This example demonstrates basic SVG shape rendering and grouping with D3 v7, using static geometric primitives rather than data-driven binds. It shows circles, rectangles, lines, and paths inside nested `<g>` elements, with `transform` attributes for translation and scaling applied to layers. Inline `fill` and `stroke` properties override inherited group styles, while CSS rules in `styles.css` further style path joins and stroke widths. The visualization relies solely on declarative SVG markup within an HTML document, with no JavaScript logic beyond importing the D3 library.