:root{color-scheme:dark;font-family:Inter,system-ui,sans-serif;background:#0b1020;color:#e8ecf5}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#1d2d55,#0b1020 55%)}.card{width:min(90%,680px);padding:48px;border:1px solid #2f416b;border-radius:24px;background:#111a30cc;box-shadow:0 24px 80px #0008}.mark{display:inline-grid;place-items:center;min-width:52px;height:52px;padding:0 12px;border-radius:14px;background:#4f8cff;color:white;font-weight:800}h1{font-size:clamp(2rem,7vw,4rem);line-height:1;margin:28px 0 16px}p{color:#b9c4dc;font-size:1.15rem;line-height:1.7}nav{display:flex;gap:20px;flex-wrap:wrap;margin-top:30px}a{color:#8db5ff;text-decoration:none}a:hover{text-decoration:underline}