This fork of a choropleth map colors countries by economy category using a spectral ordinal scale, with a legend rendered as circles and text. Built with D3 v5, it loads world geometry from TopoJSON and country metadata from TSV, then projects paths via `d3.geoNaturalEarth1` and `d3.geoPath`. Map panning and zooming use `d3.zoom`, while hover effects highlight countries in red. The legend is created by a custom `colorLegend` module that binds to color scale domains and updates in place.