:root{
  --bg:#fbfcfd;--fg:#1c2733;--muted:#566574;--brand:#0f6b6e;--brand-soft:#e6f2f2;
  --line:#d9e2ea;--card:#ffffff;--link:#0b5c8f;--warn-bg:#fff7e6;--warn-line:#f0c36d;
  --radius:12px;--max:760px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e151b;--fg:#e6edf3;--muted:#9db0c1;--brand:#52c5c9;--brand-soft:#12262c;
    --line:#26343f;--card:#142029;--link:#82c7ff;--warn-bg:#2a2210;--warn-line:#7a5f1c}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);
  font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--link);text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:8px 14px;z-index:10}
.skip:focus{left:8px;top:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
header.site{border-bottom:1px solid var(--line);background:var(--card)}
header.site .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;justify-content:space-between;padding-top:14px;padding-bottom:14px}
.brand{font-weight:700;font-size:1.25rem;color:var(--brand);text-decoration:none;letter-spacing:.2px}
.brand small{display:block;font-weight:400;font-size:.72rem;color:var(--muted);letter-spacing:0}
nav.main a{margin-left:18px;color:var(--fg);text-decoration:none;font-size:.95rem}
nav.main a:hover,nav.main a[aria-current="page"]{color:var(--brand);text-decoration:underline}
main{padding:28px 0 48px}
h1{font-size:clamp(1.65rem,4.5vw,2.2rem);line-height:1.2;margin:.2em 0 .4em}
h2{font-size:1.35rem;line-height:1.3;margin:2em 0 .5em;padding-top:.2em}
h3{font-size:1.1rem;margin:1.5em 0 .4em}
p,ul,ol{margin:0 0 1em}
li{margin:.25em 0}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:6px}
.crumbs a{color:var(--muted)}
.lede{font-size:1.12rem;color:var(--muted)}
.meta{font-size:.85rem;color:var(--muted);margin-bottom:1.4em}
.note,.warn{border-radius:var(--radius);padding:14px 18px;margin:1.4em 0;border:1px solid var(--line)}
.note{background:var(--brand-soft);border-color:transparent}
.warn{background:var(--warn-bg);border-color:var(--warn-line)}
.note p:last-child,.warn p:last-child{margin-bottom:0}
table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.95rem;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--brand-soft)}
caption{caption-side:bottom;text-align:left;font-size:.82rem;color:var(--muted);padding-top:6px}
code,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));margin:1.2em 0}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;text-decoration:none;color:var(--fg)}
.card:hover{border-color:var(--brand)}
.card strong{display:block;color:var(--brand);margin-bottom:4px}
.card span{font-size:.92rem;color:var(--muted)}
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:1.4em 0}
.tool label{display:block;font-weight:600;font-size:.92rem;margin:.6em 0 .25em}
.tool textarea,.tool input{width:100%;font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg)}
.tool textarea{min-height:130px;resize:vertical}
.row{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.tool button{margin-top:12px;font:inherit;font-weight:600;padding:9px 18px;border:0;border-radius:8px;background:var(--brand);color:#fff;cursor:pointer}
.out{margin-top:12px;font-variant-numeric:tabular-nums}
.refs{font-size:.88rem;color:var(--muted)}
.refs li{margin:.5em 0}
.related{margin-top:2.4em;padding-top:1em;border-top:1px solid var(--line)}
footer.site{border-top:1px solid var(--line);padding:22px 0 34px;font-size:.88rem;color:var(--muted);background:var(--card)}
footer.site a{color:var(--muted)}
footer.site .links a{margin-right:16px}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
@media (max-width:520px){nav.main a{margin:0 14px 0 0}body{font-size:16.5px}}