:root{font-family:system-ui,sans-serif;color:#111827;background:#f8fafc}body{max-width:1100px;margin:auto;padding:16px;line-height:1.6}nav{display:flex;gap:16px}a{color:#1d4ed8}.skip{position:absolute;left:-999px}.skip:focus{left:10px}section,aside{background:white;padding:20px;margin:16px 0;border-radius:12px}a:focus-visible{outline:3px solid #f59e0b}h1{font-size:clamp(1.8rem,5vw,2.8rem)}@media(max-width:600px){body{padding:12px}}