This example demonstrates how SVG shapes can be styled using CSS, with a blank 960×500 canvas ready for D3.js v5 rendering. The page loads the D3 library and logs it to the console, confirming its availability, while the stylesheet resets the body margin to create a full-bleed display. Although no data or shapes are yet drawn, the setup illustrates the foundational integration of D3 with SVG elements and external CSS for visual customization.