:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f8;
  --bg-code: #f5f5f6;
  --fg: #141416;
  --fg-2: #4f4f57;
  --fg-3: #74747c;
  --line: #e7e7ea;
  --line-2: #d6d6db;
  --accent: #141416;
  --accent-soft: #efeff1;
  --ok: #157f3c;
  --ok-soft: #e7f6ec;
  --warn: #8a5300;
  --warn-soft: #fdf3e1;
  --danger: #c4222c;
  --danger-soft: #fdecee;
  --danger-line: #f3c2c6;
  --t-k: #9b1c33;
  --t-s: #1c7a4a;
  --t-n: #9a4f00;
  --radius: 10px;
  --radius-sm: 6px;
  --top-h: 60px;
  --side-w: 280px;
  --toc-w: 220px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --shadow: 0 1px 2px rgba(16,16,20,.04), 0 8px 24px rgba(16,16,20,.06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0f11; --bg-soft: #17171a; --bg-code: #16161a;
    --fg: #ececef; --fg-2: #b3b3bb; --fg-3: #8a8a93; --line: #26262c; --line-2: #34343b;
    --accent: #ececef; --accent-soft: #222227;
    --ok: #5fcb87; --ok-soft: #142b1c; --warn: #e9b25a; --warn-soft: #33260e;
    --danger: #ff6b74; --danger-soft: #2e1417; --danger-line: #5a2329;
    --t-k: #f3818a; --t-s: #8fd3a6; --t-n: #f0b46b;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f0f11; --bg-soft: #17171a; --bg-code: #16161a;
  --fg: #ececef; --fg-2: #b3b3bb; --fg-3: #8a8a93; --line: #26262c; --line-2: #34343b;
  --accent: #ececef; --accent-soft: #222227;
  --ok: #5fcb87; --ok-soft: #142b1c; --warn: #e9b25a; --warn-soft: #33260e;
  --danger: #ff6b74; --danger-soft: #2e1417; --danger-line: #5a2329;
  --t-k: #f3818a; --t-s: #8fd3a6; --t-n: #f0b46b;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--top-h) + 16px); }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.65 var(--font); }
a { color: var(--fg); text-decoration: underline; text-decoration-color: var(--line-2); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--fg); }
code, kbd, pre { font-family: var(--mono); }
code { font-size: .86em; background: var(--bg-code); border: 1px solid var(--line); border-radius: 5px; padding: .08em .35em; }
button { font: inherit; color: inherit; }
svg.i { width: 18px; height: 18px; flex: none; }

.top { position: sticky; top: 0; z-index: 40; height: var(--top-h); display: flex; align-items: center; gap: 14px;
  padding: 0 20px; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 650; letter-spacing: -.01em; white-space: nowrap; text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line); background: #111; }
.brand .b2 { color: var(--fg-3); font-weight: 500; }
.topnav { display: flex; gap: 2px; margin-left: 14px; }
.topnav a { color: var(--fg-2); padding: 6px 10px; border-radius: var(--radius-sm); font-size: 14px; text-decoration: none; }
.topnav a:hover, .topnav a.cur { background: var(--bg-soft); color: var(--fg); }
.top-r { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.ib { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: var(--radius-sm);
  border: 1px solid transparent; background: none; cursor: pointer; color: var(--fg-2); }
.ib:hover { background: var(--bg-soft); color: var(--fg); }
.search-btn { display: flex; align-items: center; gap: 8px; height: 36px; padding: 0 10px 0 12px; border: 1px solid var(--line);
  border-radius: var(--radius-sm); background: var(--bg-soft); color: var(--fg-3); cursor: pointer; font-size: 14px; min-width: 200px; }
.search-btn:hover { border-color: var(--line-2); }
.search-btn kbd { margin-left: auto; font-size: 11px; border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; background: var(--bg); }
.burger, .side-close { display: none; }
.theme-dark { display: none; }
:root[data-theme="dark"] .theme-dark { display: block; } :root[data-theme="dark"] .theme-light { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme-dark { display: block; } :root:not([data-theme="light"]) .theme-light { display: none; } }

.layout { display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr) var(--toc-w); max-width: 1440px; margin: 0 auto; }
.side { position: sticky; top: var(--top-h); height: calc(100vh - var(--top-h)); overflow-y: auto; border-right: 1px solid var(--line);
  padding: 16px 12px 40px; scrollbar-width: thin; }
.side-search { display: flex; gap: 6px; margin-bottom: 10px; }
.sbox { flex: 1; display: flex; align-items: center; gap: 8px; height: 36px; padding: 0 10px; border: 1px solid var(--line);
  border-radius: var(--radius-sm); background: var(--bg-soft); color: var(--fg-3); }
.sbox:focus-within { border-color: var(--fg-3); }
.sbox input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--fg); font: inherit; font-size: 14px; }
.sbox kbd { font-size: 11px; border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; background: var(--bg); }
.results { display: flex; flex-direction: column; gap: 2px; margin-bottom: 12px; }
.results a { display: flex; flex-direction: column; padding: 7px 10px; border-radius: var(--radius-sm); text-decoration: none; color: var(--fg); font-size: 14px; }
.results a:hover, .results a.sel { background: var(--bg-soft); }
.results small { color: var(--fg-3); font-size: 12px; }
.results .none { color: var(--fg-3); padding: 8px 10px; font-size: 14px; }
.ng { margin: 2px 0; }
.ng > summary { list-style: none; display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 13px; font-weight: 600; color: var(--fg-2); user-select: none; }
.ng > summary::-webkit-details-marker { display: none; }
.ng > summary:hover { background: var(--bg-soft); }
.ng > summary .chev { margin-left: auto; width: 14px; height: 14px; transition: transform .15s; color: var(--fg-3); }
.ng[open] > summary .chev { transform: rotate(90deg); }
.ng ul { list-style: none; margin: 2px 0 8px; padding: 0 0 0 10px; border-left: 1px solid var(--line); margin-left: 16px; }
.ng li a { display: flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: var(--radius-sm); font-size: 13.5px;
  color: var(--fg-2); text-decoration: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ng li a:hover { background: var(--bg-soft); color: var(--fg); }
.ng li a.cur { background: var(--accent-soft); color: var(--fg); font-weight: 600; }
.ng li a .dot { width: 6px; height: 6px; border-radius: 50%; flex: none; background: var(--line-2); }
.ng li a .dot.st-supported { background: var(--ok); } .ng li a .dot.st-partial { background: var(--warn); }
.nav-h { display: flex; align-items: center; justify-content: space-between; margin: 16px 10px 6px; font-size: 11px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: var(--fg-3); }
.nav-h a { font-weight: 500; letter-spacing: 0; text-transform: none; font-size: 12px; color: var(--fg-3); }

.main { min-width: 0; padding: 28px 48px 60px; }
.doc { max-width: 820px; }
.doc h1 { font-size: 34px; line-height: 1.2; letter-spacing: -.02em; margin: 6px 0 14px; }
.doc h1 code { font-size: .9em; border: 0; background: none; padding: 0; }
.doc h2 { font-size: 22px; letter-spacing: -.01em; margin: 40px 0 12px; padding-top: 8px; }
.doc h3 { font-size: 17px; margin: 28px 0 8px; }
.doc h2 a, .doc h3 a { color: inherit; text-decoration: none; }
.doc h2 a:hover::after, .doc h3 a:hover::after { content: " #"; color: var(--fg-3); }
.doc p, .doc li { color: var(--fg-2); }
.doc strong, .doc b { color: var(--fg); }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 4px 0; }
.lead { font-size: 17px; color: var(--fg-2); margin: 0 0 20px; }
.crumbs { font-size: 13px; color: var(--fg-3); margin-bottom: 4px; }
.crumbs a { color: var(--fg-3); }

.alpha { display: flex; gap: 12px; align-items: flex-start; border: 1px solid var(--danger-line); background: var(--danger-soft);
  color: var(--danger); border-radius: var(--radius); padding: 12px 14px; margin: 0 0 22px; font-size: 14px; line-height: 1.5; }
.alpha svg { width: 20px; height: 20px; flex: none; margin-top: 1px; }
.alpha b { color: var(--danger); display: block; margin-bottom: 2px; }
.alpha span { color: var(--danger); opacity: .9; }

.hero { padding: 6px 0 4px; }
.hero-logo { width: 72px; height: 72px; border-radius: 50%; border: 1px solid var(--line); background: #111; display: block; margin-bottom: 14px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 22px 0 6px; }
.stat { display: flex; flex-direction: column; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--fg); background: var(--bg); transition: border-color .15s; }
.stat:hover { border-color: var(--line-2); }
.stat b { font-size: 26px; letter-spacing: -.02em; line-height: 1.2; }
.stat span { font-size: 13px; color: var(--fg-3); }

.callout { display: flex; gap: 12px; border: 1px solid var(--line); border-left: 3px solid var(--fg-3); background: var(--bg-soft);
  border-radius: var(--radius-sm); padding: 12px 14px; margin: 18px 0; }
.callout p { margin: 4px 0 0; }
.callout-t { font-weight: 650; color: var(--fg); font-size: 14px; }
.callout.warn { border-left-color: var(--warn); background: var(--warn-soft); }
.callout.danger { border-left-color: var(--danger); background: var(--danger-soft); }
.callout.danger .callout-t { color: var(--danger); }
.callout.ok { border-left-color: var(--ok); background: var(--ok-soft); }

.code { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-code); margin: 14px 0; overflow: hidden; }
.code-h { display: flex; align-items: center; justify-content: space-between; padding: 6px 8px 6px 14px; border-bottom: 1px solid var(--line);
  font-size: 12px; color: var(--fg-3); font-weight: 600; }
.copy { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--bg); border-radius: 5px;
  padding: 3px 8px; font-size: 12px; cursor: pointer; color: var(--fg-2); }
.copy:hover { color: var(--fg); border-color: var(--line-2); }
.copy svg { width: 13px; height: 13px; }
.code pre { margin: 0; padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.6; }
.code pre code { background: none; border: 0; padding: 0; font-size: inherit; }
.t-k { color: var(--t-k); } .t-s { color: var(--t-s); } .t-n { color: var(--t-n); } .t-c { color: var(--fg-3); }

.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li { counter-increment: s; position: relative; padding: 2px 0 2px 38px; margin: 10px 0; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 1px; width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid var(--line-2); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 650; color: var(--fg); }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 14px 0; }
.card { display: flex; flex-direction: column; gap: 2px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--fg); transition: border-color .15s, box-shadow .15s; }
.card:hover { border-color: var(--line-2); box-shadow: var(--shadow); }
.card span { font-size: 13.5px; color: var(--fg-3); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); margin: 14px 0; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; font-weight: 600; font-size: 12.5px; color: var(--fg-3); background: var(--bg-soft); padding: 9px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table td { padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--fg-2); }
.table tr:last-child td { border-bottom: 0; }
.table td:first-child { white-space: nowrap; }
.table.list td:nth-child(2) { white-space: nowrap; }

.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--fg-3); background: var(--bg-soft); vertical-align: middle; white-space: nowrap; font-family: var(--font); }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.st-supported { color: var(--ok); background: var(--ok-soft); border-color: transparent; }
.badge.st-partial { color: var(--warn); background: var(--warn-soft); border-color: transparent; }
.badge.st-none { color: var(--fg-3); }
.badge.ext { color: var(--fg); background: var(--accent-soft); border-color: transparent; }
.badge.sm { font-size: 11px; padding: 2px 8px; }
.ent-h h1 { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.ent-h .badge { font-size: 13px; }

.filters { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 20px; }
.filters button { border: 1px solid var(--line); background: var(--bg); border-radius: 999px; padding: 5px 12px; cursor: pointer; font-size: 13px; color: var(--fg-2); }
.filters button b { color: var(--fg-3); font-weight: 600; margin-left: 4px; }
.filters button.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.filters button.on b { color: var(--bg); opacity: .7; }
.fsec h2 .count { font-size: 13px; font-weight: 500; color: var(--fg-3); margin-left: 6px; }

.pn { display: flex; justify-content: space-between; gap: 10px; max-width: 820px; margin-top: 48px; }
.pn a { flex: 1; max-width: 50%; display: flex; flex-direction: column; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--fg); font-weight: 600; }
.pn a:hover { border-color: var(--line-2); }
.pn a.next { text-align: right; margin-left: auto; }
.pn small { font-weight: 500; color: var(--fg-3); font-size: 12px; }
.foot { max-width: 820px; margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; color: var(--fg-3); }
.foot p { margin: 4px 0; color: var(--fg-3); }

.toc { position: sticky; top: var(--top-h); height: calc(100vh - var(--top-h)); overflow-y: auto; padding: 32px 16px; }
.toc-h { font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--fg-3); margin-bottom: 8px; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc li a { display: block; padding: 3px 0 3px 12px; margin-left: -1px; border-left: 1px solid transparent; font-size: 13px; color: var(--fg-3); text-decoration: none; }
.toc li a:hover { color: var(--fg); }
.toc li a.on { color: var(--fg); border-left-color: var(--fg); }
.toc li.l3 a { padding-left: 24px; }

.scrim { display: none; }
@media (max-width: 1180px) { .layout { grid-template-columns: var(--side-w) minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .burger { display: inline-flex; }
  .topnav, .search-btn span, .search-btn kbd { display: none; }
  .search-btn { min-width: 0; width: 36px; padding: 0; justify-content: center; }
  .side { position: fixed; top: 0; left: 0; z-index: 60; width: min(320px, 88vw); height: 100vh; background: var(--bg);
    transform: translateX(-102%); transition: transform .2s; box-shadow: var(--shadow); }
  body.nav-open .side { transform: none; }
  body.nav-open .scrim { display: block; position: fixed; inset: 0; z-index: 50; background: rgba(0,0,0,.35); }
  .side-close { display: inline-flex; }
  .main { padding: 20px 16px 48px; }
  .doc h1 { font-size: 27px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .brand .b2 { display: none; }
}