body{font:17px/1.6 -apple-system,system-ui,sans-serif;max-width:640px;margin:48px auto;padding:0 20px;color:#15181d;background:#f3f2ed}
@media(prefers-color-scheme:dark){body{color:#f1f2f4;background:#0c0f14}a{color:#4da3ff}}
h1{font-size:2rem}