Shapes with SVG and CSS
This example demonstrates how SVG shapes—circles, rectangles, lines, and paths—can be styled directly with CSS properties such as `fill`, `stroke`, and `stroke-width`. It shows the contrast between shapes with default black fills, individually assigned colors, and a group inheriting a blue fill with a black stroke. The code uses raw SVG elements and CSS rules, including a `.lines` class for stroke styling and a nested `<g>` transform to reposition shapes. No external libraries are used, relying solely on native SVG and CSS.