body{font-family:-apple-system,"Helvetica Neue",Helvetica,Arial,sans-serif;max-width:720px;margin:0 auto;padding:1em;line-height:1.5;color:#222}
h1{font-size:1.6em}h2{font-size:1.2em;margin-top:1.6em}
@media (prefers-color-scheme:dark){body{background:#111;color:#ddd}a{color:#6cb0ff}}