This example visualizes the religious demographics of countries using a Vega-Lite API specification, encoding country and religion on the axes with point size mapped to population. The visualization uses a line mark to display the data, which is loaded from a CSV file via d3.csv, and renders as an SVG through the integrated Vega, Vega-Lite, and Vega-Lite API libraries. A custom configuration adjusts axis styling and tooltip appearance for readability, with the visualization fitting to the full window dimensions.