This example demonstrates basic geometric shapes—circles, rectangles, and a line—arranged within an SVG canvas. It shows how SVG elements can be styled directly via attributes like `fill`, `stroke`, and `stroke-width`, and how a grouping element `<g>` applies these styles collectively to its children. The rendering relies on raw SVG markup embedded in an HTML page, with a linked CSS stylesheet controlling page layout and overflow. The code uses core SVG APIs for drawing, without additional JavaScript libraries or data sources.