body{background-color:#f4f4f9;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}input{border:1px solid #ccc;border-radius:4px;padding:8px}button{cursor:pointer;color:#fff;background:#007bff;border:none;border-radius:4px;margin-left:5px;padding:8px 12px}button:hover{background:#0056b3}li{background:#fff;border:1px solid #ddd;border-radius:4px;margin-bottom:8px;padding:10px}