a.length ? 'flex' : 'none';
            
            // Ë∞ÉÊï¥ÊØè‰∏™È°πÁõÆÁöÑÂÆΩÂ∫¶‰ª•ÂÖÖÊª°ÂÆπÂô®
            const containerWidth = container.offsetWidth;
            const totalGap = (visibleItems - 1) * 12; // ‰ΩøÁî®Êõ¥Â§ßÁöÑÈó¥Ë∑ù
            const itemWidth = (containerWidth - totalGap) / visibleItems;
            
            for (let i = 0; i < visibleItems; i++) {
                const index = currentDayIndex + i;
             