:root{--fg:#1a2230;--muted:#5b6675;--bg:#f7f8fa;--card:#fff;--line:#e2e6ec;--accent:#0a5;--blue:#1763c7}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg)}
header.site,footer.site{padding:14px 22px;background:var(--card);border-bottom:1px solid var(--line)}
footer.site{border-top:1px solid var(--line);border-bottom:0;color:var(--muted);font-size:14px;margin-top:48px}
header.site{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.home{color:var(--blue);text-decoration:none;font-weight:600}
.badges{display:flex;gap:8px;flex-wrap:wrap}
.badge{font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:#eef1f5;color:var(--muted);border:1px solid var(--line);cursor:help}
.badge.ok{background:#e7f7ef;color:#0a6b46;border-color:#bce8d3}
main{max-width:960px;margin:0 auto;padding:28px 22px}
.page-title{font-size:30px;margin:.2em 0 .1em}
.subtitle{color:var(--muted);margin:.2em 0 1.2em;font-size:17px}
.provenance{background:#eef4fc;border-left:4px solid var(--blue);padding:10px 14px;border-radius:0 6px 6px 0;font-size:14px}
.limits{background:#fff8ec;border:1px solid #f1ddb3;border-radius:8px;padding:10px 14px;margin:14px 0 24px;font-size:14px}
.limits summary{cursor:pointer;font-weight:600;color:#8a5a00}
.content h2{margin-top:1.6em;border-bottom:1px solid var(--line);padding-bottom:.2em}
.content h3{margin-top:1.4em}
.content h1,.content h2,.content h3,.content h4,.content h5,.content h6{scroll-margin-top:16px;position:relative}
.content .anchor{position:absolute;left:-.85em;opacity:0;color:var(--muted);text-decoration:none;font-weight:400;padding-right:.15em;transition:opacity .12s}
.content h1:hover .anchor,.content h2:hover .anchor,.content h3:hover .anchor,.content h4:hover .anchor,.content h5:hover .anchor,.content h6:hover .anchor,.content .anchor:focus{opacity:.6}
:target{background:#fff6d8;border-radius:4px}
nav.toc{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:0 0 26px}
nav.toc strong{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:8px}
nav.toc ol{margin:0;padding-left:1.2em;columns:2;column-gap:32px;font-size:14px}
nav.toc li{margin:.2em 0;break-inside:avoid}
@media(max-width:620px){nav.toc ol{columns:1}.content .anchor{left:-.7em}}
blockquote{margin:1em 0;padding:.6em 1em;background:#f0f3f7;border-left:4px solid var(--muted);border-radius:0 6px 6px 0;color:#374050}
.table-wrap{overflow-x:auto;margin:1em 0}
table{border-collapse:collapse;width:100%;font-size:14px;background:var(--card)}
th,td{border:1px solid var(--line);padding:6px 10px;text-align:left}
th{background:#f0f3f7;font-weight:600}
td:not(:first-child){font-variant-numeric:tabular-nums}
pre.ascii{background:#0f1722;color:#cfe3ff;padding:14px;border-radius:8px;overflow-x:auto;font-size:13px;line-height:1.35}
code{background:#eef1f5;padding:1px 5px;border-radius:4px;font-size:.92em}
a{color:var(--blue)}
hr{border:0;border-top:1px solid var(--line);margin:1.6em 0}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:24px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;text-decoration:none;color:inherit;transition:.15s;display:block}
.card:hover{border-color:var(--blue);box-shadow:0 4px 16px rgba(23,99,199,.1);transform:translateY(-2px)}
.card h3{margin:.1em 0 .4em;color:var(--blue)}
.card p{color:var(--muted);font-size:14px;margin:0}
.viz-frame{width:100%;height:640px;border:1px solid var(--line);border-radius:10px;margin:1em 0;background:var(--card)}
.viz-links{font-size:14px;margin:.4em 0 1.4em}