This example shows a single black circular outline with a thick stroke, centered on a 900-by-400 SVG canvas. The circle is drawn directly in the markup using the SVG `<circle>` element with `cx`, `cy`, `r`, and a `stroke-width` of 40 pixels, while the page’s CSS sets a large font size for a hidden message class. The rendering relies on plain SVG and inline styling, with no additional JavaScript or external libraries beyond the HTML and CSS defined in the file.