This example renders a minimal "Hello D3" message on a blank web page. It imports the `select` function from D3 v7 using an import map and JavaScript modules, then uses `select('body').text('Hello D3')` to set the page’s body text directly. The visualization is a simple text output rather than a chart, demonstrating the basic setup for a D3 project without any data or graphical elements. The page styling centers the large text vertically and horizontally.