 .advanced-panel');
            advancedElements.forEach(element => {
                element.style.display = isAdvanced ? 'block' : 'none';
            });
            
            // Special handling for flex containers
            const advancedFlexElements = document.querySelectorAll('.advanced-mode-only-flex');
            advancedFlexElements.forEach(element => {
                element.style.display = isAdvanced ? 'flex' : 'none';
            });
            
            // Special handling for grid 