:root{color-scheme:light dark;--paper:#f5f6f8;--surface:#fff;--ink:#2e4057;--text:#202937;--muted:#566374;--line:#d8dee6}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--text);font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--ink);text-underline-offset:4px}a:focus-visible{outline:3px solid var(--ink);outline-offset:5px}header,main,footer{width:min(760px,100% - 40px);margin:auto}header{display:flex;align-items:center;justify-content:space-between;padding:30px 0;border-bottom:1px solid var(--line);gap:24px}header a{font-weight:650}main{padding:52px 0 64px}h1{font-size:clamp(34px,7vw,54px);letter-spacing:-1.5px;line-height:1.1;margin:8px 0 22px;font-weight:650}h2{font-size:23px;line-height:1.3;margin:40px 0 12px;letter-spacing:-.4px}p{margin:0 0 20px}li{margin:8px 0}small,.note{font-size:14px;color:var(--muted)}.lead{font-size:21px;line-height:1.55}.fact{border-left:4px solid var(--ink);padding:8px 0 8px 22px;margin:32px 0}.fact p:last-child{margin:0}footer{border-top:1px solid var(--line);padding:26px 0 40px;color:var(--muted);font-size:14px}footer nav{display:flex;flex-wrap:wrap;gap:20px;margin-bottom:16px}code{font-size:.9em;overflow-wrap:anywhere}details{padding:18px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600}details p{margin-top:14px;margin-bottom:0}@media(prefers-color-scheme:dark){:root{--paper:#131a24;--surface:#1e2937;--ink:#b3c8e0;--text:#edf1f6;--muted:#b0bdcc;--line:#35445a}}@media(max-width:400px){header,main,footer{width:calc(100% - 32px)}header{font-size:15px}main{padding-top:36px}}