This interactive world map displays country boundaries using an equirectangular projection, rendered as SVG paths. The visualization loads geographic data from a TopoJSON world-atlas file and converts it to GeoJSON features via the `topojson.feature` API. Countries are drawn with `d3.geoPath` and respond to hover by changing fill color through CSS. The sphere background uses a blue fill, while countries appear in dark green with black strokes, creating clear visual separation between landmasses and ocean.