:root{--bg:#f5f7fc;--surface:#fff;--ink:#141a2b;--muted:#5a627a;--line:#e3e8f3;--brand:#5b4bd6;--brand2:#0891b2;--soft:#eef1fb;--box:#f3f6fd;--link:#3457d5;--ok:#0891b2;--okbg:#e6f6fa;--hold:#9a6518;--holdbg:#fdf3e2;--plan:#737b93;--planbg:#f0f2f8;--maxw:1160px}
@media(prefers-color-scheme:dark){:root{--bg:#0f1320;--surface:#151a2b;--ink:#e9edf7;--muted:#9ba3bc;--line:#242c44;--brand:#7c6cff;--brand2:#22d3ee;--soft:#171d33;--box:#141a2c;--link:#8ab4ff;--okbg:#0c2a30;--hold:#e6b45a;--holdbg:#2a2412;--planbg:#1a2036}}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-size:16px;line-height:1.65;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background-color:var(--bg);background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:26px 26px}a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
.shadowbar{background:linear-gradient(90deg,var(--brand),var(--brand2));color:#fff;text-align:center;font-size:12px;padding:5px}.top{position:sticky;top:0;z-index:9;background:var(--surface);border-bottom:1px solid var(--line)}.row{max-width:var(--maxw);margin:0 auto;display:flex;gap:18px;align-items:center;padding:11px 22px}.logo{display:flex;align-items:center;gap:10px}.word{font-weight:800;font-size:20px;color:var(--ink)}.node{width:28px;height:28px;position:relative}.node b{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--brand)}.node .n1{left:0;top:3px}.node .n2{right:0;top:0;background:var(--brand2)}.node .n3{left:8px;bottom:0}.node:before,.node:after{content:"";position:absolute;left:3px;top:6px;height:2px;background:var(--muted);transform-origin:left}.node:before{width:16px;transform:rotate(28deg)}.node:after{left:5px;top:7px;width:12px;transform:rotate(-52deg)}
.search{position:relative;flex:1;max-width:420px;display:flex;gap:8px;align-items:center;background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:8px 12px;color:var(--muted)}.search input{border:0;background:transparent;outline:0;color:var(--ink);width:100%;font-size:14px}.search-results{display:none;position:absolute;left:0;right:0;top:45px;max-height:330px;overflow:auto;background:var(--surface);border:1px solid var(--line);box-shadow:0 18px 36px -24px #000;padding:6px;z-index:20}.search-results.open{display:block}.search-result{display:flex;justify-content:space-between;gap:10px;padding:8px;border-bottom:1px solid var(--line);font-size:13px}.search-result:last-child{border-bottom:0}.search-result small{color:var(--muted)}.nav{display:flex;gap:16px;font-size:14px}.nav a{color:var(--muted)}.lang{font-size:13px;color:var(--muted);border:1px solid var(--line);border-radius:8px;padding:4px 9px}
.hero{max-width:var(--maxw);margin:auto;padding:50px 22px 28px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}.hero.simple{display:block;padding-bottom:8px}.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--brand2);font-weight:800}.big{font-size:46px;line-height:1.1;margin:10px 0 16px;background:linear-gradient(90deg,var(--ink),var(--brand));background-clip:text;color:transparent}.sub{font-size:18px;color:var(--muted);max-width:38em}.stats{display:flex;gap:26px;margin-top:22px;flex-wrap:wrap}.stats b{display:block;font-size:22px}.stats span{font-size:12px;color:var(--muted)}.viz svg{width:100%;display:block}.band,.browse-wrap{max-width:var(--maxw);margin:auto;padding:30px 22px}.band h2,.section-label{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 16px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px 18px;display:block}.card:hover,.tile:hover{border-color:var(--brand);text-decoration:none}.card .tag{font-size:11px;text-transform:uppercase;color:var(--brand2);font-weight:800}.card h3{margin:6px 0;color:var(--ink)}.card p{margin:0;color:var(--muted);font-size:14px}.ready-mark{font-size:10px;color:var(--brand2);text-transform:uppercase}.chips{display:flex;flex-wrap:wrap;gap:10px}.chip{background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:8px 15px;color:var(--ink);font-weight:600}.chip small{color:var(--muted);margin-left:6px}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:16px}.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:5px}.group{margin-top:30px}.group-head{display:flex;align-items:center;gap:12px;border-bottom:2px solid var(--brand);padding-bottom:7px}.group-head h2{margin:0;font-size:19px}.count{background:var(--soft);border:1px solid var(--line);border-radius:999px;font-size:12px;padding:2px 9px}.group-desc{color:var(--muted);font-size:13px}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:10px}.tile{display:flex;align-items:center;justify-content:space-between;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:11px 14px}.tile-name{font-weight:600;color:var(--ink);font-size:14px}.status{font-size:10px;font-weight:800;text-transform:uppercase;padding:3px 7px;border-radius:6px}.status.live-ready{color:var(--ok);background:var(--okbg)}.status.review{color:var(--hold);background:var(--holdbg)}.status.planned{color:var(--plan);background:var(--planbg)}
.concept-wrap{max-width:var(--maxw);margin:auto;display:grid;grid-template-columns:190px minmax(0,1fr) 244px;gap:32px;padding:28px 22px 70px}.toc,.side{position:sticky;top:74px;align-self:start}.toc h2,.side h2{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:var(--muted)}.toc a{display:block;color:var(--muted);padding:5px 0 5px 12px;border-left:2px solid var(--line)}.toc a:hover{border-left-color:var(--brand2);color:var(--brand2)}article{min-width:0}.crumb,.subtitle{font-size:13px;color:var(--muted)}.title{font-size:38px;line-height:1.15;margin:4px 0;background:linear-gradient(90deg,var(--ink),var(--brand));background-clip:text;color:transparent}.lead{font-size:18px}.content-section h2{font-size:20px;margin:32px 0 10px;padding-left:12px;border-left:3px solid var(--brand)}.defbox,.example{border:1px solid var(--line);border-radius:8px;padding:15px 18px;margin:16px 0;background:var(--box)}.defbox{border-color:var(--brand);background:linear-gradient(180deg,var(--soft),transparent)}.box-label{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--brand2);font-weight:800}.math{display:block;overflow:auto;padding:8px 4px;color:var(--ink);font-family:"Cambria Math","Times New Roman",serif}.side-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin-bottom:14px}.side-card dl{margin:0}.side-card dt{font-size:12px;color:var(--muted);margin-top:8px}.side-card dd{margin:1px 0}.related a{display:block;padding:7px 0;border-top:1px solid var(--line)}.related a:first-of-type{border-top:0}.planned-message{background:var(--box);border:1px solid var(--line);padding:20px;border-radius:8px;margin-top:24px}.reference-list{font-size:13px;color:var(--muted)}
footer{border-top:1px solid var(--line);background:var(--surface)}.foot{max-width:var(--maxw);margin:auto;padding:24px 22px;font-size:13px;color:var(--muted)}.license-badge{display:inline-block;border:1px solid var(--line);border-radius:6px;padding:2px 7px;font-weight:700;color:var(--brand);font-size:12px}
@media(max-width:900px){.hero{grid-template-columns:1fr}.viz{display:none}.card-grid{grid-template-columns:1fr}.concept-wrap{grid-template-columns:1fr}.toc,.side{position:static}.toc{display:none}.nav{display:none}.row{gap:10px}.lang{display:none}}

/* Shared shadow presentation polish. */
:focus-visible{outline:3px solid color-mix(in srgb,var(--brand2) 68%,transparent);outline-offset:3px}
.card-grid{align-items:stretch}.card{min-height:132px;transition:border-color .16s ease,transform .16s ease,box-shadow .16s ease}.card:hover{transform:translateY(-2px);box-shadow:0 12px 28px -24px #000}
.chip,.tile{transition:border-color .16s ease,background-color .16s ease}.tile{min-height:48px}.tile-name{line-height:1.35}
article>p,.content-section>p,.content-section>ol,.content-section>ul{max-width:72ch}.content-section p{margin:0 0 1.05em}.content-section li{margin:.35em 0}
.defbox,.example{line-height:1.72}.side-card{box-shadow:0 12px 30px -30px #000}.reference-list li{margin:.45em 0}
.mathml{font-family:"Cambria Math","STIX Two Math","Times New Roman",serif;font-size:1.04em}.mathml[display="inline"]{display:inline math;vertical-align:-.12em;margin:0 .12em}.mathml[display="block"]{display:block math;max-width:100%;overflow-x:auto;overflow-y:hidden;margin:1em auto;padding:.35em 0;text-align:center}.side-card .mathml[display="block"]{font-size:.78em}.content-section h3,.example h3{font-size:15px;margin:1.2em 0 .45em;color:var(--brand)}
@media(max-width:600px){.row{padding:9px 14px}.word{font-size:18px}.search{padding:7px 9px}.hero,.band,.browse-wrap{padding-left:16px;padding-right:16px}.big{font-size:38px}.sub{font-size:16px}.tiles{grid-template-columns:1fr}.concept-wrap{padding:20px 16px 52px}.title{font-size:32px}.lead{font-size:17px}.content-section h2{font-size:19px}}
@page{size:A4 portrait;margin:14mm}
@media print{
  :root{--bg:#fff;--surface:#fff;--ink:#111827;--muted:#4b5563;--line:#d7dce7;--brand:#5b4bd6;--brand2:#0891b2;--soft:#f4f5fb;--box:#f7f8fc;--link:#344fc5}
  html{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  body{background:#fff;font-size:10.5pt;line-height:1.52}
  .shadowbar{font-size:8pt}.top{position:static}.row{max-width:none;padding:7px 0}.search,.nav,.lang{display:none}
  .hero,.band,.browse-wrap,.concept-wrap,.foot{max-width:none;padding-left:0;padding-right:0}
  .hero{padding-top:18px;gap:24px}.big{font-size:31pt}.sub{font-size:12pt}.stats{margin-top:14px}
  .card-grid{grid-template-columns:repeat(3,1fr);gap:8px}.card{min-height:0;padding:10px;break-inside:avoid}
  .chips{gap:6px}.chip{padding:5px 9px}
  .group{break-before:auto}.group-head{break-after:avoid}.tiles{grid-template-columns:repeat(3,1fr);gap:5px}.tile{min-height:0;padding:7px 8px;break-inside:avoid}
  .concept-wrap{display:block;padding-top:12px}.toc,.side{display:none}article{max-width:174mm;margin:0 auto}.title{font-size:27pt}.lead{font-size:12pt}
  article p{orphans:3;widows:3}.content-section{break-inside:auto}.content-section h2,.content-section h3{break-after:avoid;margin-top:22px}.defbox,.example{break-inside:avoid;page-break-inside:avoid}.math,.mathml{break-inside:avoid;page-break-inside:avoid}.mathml[display="block"]{overflow:visible}a[href]:after{content:none!important}
  footer{break-inside:avoid}.foot{padding-top:12px;padding-bottom:0}
}