This example demonstrates basic SVG shapes and CSS styling. It shows circles, rectangles, lines, and a path, with some shapes using default black fill while others specify fill colors like red and green. A transformed group applies a light blue fill and black stroke with a thicker stroke-width on the circle. The CSS file styles the line and path elements with custom stroke colors and line joins. The SVG markup uses inline attributes, the `<g>` element for grouping, and CSS classes to control presentation.