This example shows a minimal HTML page that loads D3 v5 from a CDN and renders a simple body message. The code defines a basic webpage structure in `index.html` with a linked `styles.css` that hides overflow and applies a sans-serif font style. A `data.csv` file is included with country population figures, though it is not read or visualized in the current code. The page uses D3 via `d3.min.js`, but demonstrates only static HTML rendering without any data-driven charts or interactions.