This pie chart visualizes the distribution of sales across product categories, with each slice labeled by category name and colored using the D3 category color scheme. Hovering over a slice displays a tooltip showing the category’s percentage of total sales, calculated from the summed values. The chart is built with SVG and uses `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` to generate the arcs and colors, while legends are manually positioned to map categories. Data is loaded from a remote JSON file.