body{background:#030712;margin:0;font-family:system-ui}.sigil{border:3px solid #0ff;border-radius:50%;width:220px;height:220px;margin:40px auto;animation:18s linear infinite spin;box-shadow:0 0 30px #0ff}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}