Shapes and Colors with SVG and CSS
A static SVG canvas displays a single large yellow circle with a grey outline, centered using explicit width and height attributes. The example demonstrates basic SVG shape creation and CSS styling through a D3.js v5 script that selects the root `svg` element, appends a `circle`, and sets its radius, position, fill, and stroke attributes. The accompanying stylesheet applies a full-bleed layout with no margin or overflow. This minimal composition highlights fundamental vector graphics and presentation techniques in a browser-based visualization.