:root{color-scheme:light dark;--fg:#1d1d1f;--muted:#6e6e73;--bg:#fff;--link:#0066cc;--rule:#e5e5ea}
@media(prefers-color-scheme:dark){:root{--fg:#f5f5f7;--muted:#a1a1a6;--bg:#111;--link:#409cff;--rule:#333}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text",Inter,system-ui,sans-serif}
main{max-width:42rem;margin:0 auto;padding:3rem 1.25rem 4rem}
h1{font-size:2rem;line-height:1.2;margin:0 0 .25rem}
h2{font-size:1.25rem;margin:2rem 0 .5rem}
p,li{margin:.5rem 0}
.muted{color:var(--muted)}
a{color:var(--link)}
hr{border:0;border-top:1px solid var(--rule);margin:2rem 0}
footer{font-size:.9rem;color:var(--muted)}