This example shows basic SVG shapes—circles, rectangles, lines, and a path—styled with CSS and grouped with SVG transforms. The first row uses default black fills, the second introduces explicit fill colors, and the third demonstrates a group-level fill with a black stroke. A fourth group applies a CSS class to style the lines and path with custom stroke width and colors. The rendering uses plain SVG elements in an HTML page, with CSS rules in `styles.css` controlling presentation attributes like stroke, fill, and line joins.