This example presents a minimal HTML page that renders a single red circle inside an SVG element. The page sets the body margin to zero and hides overflow, creating a clean canvas for the graphic. The code uses a basic SVG `<circle>` tag with a radius of 200 and a red fill, positioned within a 500-by-1000 pixel viewport. It demonstrates the foundational interplay of HTML structure, inline CSS styling, and the SVG rendering API. The example serves as a starting point for more complex web-based visualizations.