This example shows a zoomable world map with country boundaries, where hovering over any country highlights it in red. It renders the map as SVG paths using `d3.geoPath` with a `geoNaturalEarth1` projection, and enables pan-and-zoom interaction through `d3.zoom`. Country names come from a TSV file joined to TopoJSON geometry from the world-atlas dataset, while hover styling relies on CSS.