body{margin:0;height:100vh;display:flex;justify-content:center;align-items:center;background-color:var(--background);color:var(--text-color)}.container{width:525px;height:600px;background-color:var(--container-bg);border-radius:8px;padding:20px;box-shadow:0 0 10px #0000001a;display:flex;flex-direction:column;overflow:hidden}.theme-btn{position:absolute;top:20px;right:30px;background-color:var(--accent-color);color:#fff;font-weight:700;font-size:.85rem;border:none;border-radius:20px;padding:6px 14px;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 6px #0003}.theme-btn:hover{background-color:var(--accent-hover);transform:scale(1.05)}.content{flex:1;overflow-y:auto}.input{width:408px;padding:8px 0;border:none;border-bottom:2px solid var(--border-color);outline:none;font-size:1rem;transition:border-color .3s;background-color:transparent;color:var(--text-color)}.input:focus{border-bottom-color:var(--accent-hover)}.input::placeholder{color:var(--placeholder-color);font-style:italic}.add-btn{color:var(--container-bg);font-weight:700;font-size:1rem;border:none;border-radius:5px;background-color:var(--btn-color);padding:8px 16px;cursor:pointer;margin-left:10px;transition:background-color .3s}.add-btn:hover{background-color:var(--text-color)}.task input{border-bottom:2px solid var(--border-color);outline:none;font-size:16px}.wrapper{width:462px;margin:10px 0;border:2px solid var(--border-color);border-radius:5px;padding:10px;display:flex;align-items:center}.checkbox{width:16px;height:16px;accent-color:var(--text-color);margin-right:10px;cursor:pointer}.taskText{font-size:1.125rem;cursor:pointer}.checkbox:checked+.taskText{text-decoration:line-through;color:var(--placeholder-color)}.delete{color:var(--text-color);margin-left:auto;cursor:pointer;border:none;background-color:transparent;transition:transform .3s ease}.delete:hover{transform:scale(1.5)}footer{margin-top:auto;padding-top:10px;border-top:1px solid #ddd;text-align:left}q{font-style:italic}p{color:var(--placeholder-color)}.filter-btn{color:#fff;font-weight:700;font-size:.8rem;padding:5px 15px;margin:10px;border:none;border-radius:30px;background-color:var(--accent-color);cursor:pointer;transition:background-color .3s}.filter-btn:hover{background-color:var(--accent-hover)}.filter-btn.active{background:var(--accent-hover)}@media screen and (max-width:600px){.container{width:310px}.input{width:205px}.wrapper{width:260px}}*{box-sizing:border-box}body{margin:0;height:100vh;display:flex;justify-content:center;align-items:center}:root{--bg-color: #f5f5f5;--container-bg: #ffffff;--text-color: #000000;--border-color: #ccc;--accent-color: #7a7a7a;--accent-hover: #000000;--placeholder-color: #888;--background: #f5f5f5;--btn-color: #7a7a7a}body.dark{--bg-color: #121212;--container-bg: #1e1e1e;--text-color: #f5f5f5;--border-color: #555;--accent-color: #444;--accent-hover: #000000;--placeholder-color: #aaa;--background: #333333;--btn-color: #b6b6b6}