This example visualizes the relationship between engine displacement and horsepower for automobile models using the Vega-Lite API, with tooltips displaying car names on hover. It renders a scatter plot with semi-transparent points on a full-screen canvas, configured for a clean dark-on-light aesthetic. The code loads data from a CSV file via D3’s `csv` function, then builds the visualization declaratively with `vl.markPoint` and `vl.x().fieldQ()`, wiring everything together through Vega-Lite and Vega’s runtime, including custom tooltip handling via the `Handler` from `vega-tooltip`.