: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}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f5f5f5;color:#333;min-height:100vh;display:flex;justify-content:center;align-items:center;padding:0}.container{width:100%;max-width:500px;background:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;overflow:hidden}header{padding:20px;background:#4a90e2;color:#fff;text-align:center}h1{font-size:2rem;font-weight:500}.todo-form{display:flex;padding:16px;border-bottom:1px solid #eee}.todo-input{flex:1;padding:12px 16px;font-size:1.1rem;border:1px solid #ddd;border-radius:4px 0 0 4px;outline:none}.todo-input:focus{border-color:#4a90e2;box-shadow:0 0 0 2px #4a90e233}.btn-add{padding:0 24px;font-size:1.1rem;background:#4a90e2;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer}.btn-add:hover{background:#357abd}.todo-list-section{padding:8px 0}.todo-list{list-style:none}.todo-item{display:flex;align-items:center;padding:12px 16px;border-bottom:1px solid #eee}.todo-checkbox{margin-right:12px;width:20px;height:20px;cursor:pointer}.todo-text{flex:1;font-size:1.1rem;cursor:pointer;-webkit-user-select:none;user-select:none}.completed .todo-text{text-decoration:line-through;color:#999;opacity:.8}.btn-delete{background:none;border:none;font-size:1.6rem;color:#999;cursor:pointer;padding:4px 8px;line-height:1;opacity:.6}.btn-delete:hover{color:#e74c3c;opacity:1}.todo-footer{padding:12px 16px;color:#777;font-size:.95rem;border-top:1px solid #eee;display:flex;justify-content:center}