This example renders a static, stylized face in an SVG canvas using D3.js v5. The code sets the SVG dimensions to match the full browser window, then appends a single rounded rectangle as the facial background via the `select` and `append` APIs. It imports `arc` from D3, though no path drawing is executed in the visible script. The visual output is a simple, empty rounded rectangle, with styling handled by an external `styles.css` that fixes the body to the viewport.