:root {
  color-scheme: light;
  --brand: #1800ad;
  --brand-2: #0f007a;
  --brand-3: #1800ad;
  --brand-soft: #eef1ff;
  --ink: #0b0f1c;
  --ink-2: #333a4a;
  --muted: #5f6880;
  --faint: #858da3;
  --line: #e3e6ef;
  --line-strong: #d3d8e6;
  --bg: #fbfcff;
  --paper: #ffffff;
  --paper-2: #f7f9fd;
  --navy: #080a17;
  --green: #087a55;
  --amber: #a45a00;
  --red: #b42334;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 18px 50px rgba(15, 30, 90, 0.07);
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, "Liberation Mono", monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --topbar-h: 64px;
  --sidebar-w: 264px;
  --toc-w: 216px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.nav-open, body.search-open { overflow: hidden; }
::selection { background: var(--brand); color: #fff; }
a { color: var(--brand); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brand-2); }
button, input { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1000;
  background: var(--brand);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.16s ease;
}
.skip-link:focus { top: 12px; color: #fff; }

/* ---------------------------------- topbar --------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  background: rgba(252, 252, 254, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.topbar-inner {
  height: 100%;
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  padding: 9px;
  flex-direction: column;
  justify-content: space-between;
}
.menu-toggle span { display: block; height: 1.5px; background: var(--ink); border-radius: 2px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  flex: 0 0 auto;
}
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 27px;
  height: 27px;
  fill: currentColor;
  color: var(--brand);
}
.brand-text {
  display: flex;
  align-items: baseline;
  gap: 7px;
  line-height: 1;
  letter-spacing: -0.03em;
}
.brand-text strong { font-size: 20px; font-weight: 900; letter-spacing: -0.045em; }
.brand-text span { font-size: 13px; font-weight: 600; color: var(--muted); letter-spacing: 0.01em; }
.topbar-divider { width: 1px; height: 20px; background: var(--line-strong); margin-left: 2px; }
.topbar-context { color: var(--muted); font-size: 13px; font-weight: 500; }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 20px; }
.topbar-link {
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.topbar-link:hover { color: var(--brand); }
.topbar-link span { font-size: 11px; color: var(--faint); }
.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 196px;
  height: 36px;
  padding: 0 10px 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #fff;
  color: var(--muted);
  font-size: 13px;
  text-align: left;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.search-trigger:hover { border-color: var(--brand-3); box-shadow: 0 0 0 3px rgba(24, 0, 173, 0.06); }
.search-trigger kbd { margin-left: auto; }
kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 21px;
  height: 21px;
  padding: 0 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--paper-2);
  color: var(--muted);
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 700;
  line-height: 1;
}
.search-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  position: relative;
}
.search-icon::before {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border: 2px solid currentColor;
  border-radius: 50%;
  left: 2px;
  top: 2px;
}
.search-icon::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform: rotate(45deg);
  left: 11px;
  top: 12px;
}

/* ---------------------------------- shell ---------------------------------- */
.shell {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  align-items: start;
}
.sidebar {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  border-right: 1px solid var(--line);
  padding: 26px 22px 34px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.sidebar-inner { min-height: 100%; display: flex; flex-direction: column; }
.sidebar-note {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 0 0 24px;
  padding: 12px 14px;
  border: 1px solid #d8def7;
  border-radius: 11px;
  background: #f7f9ff;
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--muted);
}
.sidebar-note-label {
  color: var(--brand);
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.sidebar-note strong { color: var(--ink); font-size: 13px; font-weight: 700; }
.nav-group { margin-bottom: 24px; }
.nav-label {
  margin: 0 0 8px 11px;
  color: var(--faint);
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.nav-list { list-style: none; margin: 0; padding: 0; }
.nav-link {
  display: flex;
  align-items: center;
  min-height: 33px;
  padding: 5px 11px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.35;
  text-decoration: none;
  position: relative;
  transition: background 0.14s ease, color 0.14s ease;
}
.nav-link:hover { background: #f3f5fb; color: var(--ink); }
.nav-link.is-active { background: var(--brand-soft); color: var(--brand); font-weight: 700; }
.nav-link.is-active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 3px;
  background: var(--brand);
}
.sidebar-bottom {
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sidebar-bottom a {
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
}
.sidebar-bottom a:hover { color: var(--brand); }
.sidebar-bottom span { color: var(--faint); font-size: 10px; }

.main {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--toc-w);
  gap: 0;
}
.doc {
  min-width: 0;
  padding: 42px 52px 88px;
  max-width: 900px;
  width: 100%;
}
.doc-home { max-width: 1040px; padding-top: 30px; }
.doc-content { min-width: 0; }

/* -------------------------------- home hero -------------------------------- */
.home-hero {
  position: relative;
  overflow: hidden;
  padding: 54px 48px;
  border-radius: 20px;
  background: var(--brand);
  color: #fff;
  box-shadow: 0 24px 60px rgba(24, 0, 173, 0.18);
  margin-bottom: 44px;
}
.hero-copy { position: relative; max-width: 760px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.14);
}
.home-hero h1 {
  margin: 0;
  max-width: 590px;
  color: #fff;
  font-size: clamp(41px, 4.4vw, 61px);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.98;
}
.hero-lede {
  max-width: 620px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 15.5px;
  line-height: 1.65;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 27px; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 0 17px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.14s ease, background 0.14s ease, border-color 0.14s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { background: #fff; color: var(--brand); }
.button-primary:hover { background: #eef1ff; color: var(--brand); }
.button-ghost { border: 1px solid rgba(255, 255, 255, 0.55); color: #fff; }
.button-ghost:hover { border-color: #fff; color: var(--brand); background: #fff; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 25px; color: rgba(255, 255, 255, 0.7); font-size: 10.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta span::before { content: ""; width: 3px; height: 3px; background: rgba(255, 255, 255, 0.55); border-radius: 50%; }

/* -------------------------------- page header ------------------------------- */
.page-header { margin-bottom: 34px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.breadcrumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 22px; color: var(--faint); font-size: 11.5px; font-weight: 600; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--brand); }
.crumb-sep { color: #bcc6d4; }
.page-kicker { margin-bottom: 10px; color: var(--brand); font-size: 10.5px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; }
.page-header h1 { margin: 0; color: var(--ink); font-size: clamp(34px, 3.7vw, 47px); font-weight: 800; letter-spacing: -0.045em; line-height: 1.06; }
.page-description { max-width: 700px; margin: 15px 0 0; color: var(--muted); font-size: 16px; line-height: 1.62; }
.page-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 20px; color: var(--faint); font-size: 11px; font-weight: 600; }
.page-meta span { display: inline-flex; align-items: center; gap: 6px; }
.page-meta span::before { content: ""; width: 3px; height: 3px; border-radius: 50%; background: #b3bdcc; }

/* --------------------------------- content --------------------------------- */
.doc-content { color: var(--ink-2); font-size: 15.5px; line-height: 1.72; }
.doc-content > :first-child { margin-top: 0 !important; }
.doc-content h2 {
  position: relative;
  margin: 46px 0 14px;
  color: var(--ink);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.2;
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}
.doc-content h3 {
  position: relative;
  margin: 32px 0 10px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.025em;
  line-height: 1.3;
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}
.doc-content h4 { margin: 26px 0 8px; color: var(--ink); font-size: 15.5px; font-weight: 750; scroll-margin-top: calc(var(--topbar-h) + 18px); }
.heading-anchor {
  position: absolute;
  left: -22px;
  top: 0.06em;
  color: #aab2c5;
  font-size: 0.72em;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.14s ease;
}
h2:hover .heading-anchor, h3:hover .heading-anchor, .heading-anchor:focus { opacity: 1; }
.doc-content p { margin: 13px 0; }
.doc-content a { font-weight: 550; }
.doc-content strong { color: var(--ink); font-weight: 700; }
.doc-content ul, .doc-content ol { margin: 12px 0; padding-left: 22px; }
.doc-content li { margin: 6px 0; }
.doc-content li::marker { color: #8f9ab5; }
.doc-content hr { border: 0; border-top: 1px solid var(--line); margin: 38px 0; }
.doc-content blockquote {
  margin: 22px 0;
  padding: 15px 18px;
  border-left: 3px solid var(--brand);
  border-radius: 0 9px 9px 0;
  background: #f7f9ff;
  color: var(--ink-2);
}
.doc-content blockquote p { margin: 0; }
.doc-content blockquote p + p { margin-top: 10px; }
.doc-content blockquote strong { color: var(--brand); }
.doc-content img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--line); }
.doc-content code:not(pre code) {
  padding: 2px 5px;
  border: 1px solid #e1e5f2;
  border-radius: 5px;
  background: #f5f7ff;
  color: var(--brand);
  font-family: var(--mono);
  font-size: 0.86em;
  overflow-wrap: anywhere;
}
.doc-content table {
  width: 100%;
  margin: 22px 0;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.5;
}
.doc-content thead { background: #f6f8fc; }
.doc-content th { color: var(--ink); font-size: 10.5px; font-weight: 800; letter-spacing: 0.075em; text-transform: uppercase; text-align: left; }
.doc-content th, .doc-content td { padding: 10px 13px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc-content tr:last-child td { border-bottom: 0; }
.doc-content tbody tr:hover { background: #fbfcff; }
.doc-content td code { white-space: nowrap; }

/* -------------------------------- code blocks ------------------------------- */
.code-block {
  margin: 22px 0;
  border: 1px solid #20233b;
  border-radius: 10px;
  overflow: hidden;
  background: #0b0d19;
  box-shadow: 0 10px 30px rgba(11, 13, 25, 0.08);
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 34px;
  padding: 0 10px 0 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: #111426;
  color: #7d82a3;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.copy-code {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.03);
  color: #a8acc4;
  padding: 3px 8px;
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}
.copy-code:hover { border-color: rgba(255, 255, 255, 0.3); color: #fff; }
.copy-code.is-copied { color: #66d7ac; border-color: rgba(102, 215, 172, 0.4); }
.code-block pre { margin: 0; padding: 16px 18px 18px; overflow-x: auto; background: transparent; }
.code-block code { display: block; color: #d7d9e8; font-family: var(--mono); font-size: 12px; line-height: 1.7; tab-size: 2; }
.hljs { color: #d7d9e8; }
.hljs-comment, .hljs-quote { color: #686d8c; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-literal, .hljs-section, .hljs-link { color: #9db7ff; }
.hljs-string, .hljs-attr, .hljs-template-variable, .hljs-addition { color: #8fe3bd; }
.hljs-number, .hljs-symbol, .hljs-bullet, .hljs-variable { color: #e7bf8d; }
.hljs-title, .hljs-title.function_, .hljs-function .hljs-title, .hljs-built_in { color: #8cc8ff; }
.hljs-type, .hljs-class .hljs-title { color: #f2a8cb; }
.hljs-deletion { color: #ff9da7; }
.hljs-meta { color: #9db7ff; }

/* --------------------------------- diagrams --------------------------------- */
.diagram {
  margin: 26px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
}
.diagram-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.diagram-source-label { color: #93a0bd; font-weight: 600; letter-spacing: 0.06em; }
.diagram pre.mermaid {
  margin: 0;
  padding: 24px 16px;
  overflow-x: auto;
  background: transparent;
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: transparent;
}
.diagram pre.mermaid[data-processed="true"] { color: inherit; }
.diagram pre.mermaid svg { max-width: 100%; height: auto; cursor: zoom-in; }
.diagram pre.mermaid.is-zoomable { position: relative; }
.diagram-zoom[hidden] { display: none; }
.diagram-zoom {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  overflow: auto;
  padding: 4vh 4vw;
  background: rgba(7, 8, 20, 0.82);
  backdrop-filter: blur(3px);
}
.diagram-zoom-panel {
  position: relative;
  flex: 0 0 auto;
  padding: 30px;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}
.diagram-zoom-stage svg { display: block; max-width: none; height: auto; }
.diagram-zoom-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: #fff;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 700;
}
.diagram-zoom-close:hover { border-color: var(--brand); color: var(--brand); }
body.zoom-open { overflow: hidden; }
.diagram-failed pre.mermaid { color: var(--muted); text-align: left; white-space: pre-wrap; }
.diagram-failed pre.mermaid::before {
  content: "Diagram source (renderer unavailable)";
  display: block;
  margin-bottom: 10px;
  color: var(--amber);
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* --------------------------------- badges ---------------------------------- */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px 2px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: #f7f9fd;
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
  vertical-align: 1px;
}
.status-dot { width: 4px; height: 4px; border-radius: 50%; background: currentColor; opacity: 0.75; }
.status-badge.is-implemented { border-color: #b8ddce; background: #effaf5; color: var(--green); }
.status-badge.is-tested { border-color: #b8d8e7; background: #eef8fc; color: #086b8d; }
.status-badge.is-fuji { border-color: #c7d2f7; background: #eef2ff; color: var(--brand); }
.status-badge.is-mock { border-color: #e8d0a9; background: #fff8ec; color: var(--amber); }
.status-badge.is-partial { border-color: #e5d5a7; background: #fffaeb; color: #8e6200; }
.status-badge.is-planned { border-color: #d8dee8; background: #f7f9fc; color: #5e6880; }
.status-badge.is-blocked { border-color: #ecc2c7; background: #fff2f3; color: var(--red); }
.status-badge.is-unsupported { border-color: #d9dfe8; background: #f5f7fa; color: #6f7a90; }
.status-badge.is-verification { border-color: #c7d2f7; background: #eef2ff; color: var(--brand); }
.badge-detail { color: inherit; font-weight: 500; opacity: 0.72; }

/* ----------------------------- home cards & lists --------------------------- */
.home-grid.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 0 0 42px; }
.home-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 195px;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
}
.home-card:hover { border-color: #c3cdf2; box-shadow: 0 12px 34px rgba(24, 0, 173, 0.08); transform: translateY(-2px); color: var(--ink); }
.card-index { color: var(--brand-3); font-family: var(--mono); font-size: 10px; font-weight: 700; }
.home-card h3 { margin: 22px 0 7px; font-size: 18px; font-weight: 800; letter-spacing: -0.025em; }
.home-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.55; }
.card-link { margin-top: auto; padding-top: 18px; color: var(--brand); font-size: 11px; font-weight: 700; }
.home-card::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-top: 1px solid #c3cdf2;
  border-right: 1px solid #c3cdf2;
}
.home-kicker { margin: 0 0 8px; color: var(--brand); font-size: 10.5px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; }
.home-lede { max-width: 680px; margin: 0 0 24px; color: var(--muted); font-size: 16px; }

/* --------------------------------- pager ----------------------------------- */
.page-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 54px; padding-top: 24px; border-top: 1px solid var(--line); }
.pager-card { display: flex; flex-direction: column; gap: 5px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; text-decoration: none; transition: border-color 0.14s ease, background 0.14s ease; }
.pager-card:hover { border-color: #c3cdf2; background: #fbfcff; }
.pager-prev { align-items: flex-start; }
.pager-next { align-items: flex-end; text-align: right; }
.pager-kicker { color: var(--faint); font-size: 10px; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; }
.pager-title { color: var(--ink); font-size: 13.5px; font-weight: 700; }

/* ---------------------------------- toc ------------------------------------ */
.page-toc { position: sticky; top: var(--topbar-h); max-height: calc(100vh - var(--topbar-h)); overflow-y: auto; padding: 48px 0 40px 10px; scrollbar-width: thin; }
.toc-label { margin: 0 0 10px; color: var(--faint); font-size: 10px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.toc-link { display: block; padding: 4px 0 4px 10px; border-left: 1px solid var(--line); color: var(--muted); font-size: 11.5px; line-height: 1.45; text-decoration: none; transition: color 0.14s ease, border-color 0.14s ease; }
.toc-link:hover { color: var(--brand); }
.toc-link.is-active { border-left-color: var(--brand); color: var(--brand); font-weight: 700; }
.toc-depth-3 { padding-left: 20px; font-size: 11px; }

/* --------------------------------- footer ---------------------------------- */
.site-footer { border-top: 1px solid var(--line); background: #fafbfe; margin-top: 20px; }
.footer-inner { max-width: 1500px; margin: 0 auto; padding: 34px 28px 40px; display: grid; grid-template-columns: 180px 1fr auto; gap: 20px 30px; align-items: start; }
.footer-brand { display: flex; align-items: center; gap: 9px; color: var(--ink); font-size: 12px; font-weight: 700; }
.footer-brand .brand-mark { width: 22px; height: 22px; color: var(--brand); }
.footer-inner > p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; justify-content: flex-end; }
.footer-links a { color: var(--muted); font-size: 11.5px; font-weight: 600; text-decoration: none; }
.footer-links a:hover { color: var(--brand); }
.footer-fine { grid-column: 2 / -1; margin: 6px 0 0 !important; color: var(--faint) !important; font-size: 10.5px !important; }

/* --------------------------------- search ---------------------------------- */
.mobile-scrim { display: none; }
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 20px 30px;
  background: rgba(7, 8, 20, 0.48);
  backdrop-filter: blur(7px);
}
.search-overlay[hidden] { display: none; }
.search-dialog {
  width: min(660px, 100%);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 32px 90px rgba(7, 8, 20, 0.35);
  overflow: hidden;
  animation: search-in 0.16s ease both;
}
@keyframes search-in { from { opacity: 0; transform: translateY(-7px) scale(0.99); } to { opacity: 1; transform: none; } }
.search-head { display: flex; align-items: center; gap: 12px; height: 58px; padding: 0 17px; border-bottom: 1px solid var(--line); color: var(--muted); }
.search-head input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 16px; }
.search-head input::placeholder { color: #a7adbb; }
.search-close { border: 0; border-radius: 5px; background: #f4f6fa; color: var(--muted); padding: 4px 7px; font-size: 10px; font-weight: 700; }
.search-results { max-height: min(54vh, 460px); overflow-y: auto; padding: 8px; }
.search-empty { margin: 0; padding: 28px 18px; color: var(--muted); font-size: 13px; text-align: center; }
.search-result { display: block; padding: 11px 12px; border-radius: 8px; text-decoration: none; }
.search-result:hover, .search-result.is-active { background: #f4f7ff; }
.search-result-top { display: flex; align-items: baseline; gap: 8px; }
.search-result-category { color: var(--brand); font-size: 9px; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; }
.search-result-title { color: var(--ink); font-size: 13.5px; font-weight: 700; }
.search-result-excerpt { display: block; margin-top: 3px; color: var(--muted); font-size: 11.5px; line-height: 1.45; }
.search-foot { display: flex; gap: 16px; padding: 9px 16px; border-top: 1px solid var(--line); background: #fafbfe; color: var(--faint); font-size: 9.5px; }
.search-foot span { display: inline-flex; align-items: center; gap: 4px; }
.search-foot kbd { height: 17px; min-width: 17px; font-size: 9px; }
body.search-open { overflow: hidden; }

/* -------------------------------- not found -------------------------------- */
.not-found { min-height: 100vh; display: grid; place-items: center; padding: 30px; background: #f7f9ff; }
.not-found main { max-width: 520px; text-align: center; }
.not-found .brand { justify-content: center; margin-bottom: 34px; }
.not-found h1 { margin: 0 0 10px; font-size: 42px; letter-spacing: -0.05em; }
.not-found p { color: var(--muted); }
.eyebrow { color: var(--brand) !important; font-size: 10px !important; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; }

/* -------------------------------- responsive -------------------------------- */
@media (max-width: 1240px) {
  .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .main { grid-template-columns: minmax(0, 1fr); }
  .page-toc { display: none; }
  .doc { max-width: 860px; padding-right: 30px; }
}
@media (max-width: 1180px) {
  .home-hero { padding: 44px 38px; }
  .home-hero h1 { font-size: clamp(38px, 5.2vw, 54px); }
}
@media (max-width: 920px) {
  :root { --topbar-h: 58px; }
  .topbar-inner { padding: 0 18px; }
  .topbar-context, .topbar-divider { display: none; }
  .menu-toggle { display: flex; }
  .topbar-actions { gap: 13px; }
  .search-trigger { min-width: 38px; width: 38px; padding: 0; justify-content: center; }
  .search-trigger .search-label, .search-trigger kbd { display: none; }
  .topbar-link:first-of-type { display: none; }
  .shell { display: block; padding: 0 18px; }
  .sidebar {
    position: fixed;
    z-index: 90;
    left: 0;
    top: 0;
    width: 286px;
    height: 100vh;
    padding: 24px 18px 30px;
    border-right: 1px solid var(--line);
    background: #fff;
    transform: translateX(-102%);
    transition: transform 0.2s ease;
    box-shadow: 12px 0 40px rgba(10, 8, 35, 0.12);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  .mobile-scrim { position: fixed; inset: 0; z-index: 80; background: rgba(7, 8, 20, 0.35); backdrop-filter: blur(2px); }
  body.nav-open .mobile-scrim { display: block; }
  .doc { max-width: none; padding: 30px 0 68px; }
  .doc-home { padding-top: 18px; }
  .home-hero { padding: 39px 28px; }
  .home-hero h1 { font-size: clamp(38px, 9vw, 53px); }
  .home-grid.cards { grid-template-columns: 1fr; }
  .home-card { min-height: 150px; }
  .footer-inner { grid-template-columns: 1fr; padding: 28px 18px 34px; }
  .footer-links { justify-content: flex-start; }
  .footer-fine { grid-column: 1; }
}
@media (max-width: 620px) {
  body { font-size: 15px; }
  .topbar-inner { padding: 0 14px; gap: 10px; }
  .brand-text span { display: none; }
  .topbar-link { font-size: 11px; }
  .topbar-link span { display: none; }
  .shell { padding: 0 14px; }
  .home-hero { margin: 12px 0 32px; padding: 32px 21px 26px; border-radius: 15px; }
  .home-hero h1 { font-size: 39px; }
  .hero-lede { font-size: 14px; }
  .hero-meta { gap: 7px 12px; font-size: 9px; }
  .page-header { margin-bottom: 27px; padding-bottom: 23px; }
  .page-header h1 { font-size: 36px; }
  .page-description { font-size: 14.5px; }
  .doc-content { font-size: 14.5px; }
  .doc-content h2 { font-size: 23px; margin-top: 38px; }
  .doc-content h3 { font-size: 18px; }
  .heading-anchor { display: none; }
  .doc-content table { display: block; overflow-x: auto; white-space: nowrap; }
  .code-block { margin-left: -4px; margin-right: -4px; }
  .page-pager { grid-template-columns: 1fr; }
  .pager-next { align-items: flex-start; text-align: left; }
  .search-overlay { padding: 7vh 10px 20px; }
  .search-foot { display: none; }
  .search-result-category { display: none; }
}
@media print {
  .topbar, .sidebar, .page-toc, .page-pager, .site-footer, .search-overlay, .heading-anchor { display: none !important; }
  .shell, .main { display: block; padding: 0; }
  .doc { max-width: none; padding: 0; }
  .doc-content a { color: inherit; }
}