:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#1f2933;background:#f4f6f8}*{box-sizing:border-box}body{margin:0;min-height:100vh}.container{min-height:100vh;display:grid;place-items:center;padding:1rem}.card{width:100%;max-width:28rem;background:#fff;border-radius:14px;padding:1.5rem;box-shadow:0 10px 24px #1018281f;text-align:center}h1{margin-top:0;margin-bottom:1rem;font-size:1.4rem}.hidden-input{display:none}.selection-area p{margin:0 0 1rem;font-size:1rem}.actions{display:flex;gap:.75rem;justify-content:center}button{border:0;border-radius:10px;padding:.75rem 1rem;font-size:1rem;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.7}.primary{background:#0069d9;color:#fff}.secondary{background:#e5e7eb;color:#111827}.error{margin-top:1rem;color:#b42318;font-size:.95rem}@media (max-width: 540px){.actions{flex-direction:column}button{width:100%}}