SVG Fundamentals
A minimal HTML page renders a single red circle using inline SVG, demonstrating the fundamental building blocks of SVG in the browser. The code defines an SVG element containing a `<circle>` with explicit `cx`, `cy`, and `r` attributes, showing how vector shapes are positioned and sized on a coordinate system. It relies on raw SVG markup without any styling or scripting, providing a barebones example for understanding SVG syntax. The page uses no external libraries, focusing purely on native web technologies.