This dark-themed scatterplot visualizes the relationship between horsepower, top speed, and engine size for a dataset of vehicles, with categorical coloring. The chart uses D3 v7's `d3.csv` loader and `d3.extent`, `d3.mean`, and `d3.median` for data summaries, displaying statistical calculations in a formatted summary box. All marks are rendered as SVG elements within a single `svg` group, using quantitative axes for horsepower and top speed while encoding engine size through point size and category through color.