html,body,#root{margin:0;padding:0;height:100%}button{background:#1f2937;color:#fff;border:0;padding:8px 10px;border-radius:6px;cursor:pointer}button+button{margin-top:8px}button:hover{filter:brightness(1.1)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}