:root{--bg:#fbfaf7;--fg:#1d1d1f;--mut:#6b6b70;--acc:#2b4a8b;--line:#e4e2dc}
@media(prefers-color-scheme:dark){:root{--bg:#141416;--fg:#ececee;--mut:#9a9aa2;--acc:#8fb0ff;--line:#2a2a2e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif}
main{max-width:42rem;margin:0 auto;padding:2.5rem 1rem 4rem}
h1{font-size:2rem;margin:.2rem 0 .3rem}h2{font-size:1.2rem;margin:2rem 0 .4rem}
p,li{color:var(--fg)}.mut{color:var(--mut)}a{color:var(--acc)}
nav{display:flex;gap:1rem;padding-bottom:1rem;border-bottom:1px solid var(--line);margin-bottom:1.5rem}
nav a{text-decoration:none;font-weight:600}
footer{margin-top:3rem;padding-top:1rem;border-top:1px solid var(--line);color:var(--mut);font-size:.9rem}