This example displays a world map using an equirectangular projection, with individual countries colored brown against a blue sphere background. Hovering over a country highlights it in dark orange. The visualization is rendered as SVG using D3 v5, with geographic paths generated by `d3.geoPath` and country boundaries derived from the world-atlas TopoJSON dataset. The `geoEquirectangular` projection defines the map layout, while CSS hover rules handle the interactive highlighting.