This example displays a world map with countries rendered in pink against a green ocean, highlighting each nation with a white border. When hovered over, individual countries turn yellow. The visualization uses D3 v5 and TopoJSON to load country boundaries from a world-atlas GeoJSON dataset, projecting them with d3.geoEquirectangular and drawing the paths as SVG elements. The map's background sphere and country outlines are styled using simple CSS rules.