World Countries Tree
This tree diagram shows the hierarchical structure of the world's countries, organized by continent (e.g., Asia) and subregion (e.g., Southern Asia). The visualization uses a horizontal icicle layout built with d3.tree and d3.hierarchy from data.json. Nodes are labeled with country names, and edges are drawn as horizontal links using d3.linkHorizontal. Zooming is enabled through d3.zoom, allowing users to explore the full hierarchy. The SVG output styles paths with a teal stroke and text with a serif font, Playfair Display.