:root{color-scheme:dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#0d1117;color:#f0f6fc}*{box-sizing:border-box}body{margin:0;line-height:1.75}a{color:#8ab8ff;text-underline-offset:4px}a:hover{color:#fff}a:focus-visible{outline:3px solid #8ab8ff;outline-offset:5px}header,main,footer{max-width:860px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid #30363d}header a{font-weight:700}h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.13;letter-spacing:-.035em;margin:24px 0}h2{font-size:1.45rem;line-height:1.3;margin:36px 0 12px}p{color:#bac4d0}nav{font-size:.9rem}.eyebrow{color:#8ab8ff;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em}.intro{font-size:1.2rem}.card{padding:24px;background:#161b22;border:1px solid #30363d;border-radius:16px;margin:20px 0}.card h2{margin-top:0}.cta{display:inline-block;background:#1f6feb;color:white;font-weight:700;text-decoration:none;padding:12px 20px;border-radius:9px}.muted{font-size:.9rem;color:#a3afbd}li{margin:12px 0}footer{border-top:1px solid #30363d;margin-top:40px;font-size:.9rem}details{padding:16px 0;border-bottom:1px solid #30363d}summary{cursor:pointer;font-weight:600}.skip{position:absolute;top:-100px}.skip:focus{top:0;background:#0d1117;padding:12px}@media(max-width:480px){header,main,footer{padding:20px}.card{padding:18px}header{flex-wrap:wrap}}