/* Neutral surfaces and blue accents style.
   Keep project branding in extra styles, rather than changing the renderer. */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f6f7f9;
  --fg: #1d2330;
  --muted: #4a5263;
  --faint: #7a8294;
  --line: #dde1e7;
  --accent: #2f6fde;
  --accent-soft: #e6eefc;
  --link: #2459c4;
  --code: #f4f5f8;
  --shadow: 0 6px 24px rgba(20,30,50,.12);
  --font: system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono: ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --topbar-h: 56px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #11151c; --surface: #171c25; --fg: #e4e8ef;
    --muted: #b3bac7; --faint: #858d9c; --line: #2a313d;
    --accent: #5b93f0; --accent-soft: #1b2a45;
    --link: #7eaaf5; --code: #181e28;
    --shadow: 0 6px 24px rgba(0,0,0,.45);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #11151c; --surface: #171c25; --fg: #e4e8ef;
  --muted: #b3bac7; --faint: #858d9c; --line: #2a313d;
  --accent: #5b93f0; --accent-soft: #1b2a45;
  --link: #7eaaf5; --code: #181e28;
  --shadow: 0 6px 24px rgba(0,0,0,.45);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.7 var(--font); }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
button,input { font: inherit; color: inherit; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: .35rem .65rem; }
button { cursor: pointer; }
input { width: 200px; min-width: 0; font-size: 14px; }
.skip { position: absolute; left: -999px; top: 0; }
.skip:focus { left: 8px; top: 8px; z-index: 100; background: var(--bg); padding: 4px 8px; }
.topbar {
  position: sticky; top: 0; z-index: 20; min-height: var(--topbar-h);
  display: flex; align-items: center; gap: 12px; padding: 0 16px;
  background: color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.brand { color: var(--fg); font-size: 18px; font-weight: 700; letter-spacing: .02em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.topnav { display: flex; gap: 4px; margin-left: 8px; }
.topnav a { color: var(--muted); padding: 6px 10px; border-radius: 6px; font-size: 15px; white-space: nowrap; }
.topnav a:hover { background: var(--surface); color: var(--fg); text-decoration: none; }
.topnav a[aria-current] { color: var(--accent); font-weight: 600; }
.tools { display: flex; align-items: center; gap: .75rem; margin-left: auto; }
.tools button { font-size: 13px; background: transparent; }
.search-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.layout { display: grid; grid-template-columns: 250px minmax(0,1fr) 210px; gap: 0; width: 100%; max-width: 1440px; margin: auto; min-height: calc(100vh - 140px); }
.sidebar { position: sticky; top: var(--topbar-h); height: calc(100vh - var(--topbar-h)); overflow-y: auto; padding: 20px 12px 40px 16px; border-right: 1px solid var(--line); font-size: 14px; }
.sidebar>details>summary { font-weight: 600; margin: 0 8px 18px; color: var(--muted); cursor: pointer; }
.nav-group { margin-bottom: 20px; }
.nav-group h2,.toc h2 { font-size: 12px; color: var(--faint); text-transform: uppercase; letter-spacing: .06em; margin: 0 8px 6px; }
.nav-group summary { margin: 0 8px 6px; color: var(--faint); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; cursor: pointer; }
.nav-group ul,.toc ul { list-style: none; margin: 0; padding: 0; }
.nav-group a { display: block; padding: 4px 8px; border-radius: 6px; color: var(--muted); line-height: 1.4; }
.nav-group a:hover { background: var(--surface); color: var(--fg); text-decoration: none; }
.nav-group a[aria-current] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.toc { position: sticky; top: var(--topbar-h); height: max-content; padding: 28px 16px; font-size: 13px; }
.toc a { color: var(--muted); }
.toc li { margin: .4rem 0; }
.toc .level-3 { padding-left: .75rem; }
.toc .level-4 { padding-left: 1.5rem; }
main { min-width: 0; padding: 32px 40px 48px; }
article { max-width: 860px; margin: auto; }
article h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -.02em; margin: 0 0 1.25rem; }
article h2 { font-size: 1.5rem; line-height: 1.3; margin: 2.25rem 0 1rem; border-bottom: 1px solid var(--line); padding-bottom: .4rem; }
article h3 { line-height: 1.3; margin-top: 1.8rem; }
article h1,article h2,article h3,article h4 { scroll-margin-top: 80px; }
article p { margin: 1rem 0; }
article li+li { margin-top: .3rem; }
code { background: var(--code); padding: .12rem .3rem; border-radius: 4px; font: .9em/1.7 var(--mono); }
pre { background: var(--code); padding: 14px 16px; border: 1px solid var(--line); border-radius: 8px; overflow: auto; font-size: 14px; }
pre code { padding: 0; background: transparent; }
table { display: block; max-width: 100%; border-collapse: collapse; overflow: auto; margin: 1.5rem 0; font-size: 15px; }
td,th { padding: 6px 10px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--surface); }
th[align="left"],td[align="left"] { text-align: left; }
th[align="center"],td[align="center"] { text-align: center; }
th[align="right"],td[align="right"] { text-align: right; }
blockquote { margin: 1.5rem 0; padding: 2px 16px; border-left: 4px solid var(--line); color: var(--muted); }
img { max-width: 100%; height: auto; }
.page-footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.pager { display: flex; justify-content: space-between; gap: 1rem; }
.site-footer { padding: 20px 16px; text-align: center; color: var(--faint); font-size: 14px; border-top: 1px solid var(--line); }
.layout-home .layout { display: block; max-width: 1080px; }
.layout-home .sidebar,.layout-home .toc { display: none; }
.layout-home main { padding-top: 56px; }
.layout-home article h1 { font-size: clamp(2.2rem,4.6vw,3.4rem); line-height: 1.08; }
.layout-home article>p:first-of-type { font-size: 1.25rem; color: var(--accent); font-weight: 600; }
#search-results { position: fixed; z-index: 30; right: 16px; top: 64px; width: min(520px,calc(100vw - 32px)); max-height: 70vh; overflow: auto; padding: 10px 16px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
#search-results>p { color: var(--faint); font-size: 13px; }
#search-results ul { list-style: none; padding: 0; }
#search-results li { padding: .7rem 0; border-top: 1px solid var(--line); }
#search-results li p { color: var(--muted); font-size: 13px; margin: .2rem 0; line-height: 1.5; }
@media (max-width: 1180px) {
  .layout { grid-template-columns: 230px minmax(0,1fr); }
  .toc,.topnav { display: none; }
}
@media (max-width: 760px) {
  .topbar { padding: 10px 12px; flex-wrap: wrap; gap: 8px; }
  .tools { width: 100%; margin: 0; }
  .tools input { flex: 1; width: 140px; }
  .layout { display: block; }
  .sidebar,.layout-home .sidebar { display: block; position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 16px; }
  .sidebar>details>summary { margin-bottom: 0; }
  .sidebar>details[open]>summary { margin-bottom: 18px; }
  main,.layout-home main { padding: 24px 16px 40px; }
  article h1 { font-size: 1.8rem; }
  .layout-home article h1 { font-size: 2.2rem; }
  #search-results { top: 108px; }
}
@media print {
  .topbar,.sidebar,.toc,.page-footer,.site-footer,#search-results { display: none!important; }
  .layout { display: block; }
  main,.layout-home main { padding: 0; }
  body { background: white; color: black; }
  a { color: inherit; }
  pre { white-space: pre-wrap; }
}

/* Optional standard Markdown features share the active theme palette. */
.callout { border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; background: var(--surface); }
.callout-title { font-weight: 700; color: var(--fg); }
.callout-warning,.callout-caution { border-left-color: #b7791f; }
.anchor { margin-right: .35em; opacity: .5; text-decoration: none; }
.anchor:hover { opacity: 1; }
.nav-group .nav-group { margin: 10px 0 10px 8px; padding-left: 8px; border-left: 1px solid var(--line); }