:root{--bg:#fff;--panel:#f7f7f8;--panel2:#f0f1f3;--text:#17191d;--muted:#626771;--line:#e2e4e8;--accent:#f48120;--accent2:#d95e00;--code:#14161a;--codeText:#f4f5f7;--shadow:0 10px 32px rgba(18,24,40,.08);--max:900px;--rail:280px;--toc:230px;color-scheme:light}
html[data-theme="dark"]{--bg:#111317;--panel:#171a1f;--panel2:#1d2127;--text:#f5f6f7;--muted:#a9afb9;--line:#2b3038;--accent:#ff8a26;--accent2:#ff9f4a;--code:#090a0c;--codeText:#f5f7fa;--shadow:0 14px 36px rgba(0,0,0,.3);color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:15px/1.68 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration-color:color-mix(in srgb,var(--accent) 65%,transparent);text-underline-offset:3px}.topbar{height:58px;border-bottom:1px solid var(--line);display:flex;align-items:center;position:sticky;top:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(14px);z-index:30}.top-inner{width:100%;display:flex;align-items:center;gap:18px;padding:0 22px}.brand{display:flex;align-items:center;gap:10px;font-weight:760;text-decoration:none;letter-spacing:-.02em}.brand img{width:28px;height:28px}.version{font-size:12px;color:var(--muted);border:1px solid var(--line);padding:2px 7px;border-radius:999px}.top-actions{margin-left:auto;display:flex;gap:8px}.iconbtn,.searchbtn{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;height:36px;padding:0 11px;font:inherit;cursor:pointer}.searchbtn{min-width:220px;text-align:left;color:var(--muted)}.layout{display:grid;grid-template-columns:var(--rail) minmax(0,1fr) var(--toc);min-height:calc(100vh - 58px)}.rail{border-right:1px solid var(--line);padding:22px 14px 60px;position:sticky;top:58px;height:calc(100vh - 58px);overflow:auto}.nav-group{margin:0 0 21px}.nav-title{text-transform:uppercase;font-size:11px;letter-spacing:.09em;color:var(--muted);font-weight:800;padding:0 10px 6px}.nav-link{display:block;padding:7px 10px;border-radius:7px;color:var(--muted);text-decoration:none;margin:1px 0}.nav-link:hover{background:var(--panel);color:var(--text)}.nav-link.active{background:color-mix(in srgb,var(--accent) 11%,var(--bg));color:var(--text);box-shadow:inset 2px 0 var(--accent)}.main{padding:52px 48px 100px;min-width:0}.content{max-width:var(--max);margin:0 auto}.content h1{font-size:42px;line-height:1.08;letter-spacing:-.045em;margin:0 0 20px}.content h2{font-size:26px;line-height:1.2;letter-spacing:-.025em;margin:44px 0 14px;padding-top:10px}.content h3{font-size:19px;margin:30px 0 10px}.content p{margin:13px 0}.content strong{font-weight:750}.content code{font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;background:var(--panel2);border:1px solid var(--line);padding:1px 5px;border-radius:5px}.content pre{background:var(--code);color:var(--codeText);padding:18px 20px;border-radius:11px;overflow:auto;border:1px solid color-mix(in srgb,var(--line) 70%,#000);box-shadow:var(--shadow);margin:18px 0}.content pre code{background:none;border:0;padding:0;color:inherit;font-size:13px}.content blockquote{margin:20px 0;padding:12px 18px;border-left:3px solid var(--accent);background:color-mix(in srgb,var(--accent) 6%,var(--bg));color:var(--muted)}table{border-collapse:separate;border-spacing:0;width:100%;font-size:14px;margin:20px 0;border:1px solid var(--line);border-radius:10px;overflow:hidden}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--panel);font-size:12px;text-transform:uppercase;letter-spacing:.045em}tr:last-child td{border-bottom:0}.toc{border-left:1px solid var(--line);padding:28px 20px;position:sticky;top:58px;height:calc(100vh - 58px);overflow:auto}.toc h4{margin:0 0 10px;font-size:12px;text-transform:uppercase;letter-spacing:.08em}.toc a{display:block;font-size:13px;color:var(--muted);text-decoration:none;padding:4px 0}.toc a:hover{color:var(--text)}.toc .d3{padding-left:12px}.hero{padding:58px 0 38px}.eyebrow{font-size:12px;font-weight:800;color:var(--accent2);letter-spacing:.1em;text-transform:uppercase}.hero h1{max-width:820px;font-size:58px;line-height:1.02;margin:10px 0 18px;letter-spacing:-.055em}.lede{font-size:19px;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;padding:10px 14px;border-radius:8px;text-decoration:none;font-weight:720;border:1px solid var(--line);background:var(--panel)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0}.card{border:1px solid var(--line);background:linear-gradient(145deg,var(--bg),var(--panel));padding:20px;border-radius:12px;box-shadow:0 1px 0 rgba(0,0,0,.02)}.card h3{margin:0 0 6px;font-size:18px}.card p{color:var(--muted);margin:0}.stack{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0}.stack .node{border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:10px;padding:16px;background:var(--panel)}.stack .node b{display:block;font-size:16px}.stack .node span{font-size:13px;color:var(--muted)}.callout{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:var(--panel);margin:24px 0}.callout b{display:block;margin-bottom:4px}.search-modal{position:fixed;inset:0;background:rgba(0,0,0,.36);z-index:80;display:none;align-items:flex-start;justify-content:center;padding-top:10vh}.search-modal.open{display:flex}.search-box{width:min(720px,92vw);max-height:75vh;background:var(--bg);border:1px solid var(--line);box-shadow:0 24px 80px rgba(0,0,0,.3);border-radius:14px;overflow:hidden}.search-input{width:100%;border:0;border-bottom:1px solid var(--line);font:18px inherit;padding:18px;background:var(--bg);color:var(--text);outline:0}.results{padding:8px;max-height:60vh;overflow:auto}.result{display:block;padding:12px;border-radius:8px;text-decoration:none}.result:hover{background:var(--panel)}.result b{display:block}.result span{color:var(--muted);font-size:13px}.mobile-nav{display:none}.footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:25px 0;margin-top:60px}.kicker{color:var(--muted);font-size:13px;margin-bottom:14px}.checklist li{margin:7px 0}.anchor{color:var(--muted);text-decoration:none;margin-left:7px;opacity:0}.content h2:hover .anchor,.content h3:hover .anchor{opacity:1}@media(max-width:1120px){.layout{grid-template-columns:240px minmax(0,1fr)}.toc{display:none}.rail{width:240px}.main{padding:42px 34px}}@media(max-width:760px){.searchbtn{min-width:0;width:42px;font-size:0}.searchbtn:after{content:'⌕';font-size:20px}.layout{display:block}.rail{display:none}.main{padding:32px 18px 70px}.content h1{font-size:36px}.hero h1{font-size:44px}.grid,.stack{grid-template-columns:1fr}.mobile-nav{display:block}.top-inner{padding:0 14px}.version{display:none}.content table{display:block;overflow-x:auto;white-space:nowrap}}
.menubtn{display:none}.rail-scrim{display:none}
@media(max-width:760px){
  .menubtn{display:inline-flex;align-items:center;justify-content:center;font-size:18px;padding:0;width:38px}
  .rail{display:block;position:fixed;z-index:70;left:0;top:58px;bottom:0;width:min(310px,86vw);height:auto;background:var(--bg);transform:translateX(-105%);transition:transform .18s ease;box-shadow:18px 0 45px rgba(0,0,0,.16)}
  .rail.open{transform:translateX(0)}
  .rail-scrim{display:block;position:fixed;z-index:60;inset:58px 0 0;background:rgba(0,0,0,.34);opacity:0;pointer-events:none;transition:opacity .18s ease}
  .rail-scrim.open{opacity:1;pointer-events:auto}
  .brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}
}
.shortcut{float:right}