SVG Fundamentals
This example shows the basic building blocks of SVG, a vector graphics format, through a minimal HTML page. It displays a single red circle positioned within an SVG canvas, demonstrating how shape elements are declared with attributes like `cx`, `cy`, and `r`. The code relies on standard HTML and CSS, using the `<svg>` tag and its child elements directly in the markup without any JavaScript or external libraries. The rendering approach is purely declarative, highlighting how SVG defines visual output through XML-like syntax.