body{margin:0;background:#020914;color:#fff;font-family:Arial;padding:24px}main{max-width:1100px;margin:auto;background:#071a38;padding:24px;border-radius:18px}button,input,select{padding:11px;margin:5px;border-radius:8px}button{background:#d9ad43;font-weight:900}canvas{display:block;width:min(600px,100%);margin:20px auto;background:#03142d;border-radius:50%}