This visualization shows the total number of StackOverflow questions per month, broken down by category, using semi-transparent bar marks. The data comes from a CSV summary of 60k StackOverflow questions hosted as a GitHub gist and loaded with `d3.csv`. Built with the `vega-lite-api`, it registers Vega and Vega-Lite, uses a custom config for axis styling, and renders to SVG. Tooltips display question totals via `vega-tooltip`, while bar colors encode the question category.