:root{--bg:#fff;--fg:#1c1c1e;--muted:#6b6b70;--card:#f2f2f7;--accent:#0a64d8;--line:#e0e0e6}
@media (prefers-color-scheme:dark){:root{--bg:#000;--fg:#f2f2f7;--muted:#a1a1a8;--card:#1c1c1e;--accent:#4da3ff;--line:#2c2c2e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text",Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 20px 64px}
h1{font-size:2.2rem;line-height:1.15;margin:.2em 0}
h2{margin-top:2em;font-size:1.4rem}
a{color:var(--accent)}
.lead{font-size:1.15rem;color:var(--muted)}
table{width:100%;border-collapse:collapse;margin:1em 0}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{width:38%}
.card{background:var(--card);border-radius:14px;padding:16px 18px;margin:1em 0}
nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:8px}
footer{margin-top:3em;color:var(--muted);font-size:.9rem}
details{border-bottom:1px solid var(--line);padding:10px 0}
summary{cursor:pointer;font-weight:600}