This interactive stacked bar chart visualizes the population distribution across religious affiliations for 20 countries, sourced from a CSV file. Users can hover over either the legend or the stacked bars to highlight a specific religion, with non-matching segments fading to low opacity. The visualization uses D3's `scaleOrdinal` for colors, `stack()` for creating the stacked segments, and `scaleBand` for the categorical country axis. A custom `colorLegend` module handles the interactive hover states, while `@curran/responsive-axes` manages the axes and labels.