This pie chart visualizes total sales by product category, using data from a cleaned sales dataset hosted on GitHub. Built with D3.js v7, it employs `d3.pie` and `d3.arc` to generate the chart segments, with colors assigned via `d3.scaleOrdinal`. The code processes the CSV data with `d3.csv`, groups values using `d3.rollups`, and renders the result as SVG, including a legend and placeholder axis labels.