ution-count::before {
            content: '[*]: ';
        }
        
        .cell-completed .execution-count::before {
            content: '[';
        }
        
        .cell-completed .execution-count::after {
            content: ']: ';
        }
        
        /* Cell Content Area */
        .cell-content {
            flex: 1;
            min-width: 0;
        }
        
        .cell-toolbar {
            display: flex;
            gap: 4px;
            padding: 4px;
            opacity: 0;
   