SVG Fundamentals
This example demonstrates the absolute basics of web page structure, rendering the text "Hello HTML" in large, centered type using a shared CSS class. It serves as a minimal starting point for understanding how HTML, CSS, and JavaScript work together in a single file. The code uses plain HTML elements and a `<style>` block for styling, without any external libraries or data sources. Its purpose is to illustrate the foundational building blocks before introducing more complex visualization tools like React or D3.