: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:Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:#f4f4f9;display:flex;justify-content:center;padding-top:50px;min-height:100vh;margin:0;box-sizing:border-box}.container{background:#fff;width:450px;padding:2rem;border-radius:15px;box-shadow:0 10px 30px #0000001a;height:fit-content}h1{text-align:center;color:#333;font-weight:800;display:flex;justify-content:center;align-items:center;gap:10px;font-size:2rem;margin-bottom:30px;white-space:nowrap}.form{display:flex;gap:10px;margin-bottom:25px;width:100%}input[type=text]{flex-grow:1;padding:12px;border:1px solid #ddd;border-radius:8px;font-size:16px;transition:.3s}input[type=text]:focus{outline:none;border-color:#5c6bc0}button[type=submit]{padding:12px 25px;background:#5c6bc0;color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:700;cursor:pointer;white-space:nowrap}button[type=submit]:hover{background:#3f51b5}ul{list-style:none;padding:0}li{display:flex;justify-content:space-between;align-items:center;padding:15px 10px;border-bottom:1px solid #f0f0f0}.text-group{display:flex;gap:15px;align-items:center;cursor:pointer}.completed span{text-decoration:line-through;color:#aaa}.text-group span{font-size:18px;color:#555}input[type=checkbox]{accent-color:#4caf50;width:20px;height:20px;cursor:pointer}.delete-btn{background:#ff5252;padding:6px 12px;margin-left:10px;font-size:.8rem;font-weight:700;border:none;color:#fff;border-radius:6px;cursor:pointer}.delete-btn:hover{background:#d32f2f}