:root{--ink:#132236;--muted:#64768a;--line:#dbe4ec;--paper:#f8fafc;--blue:#d8e9f6;--accent:#3867a6;--accent-dark:#244a7d;--sans:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.6}.site-shell{width:min(100% - 44px,1040px);margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.035em;text-decoration:none}.brand-symbol{display:grid;place-items:center;width:28px;height:28px;border:1px solid var(--accent);color:var(--accent);font-size:1.2rem;font-weight:400;line-height:1}nav{display:flex;flex-wrap:wrap;gap:21px}nav a{color:var(--muted);font-size:.88rem;text-decoration:none}nav a:hover,nav a:focus-visible,nav a.active{color:var(--accent)}.intro-block{max-width:780px;padding:clamp(74px,12vw,140px) 0 92px}.eyebrow{margin:0;color:var(--accent);font-size:.72rem;font-weight:850;letter-spacing:.14em;text-transform:uppercase}.intro-block h1,.page h1{margin:17px 0 20px;font-size:clamp(3rem,8vw,7rem);line-height:.96;letter-spacing:-.09em}.lede{max-width:600px;margin:0;color:var(--muted);font-size:clamp(1.05rem,2vw,1.28rem);line-height:1.75}.index-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:64px;padding:35px 0 100px;border-top:1px solid var(--line)}.index-heading h2{max-width:240px;margin:12px 0 0;font-size:clamp(1.7rem,4vw,2.8rem);line-height:1.05;letter-spacing:-.06em}.index-list{border-top:1px solid var(--line)}.index-list a{display:grid;grid-template-columns:42px 1fr 28px;align-items:center;gap:15px;padding:18px 0;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}.index-list a:hover,.index-list a:focus-visible{color:var(--accent)}.index-code,.note-number{font:800 .72rem/1 ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--accent)}.index-list strong{display:block;font-size:1rem}.index-list small{display:block;margin-top:3px;color:var(--muted);font-size:.9rem}.chevron{justify-self:end;font-size:1.15rem}.page{padding:clamp(70px,11vw,120px) 0 100px}.page h1{max-width:850px}.page--narrow{max-width:720px}.prose{max-width:640px;margin:0 0 34px;color:var(--muted);font-size:1.08rem}.prose p{margin:0 0 1.2em}.note-stack{margin:45px 0 46px;border-top:1px solid var(--line)}.note-stack article{display:grid;grid-template-columns:48px 1fr;gap:20px;padding:25px 0;border-bottom:1px solid var(--line)}.note-stack h2{margin:0 0 7px;font-size:1.4rem;letter-spacing:-.04em}.note-stack p{max-width:650px;margin:0;color:var(--muted)}.back-link{display:inline-flex;gap:9px;color:var(--ink);font-size:.9rem;font-weight:800;text-decoration:none}.back-link:hover,.back-link:focus-visible{color:var(--accent)}.button{display:inline-flex;padding:11px 17px;background:var(--accent-dark);color:#fff;text-decoration:none;font-weight:800}.site-footer{display:flex;justify-content:space-between;gap:20px;padding:22px 0 34px;border-top:1px solid var(--line);color:var(--muted);font-size:.78rem}.error-page{width:min(100% - 44px,760px);min-height:100vh;margin:auto;display:grid;align-content:center;padding:40px}.error-page h1{max-width:650px;margin:17px 0;font-size:clamp(2.8rem,8vw,6.2rem);line-height:.95;letter-spacing:-.08em}.skip-link{position:absolute;left:-999px;top:10px}.skip-link:focus{left:10px;z-index:3;padding:8px 12px;background:#fff;color:var(--ink)}@media(max-width:700px){.site-shell{width:min(100% - 28px,1040px)}.site-header{align-items:flex-start;flex-direction:column;padding:20px 0}.intro-block{padding:68px 0 76px}.index-layout{grid-template-columns:1fr;gap:32px}.note-stack article{grid-template-columns:34px 1fr}.site-footer{flex-direction:column;gap:5px}.error-page{width:min(100% - 28px,760px);padding:28px}}