This example shows a single large black circle centered on a gray SVG canvas within a minimal HTML page. It demonstrates the fundamental structure of an HTML document combining CSS and JavaScript, though the visible rendering relies solely on inline SVG markup. The code uses no external libraries, instead directly embedding an SVG circle element with fixed coordinates and radius inside an `index.html` file. It serves as a bare-bones starting point for understanding how SVG shapes render within a web page, with no data binding or interaction present.