:root{color-scheme:dark;font-family:Arial,Helvetica,sans-serif;background:#020617;color:#f8fafc}*{box-sizing:border-box}body{margin:0;line-height:1.7}a{color:#67e8f9;text-underline-offset:4px}a:focus-visible,summary:focus-visible{outline:3px solid #facc15;outline-offset:5px}header,main,footer{max-width:1160px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;border-bottom:1px solid #334155}header a{text-decoration:none}header strong{font-size:24px;color:white}nav{display:flex;gap:20px;flex-wrap:wrap}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:13px;color:#67e8f9}h1{font-size:clamp(2rem,5vw,3.8rem);line-height:1.1;max-width:950px}h2{font-size:clamp(1.4rem,3vw,2rem);line-height:1.25}p{max-width:78ch;color:#cbd5e1}.intro{font-size:1.2rem}.button{display:inline-block;background:#22d3ee;color:#020617;padding:12px 22px;font-weight:700;text-decoration:none;border-radius:6px;margin:12px 0}.button:hover{background:#a5f3fc}.grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:40px 0}.card{border:1px solid #334155;padding:24px;background:#0f172a;border-radius:10px}.card h2{margin-top:0}section{margin:48px 0}details{border-bottom:1px solid #334155;padding:20px 0}summary{cursor:pointer;font-weight:bold}footer{border-top:1px solid #334155;margin-top:40px}.links{display:flex;flex-wrap:wrap;gap:12px 24px}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:#020617;padding:12px;z-index:10}@media(max-width:640px){.grid{grid-template-columns:1fr}header,main,footer{padding:20px}.card{padding:20px}}