This example demonstrates interactive pan and zoom on a world map, with hover highlighting of individual countries. The map is rendered as SVG paths using `d3.geoPath` and a natural Earth projection, with country boundaries from a TopoJSON file enriched by TSV name data. The `d3.zoom` API handles the zoom and pan transformations, while CSS `:hover` styles trigger the red country fill. The sphere background uses a blue fill, and country names appear as tooltips via SVG `<title>` elements.