This example visualizes the Auto MPG dataset from the UCI Machine Learning Repository, plotting each car’s fuel efficiency (mpg) against its horsepower. Circles are colored by country of origin and sized by vehicle weight, with tooltips revealing the car model name. The visualization is built using the Vega-Lite API, which wraps d3.csv for data loading and vega-tooltip for interactive hover details. The plot dynamically fits the full viewport width and height, while custom axis and label styling are defined in a separate config file to improve readability.