*{box-sizing:border-box}
body{font-family:system-ui,Arial;margin:0;min-height:100vh;display:grid;place-items:center;background:#0b1220;color:#e8eefc}
.container{padding:32px;border:1px solid rgba(255,255,255,.12);border-radius:16px;background:rgba(255,255,255,.04);max-width:720px;text-align:center}
.btn{display:inline-block;margin-top:16px;padding:12px 18px;border:0;border-radius:12px;cursor:pointer;background:#fff;color:#0b1220;font-weight:700;text-decoration:none}
.btn:hover{transform:translateY(-1px)}