Create a combined chart of stacked bar and line graph for bakery retail sales with a soft low-saturation & fresh color palette in muted, gentle tones. X-axis: Top 8 product categories (by total sales volume). Primary Y-axis (for stacked bars): Sales count, stack bars by Day Type (Weekday/Weekend) with clear, legible segment labels. Secondary Y-axis (for line graph): the sales gap value between weekday and weekend for each category. Prominently highlight the category with the largest sales gap between weekday and weekend with a subtle yet distinct visual emphasis that aligns with the fresh low-saturation style.