This example demonstrates fundamental SVG shapes—circles, lines, and paths—rendered in a fixed 960×500 viewport. Overlapping red and green circles illustrate layering, while a navy line and black polyline with fill-none stroke show stroke rendering. A commented-out rect remains inactive. All shapes use raw SVG attributes like `cx`, `r`, `stroke-width`, and path data `d`, without any JavaScript libraries. The presentation relies purely on inline SVG markup within an HTML document.