body{font-family:Arial,sans-serif;background-color:#f4f4f4;margin:0;padding:0;display:flex;justify-content:center;align-items:center;height:100vh}.app{width:100vw;height:100vh;display:flex;align-items:center;justify-content:center}.app.dark{background:#333!important;color:#fff}.container{background:#fff;padding:20px;border-radius:8px;width:400px;text-align:center}.container.dark{background:#333;color:#fff}h1{color:#333}.container.dark h1{color:#fff}.input-container{display:flex;justify-content:center;margin-bottom:20px}input[type=text]{padding:10px;width:70%;border:1px solid #ddd;border-radius:4px 0 0 4px;margin-right:10px}.container.dark input[type=text]{background:#555;color:#fff;border:1px solid #444}button{padding:10px 15px;background-color:#28a745;color:#fff;border:none;border-radius:4px;cursor:pointer}button:hover{background-color:#218838}.container.dark button{background-color:#444;color:#fff}ol{list-style-type:none;padding:0}li{display:flex;align-items:center;justify-content:space-between;padding:10px;border-bottom:1px solid #ddd}li:last-child{border-bottom:none}li span{flex-grow:1;margin-left:10px}input[type=checkbox]{margin-right:10px}li button{background-color:#dc3545}li button:hover{background-color:#c82333}.container.dark li button{background-color:#666}