:root{color-scheme:light dark;--bg:#f5f7fb;--panel:#fff;--ink:#18263a;--muted:#4b5d73;--line:#d5deea;--accent:#2459ba;--soft:#e9effa}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent);text-underline-offset:4px}a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}header,main,footer{max-width:1100px;margin:auto;padding-inline:28px}header{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:88px;border-bottom:1px solid var(--line)}.brand{font-size:23px;font-weight:750;letter-spacing:-.7px;text-decoration:none;color:var(--ink)}nav{display:flex;gap:18px}nav a{padding:8px 0}nav [aria-current]{font-weight:750;color:var(--ink)}main{padding-block:46px 28px}.intro{max-width:800px;margin-bottom:42px}.eyebrow{font-size:12px;letter-spacing:.15em;font-weight:750;color:var(--accent);margin:0 0 10px}h1{font-size:clamp(32px,5vw,52px);line-height:1.12;letter-spacing:-1.6px;margin:0 0 22px}h2{font-size:23px;line-height:1.3;letter-spacing:-.5px;margin:0 0 18px}p{margin:0 0 16px}.lead{font-size:20px;line-height:1.65;color:var(--muted);max-width:720px}.return{display:inline-block;background:var(--accent);color:white;text-decoration:none;padding:11px 20px;border-radius:8px;font-weight:650;margin-top:8px}section{margin-bottom:24px;padding:28px;background:var(--panel);border:1px solid var(--line);border-radius:12px}figure{margin:24px 0 32px}figure:last-child{margin-bottom:0}figure img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:8px}figcaption{margin-top:12px;color:var(--muted);font-size:15px}figcaption strong{display:block;color:var(--ink);margin-bottom:4px}.columns{display:grid;grid-template-columns:1.15fr 1fr;gap:24px}.columns section{min-width:0}ol,ul{padding-left:24px;margin:0}li{padding-left:6px;margin-bottom:16px}li:last-child{margin-bottom:0}.note{background:var(--soft)}.reuse{border-top:3px solid var(--accent)}footer{padding-block:18px 40px;font-size:13px;color:var(--muted)}@media(prefers-color-scheme:dark){:root{--bg:#111923;--panel:#1b2735;--ink:#edf3fc;--muted:#bac9dc;--line:#526479;--accent:#a6c4ff;--soft:#23334b}.return{color:#112440}}@media(max-width:700px){header,main,footer{padding-inline:18px}header{min-height:76px;flex-wrap:wrap;padding-block:12px}.columns{display:block}main{padding-top:30px}section{padding:22px 20px}h2{font-size:21px}.lead{font-size:18px}}