This example shows a minimal HTML page with a single large circle rendered inside an SVG element. The page is styled with CSS to remove the default body margin and hide overflow. It demonstrates the fundamental structure of an HTML document, including the doctype, head, and body tags. The SVG uses the `width` and `height` attributes to define its viewport, and the circle is drawn using the `r` attribute for its radius. No JavaScript or external libraries are used, making it a bare-bones starting point for web visualization projects.