This example displays a single brown circle centered on a purple-outlined SVG canvas, demonstrating the foundational structure of an HTML page that integrates CSS and inline SVG markup. The circle is drawn directly using the SVG `<circle>` element with explicit `cx`, `cy`, and `r` attributes, and styled through SVG presentation attributes for fill and stroke. No JavaScript or external libraries are involved; the page relies solely on native HTML, CSS for margin and overflow reset, and JavaScript’s capability to render SVG within the browser, fulfilling the bare-minimum setup for a web-based visualization.