:root{--bg:#f6f7fb;--card:#fff;--ink:#172744;--text:#2b3a55;--muted:#58647a;--line:#d9dfe9;--link:#284dc7;--button:#284dc7;--button-hover:#2243b0;--button-press:#1c3896;--button-ink:#fff;--tile:#e7ebf4}
@media (prefers-color-scheme:dark){:root{--bg:#0e1117;--card:#161b24;--ink:#e7ebf3;--text:#cdd4e1;--muted:#9aa3b5;--line:#263042;--link:#8ea8ff;--button:#3d63e0;--button-hover:#3557c8;--button-press:#2d4bb0;--button-ink:#fff;--tile:#222a37}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,sans-serif;line-height:1.6;padding:0 16px}
header,main,footer{max-width:720px;margin:0 auto}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;letter-spacing:-.03em;color:var(--ink);text-decoration:none}
.brand img{border-radius:8px}
nav{display:flex;flex-wrap:wrap;gap:16px}
a{color:var(--link);text-underline-offset:4px}
a:focus-visible{outline:2px solid var(--link);outline-offset:4px}
h1{font-size:clamp(32px,6vw,44px);letter-spacing:-.03em;line-height:1.1;margin:40px 0 8px}
h2{font-size:20px;margin:36px 0 8px}
.updated{color:var(--muted);font-size:14px;margin:0 0 24px}
p,li{font-size:16px;color:var(--text)}
ul{padding-left:20px}
li{margin:8px 0}
footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding:32px 0 48px;margin-top:48px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}