This example demonstrates how SVG shapes and colors can be styled with CSS, using circles, rectangles, lines, and a path. It shows inline presentation attributes like `fill` and `stroke` alongside a `<g>` element that applies shared styles, and CSS classes that define stroke properties for line elements. The SVG is scaled with a transform, and the page hides overflow. The code uses raw SVG markup with no JavaScript libraries, relying on CSS for line styling.