:root{--brand:#1f2a44;--accent:#3b5bdb;--bg:#f6f7f9;--card:#fff;--text:#1d2330;--muted:#5d6675;--line:#e3e6eb;--code:#f1f3f5}
@media (prefers-color-scheme:dark){:root{--brand:#141a2b;--accent:#8ea5ff;--bg:#10131a;--card:#181c25;--text:#e6e8ec;--muted:#9aa3b2;--line:#2a303c;--code:#222835}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
.site-header{background:var(--brand);color:#fff;padding:18px 0}
.site-header .wrap{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:18px;flex:1 1 auto}
.search{position:relative;flex:1 1 320px;max-width:420px}
.search input{width:100%;padding:10px 14px;border-radius:8px;border:0;font-size:15px;background:#fff;color:#1d2330}
.results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.18);max-height:60vh;overflow:auto;z-index:10}
.results a{display:block;padding:10px 14px;text-decoration:none;color:var(--text);border-bottom:1px solid var(--line)}
.results a:hover,.results a.active{background:var(--code)}
.results small{display:block;color:var(--muted)}
.results .none{padding:12px 14px;color:var(--muted)}
main.wrap{padding-top:28px;padding-bottom:56px;min-height:60vh}
.hero h1{margin:8px 0 24px;font-size:30px}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:18px}
.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--accent)}
.crumbs .sep{margin:0 8px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.cards.small{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));margin-top:12px}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;text-decoration:none;color:var(--text);transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--accent);box-shadow:0 4px 16px rgba(0,0,0,.06)}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0 0 10px;color:var(--muted);font-size:14px}
.card .count{font-size:13px;color:var(--muted)}
.coll-head h1,.article h1{margin:0 0 8px;font-size:28px;line-height:1.25}
.lead{color:var(--muted);margin:0 0 8px}
.meta{color:var(--muted);font-size:14px;margin:0 0 20px}
.article-list{list-style:none;padding:0;margin:0 0 24px;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.article-list li+li{border-top:1px solid var(--line)}
.article-list a{display:block;padding:14px 18px;text-decoration:none;color:var(--text)}
.article-list a:hover{background:var(--code)}
.article-list .t{display:block;font-weight:600}
.article-list .s{display:block;color:var(--muted);font-size:14px}
.subcoll{margin-top:28px}
.subcoll h2{font-size:20px;margin:0 0 10px}.subcoll h2 a{color:var(--text);text-decoration:none}.subcoll h2 a:hover{color:var(--accent)}
.article{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:32px clamp(18px,4vw,44px)}
.content{overflow-wrap:break-word}
.content h2{font-size:24px;margin:32px 0 10px}.content h3{font-size:20px;margin:28px 0 8px}.content h4{font-size:17px;margin:22px 0 6px}.content h5{font-size:15px;margin:18px 0 6px}
.content p{margin:0 0 14px}.content p.no-margin{margin:0}
.content ul,.content ol{padding-left:24px;margin:0 0 14px}.content li>p{margin:0 0 4px}
.content hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.content code{background:var(--code);padding:1px 5px;border-radius:4px;font-size:.92em}
.content pre{background:var(--code);padding:14px;border-radius:8px;overflow:auto}.content pre code{background:none;padding:0}
figure.img{margin:18px 0}figure.img img{max-width:100%;height:auto;border-radius:6px;display:block}
figure.align-center img{margin:0 auto}figure.align-right img{margin-left:auto}
.video{position:relative;padding-top:56.25%;margin:18px 0;border-radius:8px;overflow:hidden;background:#000}
.video iframe{position:absolute;inset:0;width:100%;height:100%}
.callout{border:1px solid var(--line);border-left-width:4px;border-radius:8px;padding:14px 16px;margin:18px 0;color:#1d2330}
.callout a{color:#2b4acb}
details.collapsible{border:1px solid var(--line);border-radius:8px;margin:14px 0;padding:0 16px}
details.collapsible summary{cursor:pointer;padding:12px 0;font-weight:500}
details.collapsible summary p{display:inline;margin:0}
.collapsible-body{padding-bottom:12px}
.table-wrap{overflow-x:auto;margin:18px 0}
.content table{border-collapse:collapse;width:100%}
.content td{border:1px solid var(--line);padding:8px 10px;vertical-align:top}
.content td[style]{color:#1d2330}
.toc{background:var(--code);border-radius:8px;padding:12px 16px;margin:0 0 20px}.toc ul{margin:6px 0 0;padding-left:18px}.toc .l3{margin-left:14px}
.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px;padding:20px 0}