:root{color-scheme:dark;--bg: #071020;--card: #0f1720;--accent: #2f108a;--muted: #94a3b8}*,*:before,*:after{box-sizing:border-box}html,body{height:100%;margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#e6eef8;background:radial-gradient(1200px 600px at 10% 10%,rgba(123,97,255,.12),transparent),radial-gradient(900px 400px at 90% 90%,rgba(0,210,255,.04),transparent),var(--bg);background-attachment:fixed}.card-shell{width:100%;max-width:720px;background:linear-gradient(180deg,#ffffff08,#ffffff03);border-radius:24px;padding:48px;box-shadow:0 20px 60px #02061773;border:1px solid rgba(255,255,255,.04);text-align:center}