A minimal demonstration of getting started with D3 version 7, this example renders a static, full-page text label reading “Hello D3 version 7.” The page loads D3 via a CDN, then uses the `select` and `range` APIs from the d3 module to set the body’s text content. The code calls `select('body')` and chains `.text()` to populate the page, with CSS styling defining the large font size and centered layout. No data or interactive behavior is present; the focus is on the basic setup and rendering flow.