This example demonstrates basic geometric shapes—circles, rectangles, lines, and a path—rendered within a single SVG element. It shows how inline presentation attributes coexist with external CSS rules, where the `.lines` class applies stroke styling to grouped elements while individual shapes use inline `fill` and `stroke` values. The SVG uses transform groups to scale, translate, and reposition shapes, with colors and stroke widths controlling visual hierarchy. The page is a plain HTML file with a linked stylesheet, using no JavaScript libraries, relying purely on SVG’s declarative markup and CSS for styling.