.app{max-width:600px;margin:0 auto;padding:20px}.app-header{text-align:center;margin-bottom:30px}.app-header h1{font-size:2rem;color:#2c3e50;margin-bottom:1rem}.user-info{display:flex;align-items:center;justify-content:center;gap:1rem;margin-top:1rem}.user-name{font-size:1rem;color:#555}.logout-button{padding:.5rem 1rem;font-size:.875rem;background-color:#e74c3c;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .2s}.logout-button:hover{background-color:#c0392b}.app-main{background:#fff;border-radius:8px;padding:20px;box-shadow:0 2px 4px #0000001a}.todo-item{display:flex;align-items:center;gap:12px;padding:12px;background-color:#f9f9f9;border-radius:4px;transition:background-color .2s}.todo-item:hover{background-color:#f0f0f0}.todo-item.completed{opacity:.6}.todo-checkbox{width:20px;height:20px;cursor:pointer}.todo-text{flex:1;font-size:1rem;word-break:break-word}.todo-item.completed .todo-text{text-decoration:line-through;color:#999}.todo-delete-button{padding:6px 12px;background-color:#e74c3c;color:#fff;border:none;border-radius:4px;font-size:.9rem;cursor:pointer;transition:background-color .2s}.todo-delete-button:hover{background-color:#c0392b}.todo-delete-button:active{background-color:#a93226}.todo-list{display:flex;flex-direction:column;gap:20px}.todo-section h2{font-size:1.2rem;color:#555;margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid #eee}.todo-items{list-style:none;display:flex;flex-direction:column;gap:8px}.todo-empty{text-align:center;padding:40px 20px;color:#999}.todo-empty p{font-size:1rem}.todo-form{display:flex;gap:10px;margin-bottom:20px}.todo-input{flex:1;padding:12px;border:1px solid #ddd;border-radius:4px;font-size:1rem}.todo-input:focus{outline:none;border-color:#4a90e2}.todo-add-button{padding:12px 24px;background-color:#4a90e2;color:#fff;border:none;border-radius:4px;font-size:1rem;cursor:pointer;transition:background-color .2s}.todo-add-button:hover{background-color:#357abd}.todo-add-button:active{background-color:#2a5f8f}.user-name-input-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.user-name-input-container{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 4px 6px #0000001a;min-width:300px;max-width:400px}.user-name-input-container h2{margin:0 0 .5rem;font-size:1.5rem;color:#333}.user-name-input-description{margin:0 0 1.5rem;color:#666;font-size:.9rem}.user-name-input-field{width:100%;padding:.75rem;font-size:1rem;border:1px solid #ddd;border-radius:4px;box-sizing:border-box;margin-bottom:.5rem}.user-name-input-field:focus{outline:none;border-color:#4a90e2}.user-name-input-error{color:#e74c3c;font-size:.875rem;margin:0 0 1rem}.user-name-input-button{width:100%;padding:.75rem;font-size:1rem;background-color:#4a90e2;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .2s}.user-name-input-button:hover{background-color:#357abd}.user-name-input-button:active{background-color:#2a5f8f}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5;color:#333}#root{min-height:100vh}