Fork of World Countries Tree
This visualization displays a hierarchical tree of world countries organized by continent and subregion, using a left-to-right layout with horizontal links. Built with D3 v5, it leverages `d3.hierarchy` and `d3.tree` to process the JSON data, while `d3.linkHorizontal` generates the curved paths. The SVG renders country names as text nodes with font size decreasing by depth, and implements `d3.zoom` for panning and scaling. Data comes from a static `data.json` file.