:root{--bg:#ffffff;--fg:#1f2330;--muted:#5b6275;--accent:#4F46E5;--card:#f5f6fb;--line:#e3e5ef}
@media (prefers-color-scheme:dark){:root{--bg:#12131a;--fg:#e8e9f0;--muted:#a3a8b8;--accent:#8b8cf8;--card:#1c1d27;--line:#2c2e3b}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif}
main{max-width:780px;margin:0 auto;padding:32px 16px 64px}
header{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.logo{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#6366F1,#3730A3);display:grid;place-items:center;color:#fff;font-weight:700}
h1{font-size:1.8rem;margin:.2em 0}h2{font-size:1.2rem;margin-top:2em;border-top:1px solid var(--line);padding-top:1.2em}
a{color:var(--accent)}.muted{color:var(--muted);font-size:.92rem}
.card{background:var(--card);border-radius:12px;padding:14px 18px;margin:16px 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}td,th{border:1px solid var(--line);padding:8px;text-align:left;vertical-align:top}
nav a{margin-right:16px}footer{margin-top:48px;border-top:1px solid var(--line);padding-top:16px}