:root{color-scheme:dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#eee;background:#1d1d1d;line-height:1.7}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:860px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;gap:24px;border-bottom:1px solid #444}header>a{letter-spacing:.2em;font-weight:700}nav{display:flex;flex-wrap:wrap;gap:18px}a{color:inherit;text-underline-offset:4px}a:focus-visible{outline:2px solid white;outline-offset:5px}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.2;margin:36px 0}h2{font-size:1.25rem;margin-top:36px}p,li{color:#d2d2d2}aside{padding:18px;border:1px solid #aaa;border-radius:12px}footer{font-size:.85rem;color:#aaa;border-top:1px solid #444}.lead{font-size:1.2rem}@media(max-width:600px){header{flex-direction:column}header,main,footer{padding:20px}}