This example demonstrates basic SVG shape rendering with D3.js and CSS styling. The code draws circles, rectangles, lines, and paths on a dark blue background using D3’s `select` API and hardcoded coordinates. Shapes are grouped with SVG `<g>` elements, with CSS classes controlling stroke and fill properties. D3 v5 loads from a CDN, while the page displays a "Hello VizHub!" message via ES6 module imports. The visualization also includes transparent and colored shapes, with inline attributes like `stroke-width` and `fill` overriding stylesheet rules.