:root{color-scheme:light dark;--bg:#f4f8ff;--card:rgba(255,255,255,.86);--text:#172033;--muted:#5d687a;--accent:#3767d6;--line:rgba(55,103,214,.18)}
@media(prefers-color-scheme:dark){:root{--bg:#0d1422;--card:rgba(25,35,53,.92);--text:#edf3ff;--muted:#afbdd2;--accent:#8eb0ff;--line:rgba(142,176,255,.22)}}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 85% 0,rgba(66,120,239,.18),transparent 35rem),var(--bg);color:var(--text);font:16px/1.62 system-ui,-apple-system,"Segoe UI",sans-serif}main{max-width:900px;margin:auto;padding:28px 18px 70px}header,article{background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:0 12px 35px rgba(27,54,110,.09);padding:24px clamp(20px,5vw,48px);margin-bottom:18px}h1{font-size:clamp(28px,5vw,42px);line-height:1.12;margin:.25em 0}h2{font-size:22px;line-height:1.25;margin:1.55em 0 .5em}h3{font-size:18px;margin:1.2em 0 .35em}p,li{max-width:78ch}a{color:var(--accent)}nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}nav a{padding:7px 11px;border-radius:12px;background:rgba(90,130,220,.1);text-decoration:none}.meta,.note{color:var(--muted)}.note{border-left:3px solid var(--accent);padding-left:14px}.limits{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}.limit{padding:14px;border:1px solid var(--line);border-radius:16px}.limit strong{display:block;font-size:20px;color:var(--accent)}footer{text-align:center;color:var(--muted);padding:12px}