:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}body{font-family:sans-serif;background-color:#f4f4f4;color:#333;margin:0;height:100vh;display:flex;justify-content:center;align-items:center}.app-container{width:100%;max-width:600px;padding:20px;background-color:#fff;box-shadow:0 2px 4px #0000001a;border-radius:8px}.task-form{display:flex;margin-bottom:20px}.task-form input{flex-grow:1;padding:10px;border:1px solid #ddd;border-radius:4px;font-size:16px}.task-form button{padding:10px 15px;border:none;background-color:#007bff;color:#fff;border-radius:4px;cursor:pointer;margin-left:10px}.task-list{list-style:none;padding:0}.task-list li{display:flex;justify-content:space-between;align-items:center;padding:15px;border-bottom:1px solid #eee}.task-list li:last-child{border-bottom:none}.task-list li.completed span{text-decoration:line-through;color:#888}.task-list li span{cursor:pointer}.task-list li button{padding:5px 10px;border:none;background-color:#dc3545;color:#fff;border-radius:4px;cursor:pointer}