This interactive map displays world countries and uses an equal-earth projection to render the globe. Hovering over a country changes its fill color to red, providing immediate visual feedback. The visualization is built with d3.geoPath and d3.geoNaturalEarth1 for map projection, while d3.zoom enables pan and zoom interactions. Country names come from a TSV file matching ISO codes, and geographic boundaries use TopoJSON data transformed via the `feature` function. The SVG output includes a styled sphere background and nation paths.