This example visualizes the top 10 countries by total medals from the 2020 Summer Olympics dataset. It displays a pie chart with color-coded segments and corresponding medal counts, alongside a legend showing country names, medal values, and color swatches. The visualization uses D3 v7 APIs such as `d3.csv`, `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` with `schemeTableau10`. Data is loaded from a remote CSV file, sorted, and rendered as an SVG with interactive mouseover logging.