: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}}.add-todo-form{display:flex;justify-content:center;gap:10px;margin-top:15px}.add-todo-input{flex:1;padding:10px;border:1px solid #ddd;border-radius:8px;font-size:1rem;outline:none;transition:border .2s ease-in-out,box-shadow .2s ease-in-out}.add-todo-input:focus{border-color:#4f8cff;box-shadow:0 0 6px #4f8cff66}.add-todo-btn{padding:10px 16px;border:none;border-radius:8px;background:#4f8cff;color:#fff;font-size:1rem;cursor:pointer;transition:background .2s ease-in-out,transform .1s ease-in-out}.add-todo-btn:hover{background:#3b6fd1}.add-todo-btn:active{transform:scale(.97)}.todo-container{max-width:500px;margin:50px auto;padding:20px;background:#fff;border-radius:12px;box-shadow:0 4px 12px #0000001a;text-align:center}.title{margin-bottom:20px;font-size:1.8rem;color:#333}.todo-list{list-style:none;padding:0;margin-top:20px}.todo-item{display:flex;justify-content:space-between;align-items:center;background:#f9f9f9;padding:10px 15px;margin-bottom:10px;border-radius:8px;transition:background .2s ease-in-out}.todo-item:hover{background:#f1f1f1}.todo-item.completed .todo-text{text-decoration:line-through;color:gray}.todo-left{display:flex;align-items:center;gap:10px}.todo-text{font-size:1rem;color:#333}.delete-btn{background:#ff4d4d;border:none;padding:6px 10px;color:#fff;border-radius:6px;cursor:pointer;transition:background .2s ease-in-out}.delete-btn:hover{background:#e63939}.muted{color:gray;font-style:italic;margin-top:10px}.error{color:#d9534f;font-weight:700;margin-top:10px}