HTML Starter
This example shows a minimal HTML page with a centered “Hello HTML!” message styled by CSS, alongside a JavaScript console log. The code includes an empty SVG element created with D3 v7, sized to the browser window using `window.innerWidth` and `window.innerHeight` and appended via `d3.select('body').append('svg')`. It demonstrates a bare-bones setup for combining static HTML markup with D3-based rendering, though it does not yet draw any shapes or data. The example serves as a starting point for adding custom visualizations.