body{font-family:sans-serif;padding:2rem}input,button{margin:.5rem 0;padding:.5rem}table{border-collapse:collapse;width:100%;margin-top:1em}th,td{border:1px solid #ccc;padding:8px;text-align:left}th{background:#f3f3f3}#spinner{display:none;margin:1rem auto;width:24px;height:24px;border:4px solid #f3f3f3;border-top:4px solid #333;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}