This example demonstrates basic SVG shapes—circles and rectangles—arranged in a grid, with styling and grouping applied through SVG attributes and CSS. The markup uses core SVG elements like `<circle>`, `<rect>`, and `<g>` with a `transform` to position a group, while some shapes receive explicit `fill` and `stroke` attributes. The accompanying `styles.css` sets page margins to zero and hides overflow, though no classes from the stylesheet are referenced in the markup. The visualization relies entirely on native SVG and CSS, with no JavaScript libraries.