A hierarchical tree visualization depicts the Noble Eightfold Path’s three divisions: Sīla (red), Samādhi (orange), and Paññā (purple), with eight leaf nodes for its practices. Rendered as an SVG using D3 v7, it applies `d3.tree()` and `d3.hierarchy()` to compute layout, then draws vertical links via `d3.linkVertical` and styled circles with text labels. The root node is green, and branch colors are defined in a static data object mirroring the README.