html,body{margin:0;background:#111213;color:#fff;font-family:Arial,sans-serif}#startup{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;box-sizing:border-box}#startup strong{font-size:28px}#startup p{color:#babbbf}#startup button{background:#d3ff35;color:#111;border:0;border-radius:12px;padding:14px 24px;font:inherit;cursor:pointer}#startup button[hidden]{display:none}