SVG Fundamentals
This example shows a minimal SVG scene consisting of a single circle positioned at coordinates (50, 50) with a radius of 50. The page demonstrates the fundamentals of SVG rendering within an HTML document, combining inline CSS styling for the text message "A demo" with an embedded `<svg>` element. The code directly uses the native SVG `<circle>` tag and standard HTML/CSS, with no JavaScript or external libraries involved. It serves as a bare-bones starting point for understanding how vector graphics integrate with web pages.