:root {
  --bg: #0a0c11;
  --bg-raised: #10131a;
  --bg-card: #11141c;
  --bg-code: #0d1016;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.13);
  --text: #eef0f5;
  --muted: #9aa1b2;
  --dim: #687084;
  --accent: #7c83ff;
  --accent-soft: rgba(124, 131, 255, 0.12);
  --mint: #4fd1a5;
  --amber: #f0b45b;
  --red: #f07178;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --top: 60px;
}
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--top) + 16px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16.5px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
::selection { background: var(--accent); color: #fff; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 20;
  height: var(--top); display: flex; align-items: center; gap: 14px;
  padding: 0 20px; border-bottom: 1px solid var(--line);
  background: rgba(10, 12, 17, 0.9);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.logo { font: 700 19px var(--mono); text-decoration: none; letter-spacing: -0.02em; }
.logo b { color: var(--accent); }
.crumb {
  font: 500 13px var(--mono); color: var(--muted); text-decoration: none;
  padding: 3px 9px; border: 1px solid var(--line-strong); border-radius: 999px;
}
.crumb:hover { color: var(--text); border-color: var(--accent); }
.top-links { margin-left: auto; display: flex; gap: 20px; font-size: 14.5px; }
.top-links a { color: var(--muted); text-decoration: none; }
.top-links a:hover { color: var(--text); }
.menu-button {
  display: none; width: 36px; height: 36px; padding: 9px 8px; border: 1px solid var(--line-strong);
  border-radius: 8px; background: none; cursor: pointer; flex-direction: column; justify-content: space-between;
}
.menu-button span { display: block; height: 2px; background: var(--text); border-radius: 2px; }

/* Search */
.search { position: relative; flex: 0 1 420px; margin-left: 18px; }
.search input {
  width: 100%; height: 38px; padding: 0 38px 0 14px;
  font: 14.5px var(--sans); color: var(--text);
  background: var(--bg-card); border: 1px solid var(--line-strong); border-radius: 9px; outline: none;
}
.search input::placeholder { color: var(--dim); }
.search input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search-key {
  position: absolute; right: 10px; top: 9px; font: 12px var(--mono); color: var(--dim);
  border: 1px solid var(--line-strong); border-radius: 5px; padding: 0 6px;
}
.search input:focus + .search-key { display: none; }
.results {
  position: absolute; top: 44px; left: 0; right: 0; margin: 0; padding: 6px; list-style: none;
  max-height: min(70vh, 520px); overflow-y: auto;
  background: var(--bg-raised); border: 1px solid var(--line-strong); border-radius: 12px;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.8);
}
.results li a {
  display: block; padding: 9px 12px; border-radius: 8px; text-decoration: none;
}
.results li[aria-selected="true"] a, .results li a:hover { background: var(--accent-soft); }
.results .r-title { display: block; font-weight: 600; font-size: 15px; }
.results .r-where { font: 12px var(--mono); color: var(--accent); }
.results .r-snippet { display: block; font-size: 13.5px; color: var(--muted); line-height: 1.5; margin-top: 2px; }
.results mark { background: none; color: var(--mint); font-weight: 600; }
.results .r-empty { padding: 10px 12px; color: var(--muted); font-size: 14px; }

/* Layout */
.shell {
  display: grid; grid-template-columns: 260px minmax(0, 1fr) 220px;
  max-width: 1320px; margin: 0 auto;
}
.sidebar {
  position: sticky; top: var(--top); align-self: start;
  height: calc(100vh - var(--top)); overflow-y: auto;
  padding: 26px 18px 40px 22px; border-right: 1px solid var(--line);
}
.nav-section + .nav-section { margin-top: 22px; }
.nav-title {
  margin: 0 0 8px; font: 600 11.5px var(--mono); letter-spacing: .1em;
  text-transform: uppercase; color: var(--dim);
}
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li a {
  display: block; padding: 5px 10px; margin-left: -10px; border-radius: 7px;
  font-size: 14.5px; color: var(--muted); text-decoration: none; line-height: 1.45;
}
.sidebar li a:hover { color: var(--text); background: rgba(255, 255, 255, 0.03); }
.sidebar li a[aria-current="page"] { color: var(--text); background: var(--accent-soft); box-shadow: inset 2px 0 0 var(--accent); }

.content { min-width: 0; padding: 40px 48px 60px; }
.toc {
  position: sticky; top: var(--top); align-self: start;
  max-height: calc(100vh - var(--top)); overflow-y: auto; padding: 40px 20px 40px 8px;
}
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li a {
  display: block; padding: 3px 0 3px 10px; border-left: 1px solid var(--line);
  font-size: 13.5px; color: var(--dim); text-decoration: none; line-height: 1.45;
}
.toc li.sub a { padding-left: 22px; }
.toc li a:hover { color: var(--text); }
.toc li a.active { color: var(--text); border-left-color: var(--accent); }

/* Prose */
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(30px, 4vw, 40px); line-height: 1.15; letter-spacing: -0.03em; margin: 0 0 10px; }
.prose .lede { font-size: 18.5px; color: var(--muted); margin: 0 0 28px; }
.prose h2 {
  font-size: 24px; letter-spacing: -0.02em; line-height: 1.25;
  margin: 44px 0 12px; padding-top: 10px; border-top: 1px solid var(--line);
}
.prose h3 { font-size: 18.5px; margin: 30px 0 8px; }
.prose h2 a.anchor, .prose h3 a.anchor {
  margin-left: 8px; color: var(--dim); text-decoration: none; opacity: 0; font-weight: 400;
}
.prose h2:hover a.anchor, .prose h3:hover a.anchor { opacity: 1; }
.prose p, .prose ul, .prose ol { margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose li > p { margin: 0 0 8px; }
.prose a { color: var(--accent); text-decoration: none; }
.prose a:hover { text-decoration: underline; }
.prose strong { color: #fff; }
.prose code {
  font: 0.86em var(--mono); background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px; border-radius: 5px; white-space: nowrap;
}
.prose table {
  width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 14.5px;
  display: block; overflow-x: auto;
}
.prose th, .prose td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-weight: 600; color: var(--muted); border-bottom-color: var(--line-strong); white-space: nowrap; }
.prose td code { white-space: nowrap; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }

/* Code blocks */
.prose div.highlighter-rouge, .prose pre {
  position: relative; margin: 0 0 18px;
}
.prose pre {
  margin: 0; padding: 16px 18px; overflow-x: auto;
  background: var(--bg-code); border: 1px solid var(--line-strong); border-radius: 11px;
  font: 13.8px/1.65 var(--mono);
}
.prose pre code { background: none; padding: 0; font: inherit; white-space: pre; color: #dfe2ea; }
.copy {
  position: absolute; top: 8px; right: 8px; padding: 4px 9px;
  font: 600 11.5px var(--mono); color: var(--muted);
  background: var(--bg-card); border: 1px solid var(--line-strong); border-radius: 6px;
  cursor: pointer; opacity: 0; transition: opacity .15s;
}
.prose div.highlighter-rouge:hover .copy, .copy:focus { opacity: 1; }
.copy:hover { color: var(--text); border-color: var(--accent); }
/* Rouge tokens */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs { color: #6f7890; font-style: italic; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sh, .highlight .se, .highlight .sb { color: #8fd6b2; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kc, .highlight .nb { color: #a9aeff; }
.highlight .nv, .highlight .vg, .highlight .nx { color: #f0b45b; }
.highlight .m, .highlight .mi, .highlight .mf { color: #f5a38a; }
.highlight .o, .highlight .p { color: #b7bdcc; }
.highlight .nt, .highlight .na { color: #8fcfff; }

/* Callouts: a blockquote followed by {: .tip}, {: .note}, or {: .warning} */
.prose blockquote {
  margin: 0 0 18px; padding: 12px 16px 12px 44px; position: relative;
  border: 1px solid var(--line-strong); border-radius: 11px; background: var(--bg-card); color: var(--text);
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose blockquote::before {
  content: "i"; position: absolute; left: 14px; top: 13px;
  width: 20px; height: 20px; border-radius: 6px; display: grid; place-items: center;
  font: 700 12px var(--mono); color: var(--accent); background: var(--accent-soft);
}
.prose blockquote.tip { border-color: rgba(79, 209, 165, 0.35); }
.prose blockquote.tip::before { content: "✓"; color: var(--mint); background: rgba(79, 209, 165, 0.12); }
.prose blockquote.warning { border-color: rgba(240, 180, 91, 0.4); }
.prose blockquote.warning::before { content: "!"; color: var(--amber); background: rgba(240, 180, 91, 0.12); }

/* Cards for overview pages */
.prose .cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 0 0 24px; }
.prose .cards a {
  display: block; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-card);
  color: var(--text); text-decoration: none; transition: border-color .15s;
}
.prose .cards a:hover { border-color: rgba(124, 131, 255, 0.5); text-decoration: none; }
.prose .cards strong { display: block; margin-bottom: 4px; }
.prose .cards span { display: block; font-size: 14px; color: var(--muted); line-height: 1.5; }

/* Pager and footer */
.pager { display: flex; justify-content: space-between; gap: 12px; max-width: 760px; margin-top: 48px; }
.pager a {
  flex: 1 1 0; max-width: 50%; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px;
  text-decoration: none; font-weight: 600;
}
.pager a:hover { border-color: var(--accent); }
.pager small { display: block; font: 12px var(--mono); color: var(--dim); font-weight: 400; }
.pager .next { text-align: right; margin-left: auto; }
.foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; max-width: 760px;
  margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--dim);
}
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--text); }

/* Narrow screens */
@media (max-width: 1180px) {
  .shell { grid-template-columns: 250px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .menu-button { display: flex; }
  .crumb, .top-links { display: none; }
  .search { margin-left: auto; flex: 1 1 auto; }
  .search-key { display: none; }
  .top { padding: 0 16px; gap: 10px; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; width: min(300px, 85vw); height: auto;
    padding-top: calc(var(--top) + 20px);
    background: var(--bg); z-index: 15; transform: translateX(-100%); transition: transform .2s;
    border-right: 1px solid var(--line-strong);
  }
  body.nav-open .sidebar { transform: none; }
  .content { padding: 28px 16px 48px; }
  .prose pre { font-size: 12.8px; }
}
@media (max-width: 520px) {
  .logo { font-size: 17px; }
  .pager { flex-direction: column; }
  .pager a { max-width: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}