { margin: 0; }
.toc a { display: block; padding: 4px 0 4px 12px; color: var(--muted); border-left: 2px solid transparent; margin-left: -1px; }
.toc a:hover { color: var(--text); text-decoration: none; border-left-color: var(--border-strong); }
.toc a.active { color: var(--accent-text); border-left-color: var(--accent); font-weight: 600; }

.skip-link {
  position: fixed; left: 12px; top: -60px; z-index: 100; padding: 8px 14px; border-radius: 8px;
  background: var(--accent); color: #fff; transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- Sidebar ---------- */
.sidebar-toggle {
  position: sticky; top: 0; z-index: 2;
  display: flex; align-items: center; gap: 8px; width: 100%; margin: 0 0 10px;
  padding: 6px 10px; border: 1px solid transparent; border-radius: 8px;
  background: var(--bg); color: var(--faint); font: 600 11px/1 var(--font-sans);
  letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer;
}
.sidebar-toggle:hover { background: var(--bg-soft); color: var(--text-soft); }
.sidebar-toggle-icon { font-size: 15px; line-height: 1; }
.sidebar-toggle-text { flex: 1; text-align: left; }
.sidebar-body { min-width: 0; }
.sidebar-site {
  font-weight: 700; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--faint); padding: 0 10px 10px;
}
.sidebar-links { display: flex; flex-direction: column; gap: 1px; margin-bottom: 18px; }
.sidebar-links a {
  padding: 6px 10px; border-radius: 7px; color: var(--text-soft); font-size: 13.5px;
}
.sidebar-links a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.sidebar-links a.active { background: var(--accent-soft); color: var(--accent-text); font-weight: 600; }
.sidebar-title {
  margin: 18px 10px 6px; font-weight: 700; font-size: 11px; letter-spacing: 0.07em;
  text-transform: uppercase; color: var(--faint); display: flex; align-items: center; gap: 6px;
}
.sidebar-types, .sidebar-packages { display: flex; flex-direction: column; gap: 1px; }
.sidebar-types a {
  padding: 4px 10px 4px 20px; border-radius: 6px; color: var(--text-soft); font-size: 12.75px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sidebar-types a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.sidebar-types a.active { color: var(--accent-text); background: var(--accent-soft); font-weight: 600; }
.sidebar-packages a {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 3.5px 10px 3.5px calc(10px + var(--depth, 0) * 9px); border-radius: 6px;
  color: var(--muted); font-size: 12px; font-family: var(--font-mono);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sidebar-packages a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.sidebar-packages a.active { color: var(--accent-text); background: var(--accent-soft); font-weight: 600; }
.sidebar-packages .count { font-size: 10.5px; color: var(--faint); background: var(--bg-soft); border-radius: 20px; padding: 0 6px; }

/* ---------- Breadcrumb / tabs ---------- */
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0 0 14px; font-size: 12.5px; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--faint); }
.breadcrumb .current { color: var(--text-soft); font-weight: 500; }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin: 0 0 26px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: 8px 12px; border-bottom: 2px solid transparent; color: var(--muted);
  font-size: 13px; white-space: nowrap; margin-bottom: -1px;
}
.tab:hover { color: var(--text); text-decoration: none; }
.tab.active { color: var(--accent-text); border-bottom-color: var(--accent); font-weight: 600; }

/* ---------- Article basics ---------- */
.article { padding-bottom: 72px; }
.article h1 { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.2; letter-spacing: -0.025em; margin: 4px 0 14px; overflow-wrap: anywhere; }
.article h2 {
  font-size: 19px; line-height: 1.35; letter-spacing: -0.01em; margin: 42px 0 12px;
  padding-bottom: 7px; border-bottom: 1px solid var(--border);
}
.article h3 { font-size: 16px; margin: 26px 0 8px; }
.article h4 { font-size: 14px; margin: 18px 0 6px; }
.article p { margin: 0 0 12px; color: var(--text-soft); }
.article ul, .article ol { margin: 0 0 14px; padding-left: 22px; color: var(--text-soft); }
.article li { margin: 3px 0; }
.article li > code { white-space: nowrap; }
.article blockquote {
  margin: 16px 0; padding: 10px 16px; border-left: 3px solid var(--accent);
  background: var(--accent-soft); color: var(--text-soft); border-radius: 0 8px 8px 0;
}
.article table { border-collapse: collapse; width: 100%; margin: 10px 0 18px; font-size: 13px; }
.article th, .article td { border: 1px solid var(--border); padding: 7px 10px; text-align: left; vertical-align: top; }
.article th { background: var(--surface-2); font-weight: 600; color: var(--text-soft); }
.article pre { background: var(--bg-code); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; overflow-x: auto; margin: 10px 0 16px; }
.article pre.example { border-left: 3px solid var(--green); }

/* ---------- Curated deep dives ---------- */
.deepdive {
  margin: 28px 0 10px; padding: 18px 22px 12px;
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--surface-2); border-radius: 0 10px 10px 0;
}
.deepdive h2 {
  margin: 0 0 6px; padding: 0; border-bottom: 0; font-size: 13px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
}
.deepdive-title { margin: 0 0 10px; font-size: 18px; line-height: 1.35; }
.deepdive-summary p { margin-bottom: 8px; }
.deepdive-points { padding-left: 20px; margin-bottom: 10px; }
.deepdive-points li { margin: 6px 0; }
.deepdive-example { margin-top: 6px; }
.deepdive-example pre { margin-bottom: 10px; }

.lede { font-size: 16.5px; color: var(--muted); max-width: 76ch; margin: 0 0 22px; }
.muted { color: var(--faint); }
.ok { color: var(--green); }
.warn { color: var(--red); }
.hero { padding: 16px 0 8px; }
.hero h1 { margin-top: 10px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.button {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-soft);
  font-size: 13.5px; font-weight: 500;
}
.button:hover { border-color: var(--border-strong); color: var(--text); text-decoration: none; box-shadow: var(--shadow-sm); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin: 26px 0 6px; max-width: 760px; }
.stat-grid > div {
  display: flex; flex-direction: column; gap: 2px; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-2);
}
.stat-grid strong { font-size: 22px; letter-spacing: -0.02em; }
.stat-grid span { font-size: 12px; color: var(--muted); }
.stat-grid.compact { grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); margin: 16px 0; }

.entry-list { columns: 2; column-gap: 28px; }
.entry-list li { break-inside: avoid; margin: 0 0 6px; }
@media (max-width: 860px) { .entry-list { columns: 1; } }

/* ---------- Type header / signatures ---------- */
.type-kicker {
  display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted);
  letter-spacing: 0.02em; margin-bottom: 6px;
}
.type-kicker code { font-size: 11.5px; }
.signature {
  background: var(--bg-code); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 8px; padding: 13px 16px; overflow-x: auto; margin: 14px 0 18px;
}
.signature code { font-size: 13px; white-space: pre-wrap; overflow-wrap: anywhere; background: none; border: 0; padding: 0; }
.signature-inline { font-size: 12.5px; white-space: normal; overflow-wrap: anywhere; }
.signature.declaration { font-size: 13.5px; }
.decorator { color: var(--muted); font-family: var(--font-mono); font-size: 12px; margin-bottom: 4px; }

.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: -4px 0 10px; }
.badge, .artifact-badge .badge {
  display: inline-flex; align-items: center; gap: 4px; padding: 1px 7px; border-radius: 20px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--muted);
  font: 600 10.5px/1.7 var(--font-sans); letter-spacing: 0.02em; text-transform: lowercase;
}
.badge-deprecated { color: var(--red); background: var(--red-soft); border-color: color-mix(in srgb, var(--red) 25%, transparent); }
.badge-async { color: var(--purple); background: var(--purple-soft); border-color: color-mix(in srgb, var(--purple) 25%, transparent); }
.badge-abstract { color: var(--amber); background: var(--amber-soft); border-color: color-mix(in srgb, var(--amber) 25%, transparent); }
.badge-kw { color: var(--accent-text); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 25%, transparent); }
.badge-line { font-family: var(--font-mono); }
.badge-line.preview { color: var(--amber); background: var(--amber-soft); }
.badge-line.legacy { color: var(--muted); }
.badge-line{ color: var(--green); background: var(--green-soft); }
.artifact-badge { margin-left: 4px; }
.artifact-badge:hover { text-decoration: none; }

.kind {
  display: inline-flex; align-items: center; padding: 1px 7px; border-radius: 5px;
  background: var(--accent-soft); color: var(--accent-text); font: 600 10.5px/1.7 var(--font-sans);
  letter-spacing: 0.03em; text-transform: uppercase;
}
.kind-interface { background: var(--purple-soft); color: var(--purple); }
.kind-enum { background: var(--amber-soft); color: var(--amber); }
.kind-record { background: var(--green-soft); color: var(--green); }
.kind-annotation { background: var(--red-soft); color: var(--red); }
.kind-function, .kind-method, .kind-constructor { background: var(--accent-soft); color: var(--accent-text); }
.kind-note { margin-top: 3px; }
.kind-note .kind { padding: 0 5px; font-size: 9.5px; opacity: 0.85; }

.source {
  font-size: 11.5px; color: var(--faint); margin: 8px 0 16px; display: flex; align-items: center; gap: 6px;
}
.source code { font-size: 11px; background: transparent; border: 0; padding: 0; color: var(--faint); }

/* ---------- Summary tables ---------- */
.summary-section { margin-top: 6px; }
.summary-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.summary-table th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--faint); font-weight: 600; padding: 6px 10px; border-bottom: 1px solid var(--border);
}
.summary-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.summary-table tbody tr:hover { background: var(--surface-2); }
.summary-table.wide { table-layout: auto; }
.name-cell { width: 38%; }
.summary-table .summary-cell { color: var(--muted); font-size: 12.5px; }
.summary-table .summary-cell .lang-block { font-size: 12.5px; }
.summary-table .type-cell, .summary-table .value-cell { font-size: 12px; color: var(--text-soft); overflow-wrap: anywhere; }
.summary-table .num { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); white-space: nowrap; }

/* ---------- Member details ---------- */
.detail-section { margin-top: 8px; }
.member {
  padding: 4px 0 18px; margin: 0 0 18px; border-bottom: 1px solid var(--border);
}
.member:last-child { border-bottom: 0; }
.member-name { font-size: 16px; letter-spacing: -0.01em; margin: 14px 0 2px; overflow-wrap: anywhere; }
.member-name a { color: inherit; }
.member > .signature { margin: 8px 0 10px; }
.member .lang-block { font-size: 13.5px; }
.mini-title { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--faint); margin: 14px 0 6px; }
.notes { margin: 4px 0 10px; padding-left: 20px; font-size: 13px; }
.example { font-size: 12px; }

.params { margin: 12px 0 8px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.params-title {
  padding: 6px 12px; background: var(--surface-2); border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--faint);
}
.params-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.params-table th {
  text-align: left; padding: 6px 12px; font-size: 10.5px; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--faint); border-bottom: 1px solid var(--border);
}
.params-table td { padding: 7px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.params-table tr:last-child td { border-bottom: 0; }
.param-name { white-space: nowrap; }
.param-name .badge, .param-name .default { margin-left: 5px; }
.param-type { color: var(--text-soft); overflow-wrap: anywhere; }
.param-doc { color: var(--muted); }
.default { font-size: 11px; color: var(--faint); }
.returns, .raises, .since, .deprecated-note, .see {
  margin: 8px 0; font-size: 13px; color: var(--text-soft);
}
.meta-label {
  font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--faint); margin-right: 8px;
}
.return-type { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-soft); }
.return-doc { margin-top: 3px; }
.raises ul { margin: 4px 0 0; padding-left: 20px; }
.deprecated-note { padding: 8px 12px; border: 1px solid color-mix(in srgb, var(--red) 25%, transparent); background: var(--red-soft); border-radius: 8px; }
.deprecated-note strong { color: var(--red); margin-right: 6px; }
.see { font-size: 12.5px; }

.inherited-group { margin: 10px 0 16px; }
.inherited-links { margin-top: 4px; font-size: 12px; line-height: 2; }
.inherited-links a { margin-right: 4px; }

.external-base { color: var(--muted); font-size: 12px; }
.meta-row { margin: 6px 0 12px; font-size: 12.5px; color: var(--muted); }
.meta-table { border-collapse: collapse; font-size: 13px; width: 100%; }
.meta-table th { text-align: left; font-weight: 500; color: var(--muted); padding: 6px 12px 6px 0; border-bottom: 1px solid var(--border); width: 58%; }
.meta-table td { padding: 6px 0; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.package-children { columns: 2; margin: 8px 0 16px; }
.package-children li { margin: 3px 0; }

/* ---------- Index pages ---------- */
.letter-nav { display: flex; flex-wrap: wrap; gap: 4px; margin: 12px 0 22px; }
.letter-nav a {
  display: grid; place-items: center; min-width: 26px; height: 26px; padding: 0 6px;
  border: 1px solid var(--border); border-radius: 6px; font-size: 11.5px; color: var(--muted);
}
.letter-nav a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.index-letter { font-size: 18px; font-weight: 700; margin: 30px 0 8px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.index-entry { display: flex; gap: 10px; align-items: baseline; padding: 4px 0; font-size: 13px; flex-wrap: wrap; }
.index-name { font-family: var(--font-mono); font-size: 12.5px; }
.index-package { font-size: 11.5px; color: var(--faint); font-family: var(--font-mono); }
.index-members { font-size: 11.5px; color: var(--faint); }
.class-tree { font-size: 12.5px; line-height: 1.9; }
.class-tree ul { list-style: none; padding-left: 18px; border-left: 1px dashed var(--border); margin: 2px 0; }
.class-tree > ul { padding-left: 0; border-left: 0; }
.class-tree li { margin: 1px 0; }
.class-tree code { background: none; border: 0; padding: 0; }

/* ---------- Landing ---------- */
.landing-hero { text-align: center; padding: 48px 0 26px; }
.brand-xl { display: flex; justify-content: center; margin-bottom: 18px; }
.landing-hero .type-kicker { justify-content: center; }
.landing-hero h1 { font-size: clamp(32px, 5vw, 48px); margin: 8px 0 16px; }
.landing-hero .lede { margin: 0 auto 24px; max-width: 60ch; }
.landing-search { display: flex; justify-content: center; margin: 0 0 12px; }
.portal-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; margin: 26px 0 8px; }
.portal-card {
  display: flex; flex-direction: column; gap: 8px; padding: 24px; border: 1px solid var(--border);
  border-radius: 14px; background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.portal-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--border-strong); text-decoration: none; color: var(--text); }
.portal-icon {
  display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 11px;
  background: var(--accent-soft); color: var(--accent-text); font: 700 14px/1 var(--font-mono);
}
.portal-card h2 { margin: 4px 0 0; font-size: 21px; border: 0; padding: 0; }
.portal-version { font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); }
.portal-stats { font-size: 12px; color: var(--muted); }
.portal-card p { margin: 4px 0 0; font-size: 13.5px; color: var(--muted); }
.portal-cta { margin-top: 8px; color: var(--accent-text); font-size: 13px; font-weight: 600; }
.landing-notes { max-width: 900px; margin-top: 34px; }

/* ---------- Guides / coverage ---------- */
.guide h1 { font-size: clamp(28px, 3.4vw, 36px); }
.guide .lang-block > h1, .guide .lang-block > h2, .guide .lang-block > h3 { border: 0; padding: 0; }
.coverage-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; margin: 22px 0; }
.coverage-card { border: 1px solid var(--border); border-radius: 12px; padding: 6px 20px 14px; background: var(--surface); }
.coverage-card h2 { border: 0; font-size: 17px; margin: 14px 0 6px; }
.prose h2 { font-size: 19px; margin-top: 34px; }
.prose p, .prose li { color: var(--text-soft); }
.prose code, .article code { overflow-wrap: anywhere; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--content-max); margin-top: 40px; padding: 22px 0 48px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
}
.footer .muted { margin-top: 4px; font-size: 11.5px; }

/* ---------- Language modes ---------- */
/* UI chrome: mixed and zh show Chinese, en shows English. */
html[data-lang="zh"] .ui-en, html[data-lang="mixed"] .ui-en { display: none; }
html[data-lang="en"] .ui-zh { display: none; }

/* Content blocks. Paired Chinese + English. */
.lang-block { margin: 0 0 10px; }
html[data-lang="mixed"] .lang-block.lang-zh { display: block; }
html[data-lang="mixed"] .lang-block.lang-en { display: block; color: var(--muted); font-size: 0.94em; }
html[data-lang="mixed"] .lang-block.lang-en.only { color: var(--text-soft); font-size: 1em; }
html[data-lang="mixed"] .lang-block.lang-en > p:last-child, html[data-lang="mixed"] .lang-block.lang-zh > p:last-child { margin-bottom: 0; }

html[data-lang="zh"] .lang-block.lang-en { display: none; }
html[data-lang="zh"] .lang-block.lang-en.only { display: block; }
html[data-lang="zh"] .lang-block.lang-en.only::before {
  content: "EN"; display: inline-block; margin-bottom: 4px; padding: 0 5px; border-radius: 4px;
  background: var(--amber-soft); color: var(--amber); font: 700 9.5px/1.6 var(--font-sans);
  letter-spacing: 0.06em; vertical-align: 1px;
}
html[data-lang="zh"] .lang-block.lang-zh { display: block; }
html[data-lang="zh"] .lang-block.lang-zh.only { display: block; }

html[data-lang="en"] .lang-block.lang-zh { display: none; }
html[data-lang="en"] .lang-block.lang-en { display: block; }
html[data-lang="en"] .lang-block.lang-en { color: inherit; }

/* Inline pairs (parameter docs, table cells). */
.lang-inline { display: inline; }
html[data-lang="mixed"] .lang-inline.lang-en { color: var(--muted); }
html[data-lang="mixed"] .lang-inline.lang-en::before { content: " · "; color: var(--faint); }
html[data-lang="mixed"] .lang-inline.lang-en.only::before { content: ""; }
html[data-lang="zh"] .lang-inline.lang-en { display: none; }
html[data-lang="zh"] .lang-inline.lang-en.only { display: inline; }
html[data-lang="zh"] .lang-inline.lang-en.only::after {
  content: "EN"; margin-left: 4px; padding: 0 4px; border-radius: 3px;
  background: var(--amber-soft); color: var(--amber); font: 700 9px/1.5 var(--font-sans);
}
html[data-lang="en"] .lang-inline.lang-zh { display: none; }
html[data-lang="en"] .lang-inline.lang-en { display: inline; color: inherit; }

/* Summary cells stack translations compactly. */
.summary-table .lang-block { display: block; margin: 0; }
.summary-table .lang-block.lang-en { color: var(--faint); }

/* ---------- Search overlay ---------- */
.search-overlay {
  position: fixed; inset: 0; z-index: 100; display: flex; align-items: flex-start; justify-content: center;
  padding: 9vh 20px 20px; background: rgba(10, 14, 20, 0.48); backdrop-filter: blur(6px);
}
.search-overlay[hidden] { display: none !important; }
.search-dialog {
  width: min(720px, 100%); max-height: 76vh; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: 14px;
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.search-box { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.search-box .search-icon { font-size: 20px; color: var(--muted); }
.search-box input {
  flex: 1; min-width: 0; border: 0; background: transparent; color: var(--text);
  font: 400 16px/1.4 var(--font-sans); outline: none;
}
.search-box input::placeholder { color: var(--faint); }
.search-results { overflow-y: auto; padding: 6px; }
.search-result {
  display: block; padding: 9px 12px; border-radius: 8px; color: var(--text);
}
.search-result:hover, .search-result.active { background: var(--accent-soft); text-decoration: none; color: var(--text); }
.search-result .sr-head { display: flex; align-items: baseline; gap: 8px; }
.search-result .sr-title { font-weight: 600; font-size: 13.5px; }
.search-result .sr-kind { font-size: 10px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--faint); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px; }
.search-result .sr-body { font-size: 12px; color: var(--muted); margin-top: 2px; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.search-result mark { background: color-mix(in srgb, var(--accent) 22%, transparent); color: inherit; border-radius: 2px; padding: 0 1px; }
.search-empty { padding: 32px 16px; text-align: center; color: var(--muted); font-size: 13px; }
.search-hint {
  display: flex; gap: 18px; padding: 8px 14px; border-top: 1px solid var(--border);
  background: var(--surface-2); color: var(--faint); font-size: 11px;
}
.search-hint span { display: flex; align-items: center; gap: 4px; }

/* ---------- Deep dive index ---------- */
.deepdive-group { margin: 22px 0 6px; }
.deepdive-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px; }
.deepdive-item {
  display: block; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text); text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.deepdive-item:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.deepdive-item-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.deepdive-item-head code { font-size: 14px; font-weight: 650; color: var(--accent-text); }
.deepdive-item-head span { color: var(--faint); font-size: 11.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.deepdive-item-title { font-weight: 600; margin-bottom: 4px; }
.deepdive-item .lang-block { margin: 0; font-size: 12.5px; color: var(--muted); }
.deepdive-item .lang-block.lang-zh { color: var(--text-soft); }

/* ---------- Responsive ---------- */
@media (max-width: 1360px) {
  :root { --sidebar-w: 260px; --toc-w: 210px; }
  .layout { gap: 28px; padding: 0 22px; }
}
@media (max-width: 1180px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 920px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 0 20px; }
  .sidebar {
    position: fixed; inset: var(--topbar-h) auto 0 0; z-index: 40; width: min(320px, 86vw);
    height: calc(100vh - var(--topbar-h));
    height: calc(100dvh - var(--topbar-h));
    padding: 18px 14px 40px; background: var(--bg); border-right: 1px solid var(--border);
    transform: translateX(-102%); transition: transform 0.18s ease; box-shadow: var(--shadow-lg);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  body.nav-open::after {
    content: ""; position: fixed; inset: var(--topbar-h) 0 0 0; z-index: 35; background: rgba(10, 14, 20, 0.42);
  }
  .menu-toggle { display: inline-grid; }
  .sidebar-toggle { display: none; }
  .brand-text small { display: none; }
  .search-trigger { min-width: 0; width: 34px; padding: 0; justify-content: center; }
  .search-trigger .search-label, .search-trigger kbd { display: none; }
  .search-trigger.large { width: 100%; min-width: 0; padding: 0 14px; justify-content: flex-start; }
  .search-trigger.large .search-label, .search-trigger.large kbd { display: inline; }
  .product-nav { margin-left: 0; }
  .brand-text { display: none; }
  .landing-hero { padding-top: 24px; }
  /* Data tables become their own scroll containers; a wide API table would otherwise
     force the whole document sideways and put columns out of reach.
     .meta-table is a short key/value grid that always fits, so it keeps table layout. */
  table:not(.meta-table) {
    display: block; width: 100%; overflow-x: auto;
    -webkit-overflow-scrolling: touch; scrollbar-width: thin;
  }
  table:not(.meta-table) code { white-space: nowrap; }
}
@media (max-width: 640px) {
  :root { --topbar-h: 106px; }
  .topbar {
    flex-wrap: wrap; align-content: center; gap: 8px 10px;
    padding: 7px 12px; height: var(--topbar-h);
  }
  .menu-toggle { order: 1; }
  .brand { order: 2; }
  .topbar-actions { order: 3; }
  .product-nav {
    order: 4; flex: 1 0 100%; margin: 0; gap: 2px;
    overflow-x: auto; scrollbar-width: none;
  }
  .product-nav::-webkit-scrollbar { display: none; }
  .product-link { flex: 1 0 auto; padding: 5px 8px; font-size: 12.5px; text-align: center; }
  .lang-switch button { padding: 5px 6px; }
  .layout { padding: 0 14px; }
  .article h1 { font-size: 27px; }
  .summary-table .name-cell { width: auto; }
  .summary-table th, .summary-table td { padding: 6px; }
  .portal-grid { grid-template-columns: 1fr; }
  .search-overlay { padding: 0; align-items: stretch; }
  .search-dialog { max-height: none; height: 100vh; height: 100dvh; border-radius: 0; border: 0; }
  .search-hint { display: none; }
  .footer { padding-bottom: 32px; }
}

/* ---------- Touch targets ----------
   Thumb-reachable chrome: the earlier 22-27px hit areas were miss-prone on a phone. */
@media (max-width: 920px) {
  .menu-toggle, .icon-button, .search-trigger, .brand { min-width: 40px; min-height: 40px; }
  .lang-switch button { min-height: 34px; padding: 0 11px; }
  .product-link {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 40px; padding: 0 11px;
  }
  .tab { min-height: 40px; display: inline-flex; align-items: center; }
  .breadcrumb a, .breadcrumb .current { padding: 9px 4px; }
  .sidebar-links a, .sidebar-toggle { min-height: 42px; display: flex; align-items: center; }
  .sidebar-types a, .sidebar-packages a { min-height: 38px; display: flex; align-items: center; }
  .search-result { min-height: 48px; }
}

/* ---------- Collapsible sidebar rail (desktop) ---------- */
@media (min-width: 921px) {
  html[data-sidebar="collapsed"] { --sidebar-w: 58px; }
  html[data-sidebar="collapsed"] .sidebar {
    display: flex; flex-direction: column; padding: 8px 0 18px; overflow: hidden;
  }
  html[data-sidebar="collapsed"] .sidebar-body { display: none; }
  html[data-sidebar="collapsed"] .sidebar-toggle {
    position: static; flex: 1; width: auto; margin: 0; padding: 10px 0; gap: 0;
    flex-direction: column; align-items: center;
    border: 0; border-radius: 0; background: transparent; color: var(--muted);
  }
  html[data-sidebar="collapsed"] .sidebar-toggle:hover {
    background: var(--bg-soft); color: var(--accent-text);
  }
  html[data-sidebar="collapsed"] .sidebar-toggle-icon {
    display: grid; place-items: center; flex: none; width: 32px; height: 32px;
    border: 1px solid var(--border); border-radius: 9px; background: var(--surface);
    box-shadow: var(--shadow-sm); font-size: 15px;
  }
  html[data-sidebar="collapsed"] .sidebar-toggle:hover .sidebar-toggle-icon {
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    background: var(--accent-soft);
  }
  html[data-sidebar="collapsed"] .sidebar-toggle-text {
    margin-top: 14px; writing-mode: vertical-rl; text-orientation: mixed;
    letter-spacing: 0.34em; text-transform: none; font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .layout, .sidebar-toggle, .flashcard-inner { transition: none !important; }
}

@media print {
  body { padding-top: 0; }
  .topbar, .sidebar, .toc, .search-overlay, .footer, .tabs, .breadcrumb { display: none !important; }
  .layout { display: block; padding: 0; }
  .main { padding: 0; }
  .article { max-width: none; }
  a { color: inherit; text-decoration: none; }
  .signature, pre { border: 1px solid #ccc; }
}