This pie chart visualizes sales distribution by product category, using a categorical color scale to differentiate segments and displaying numeric values directly inside each slice. It loads CSV data from a GitHub Gist, converts the values to numbers, and renders the chart with d3.pie, d3.arc, and d3.scaleOrdinal. A custom legend built with SVG rectangles and text identifies each category, while positional labels for "Product Categories" and "Sales Value" reinforce the chart’s context. The visualization uses D3 v7 with an SVG-based rendering approach.