:root{--bg:#fff;--fg:#1d1d1f;--muted:#5f6368;--line:#e3e3e3;--link:#0b57d0}
@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#ececec;--muted:#a0a0a0;--line:#2c2c2c;--link:#8ab4f8}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 16px 64px}
header a{color:var(--fg);text-decoration:none;font-weight:700;letter-spacing:.02em}
h1{font-size:1.8rem;margin:32px 0 4px}
h2{font-size:1.15rem;margin:28px 0 6px}
p,li{color:var(--fg)}
.muted{color:var(--muted);font-size:.9rem}
a{color:var(--link)}
footer{border-top:1px solid var(--line);margin-top:48px;padding-top:16px;font-size:.9rem;color:var(--muted)}
footer a{margin-right:16px}