This example demonstrates the minimal structure needed to render an SVG circle in a web page. It shows a single grey circle centered in a 960×500 viewport, positioned using the SVG `<circle>` element with a radius of 100. The code uses plain HTML and CSS, with the SVG directly embedded in the body and a global margin reset via inline styles. No JavaScript libraries or data sources are involved, making it a bare-bones introduction to SVG rendering within a React-free, static HTML setup.