This example visualizes the relationship between fuel efficiency, acceleration, weight, and country of origin for cars from the UCI Auto MPG dataset. The code constructs a scatter plot using the Vega-Lite API, plotting `mpg` against `acceleration`, with color encoding origin and size encoding weight. It leverages `vl.register` to integrate Vega-Lite, and `vl.markCircle` with `.encode` for the visual marks. Data is loaded asynchronously via `d3.csv`, and the chart is rendered as an SVG, configured with custom axis and label styling.