This visualization displays an application hierarchy as a vertical tree, showing how apps branch into functions and further into services. The layout is generated using D3’s `tree` and `hierarchy` functions, with curved links drawn via `linkVertical`. The SVG renders text labels sized inversely to node depth, and the entire graphic supports pan-and-zoom through D3’s `zoom` behavior. Data is loaded from a JSON file, and styling uses the Playfair Display font with a teal stroke for paths.