:root{color-scheme:dark}*{box-sizing:border-box}body,html{margin:0;min-height:100%;font-family:Inter,Arial,Helvetica,sans-serif;background:#0b1020;color:#f5f7ff}.page,body{min-height:100vh}.page{display:grid;place-items:center;padding:24px;background:radial-gradient(circle at top,#18213f 0,#0b1020 55%)}.card{width:min(680px,100%);padding:48px 32px;border:1px solid rgba(255,255,255,.08);border-radius:24px;background:rgba(15,23,42,.82);box-shadow:0 20px 80px rgba(0,0,0,.35);text-align:center}h1{margin:0 0 12px;font-size:clamp(2.4rem,6vw,4rem);line-height:1}p{margin:0;color:#cbd5e1;font-size:clamp(1rem,2vw,1.25rem)}