This example shows a single, unstyled circle centered in an SVG canvas, demonstrating the minimal structure needed to render a shape in a web page. The page relies on plain HTML and inline SVG, with no external libraries or JavaScript. The circle has a radius of 300 pixels and no fill or stroke, making it invisible against the white background. The SVG element is set to 900 by 500 pixels, and the body uses inline CSS to remove margins and hide overflow, ensuring the graphic fills the viewport without scrollbars.