This world map shows country boundaries and graticules, with landmasses in teal and interiors in a contrasting stroke. Built with React and D3 v5, it uses `d3.geoNaturalEarth1` for projection and `d3.geoPath` to render both country shapes and the graticule grid. The map is drawn as an SVG that resizes with the browser window, and data comes from the World Atlas TopoJSON, processed with `topojson` feature and mesh functions.