:root{color-scheme:light dark;--bg:#f2f2f7;--card:#fff;--text:#1c1c1e;--muted:#6c6c70;--line:#d1d1d6;--primary:#0a6cff}
@media (prefers-color-scheme:dark){:root{--bg:#000;--card:#1c1c1e;--text:#f2f2f7;--muted:#a1a1a6;--line:#38383a;--primary:#3d8bff}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main,header,footer{max-width:760px;margin:0 auto;padding:0 16px}
header{display:flex;align-items:center;gap:12px;padding-top:24px;padding-bottom:8px;flex-wrap:wrap}
header img{width:40px;height:40px;border-radius:9px}
header a.brand{font-weight:700;font-size:20px;color:var(--text);text-decoration:none}
header nav{margin-left:auto;display:flex;gap:14px;font-size:15px;flex-wrap:wrap}
a{color:var(--primary)}
h1{font-size:34px;line-height:1.15;letter-spacing:-.02em;margin:16px 0 8px}
h2{font-size:20px;margin:0 0 8px}
p{margin:0 0 12px}
ul{margin:0 0 12px;padding-left:22px}
.lead{color:var(--muted);font-size:18px}
.note{color:var(--muted);font-size:14px}
section{background:var(--card);border-radius:14px;padding:18px;margin:14px 0}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;vertical-align:top;padding:8px 8px 8px 0;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:0}
.wrap{overflow-x:auto}
footer{padding-top:8px;padding-bottom:32px;color:var(--muted);font-size:14px}
footer a{margin-right:12px}