body{font-family:Arial,sans-serif;margin:0;padding:0;background:#f8f9fa;min-height:100vh}h1{background:#2c3e50;color:#fff;padding:25px;margin:0;text-align:center;box-shadow:0 2px 4px #0000001a;letter-spacing:1px}input,select{padding:8px;border:1px solid #ddd;border-radius:4px}button{padding:8px 12px;cursor:pointer;border:none;border-radius:4px;background:#007bff;color:#fff}button:hover:not(:disabled){background:#0056b3}button:disabled{opacity:.5;cursor:not-allowed;background:#ccc}