body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;max-width:760px;margin:40px auto;padding:0 20px;line-height:1.6;color:#222}
h1{font-size:1.8em}h2{font-size:1.2em;margin-top:1.6em}nav a{margin-right:16px}footer{margin-top:48px;font-size:.9em;color:#666}