:root{--bg:#f7f7f5;--fg:#1d1d1b;--muted:#5b5b57;--line:#e3e3df;--accent:#1f5f8b}
@media (prefers-color-scheme:dark){:root{--bg:#141413;--fg:#ecebe6;--muted:#a7a6a0;--line:#2c2c2a;--accent:#7fb3d9}}
*{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:48px 20px 64px}
h1{font-size:1.9rem;line-height:1.2;margin:0 0 .4rem}
h2{font-size:1.15rem;margin:2rem 0 .5rem}
.muted{color:var(--muted)}
a{color:var(--accent)}
nav{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:36px;font-size:.95rem}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);font-size:.9rem;color:var(--muted)}
ul{padding-left:1.2rem}