This example demonstrates a stacked bar chart that visualizes population by country, colored by religion, using data from the UCI Auto MPG dataset via a Gist URL. The visualization is built with the Vega-Lite API, which registers Vega and Vega-Lite libraries to render SVG output. The code uses `vl.markBar()`, `vl.y()`, `vl.x()`, and `vl.color()` to define the chart’s encoding, while D3’s `csv` function fetches the data. An interactive tooltip is enabled through the Vega Tooltip handler, and the chart’s appearance is customized with configuration options for axis styling and font sizes.