This example shows a single HTML page that displays a large, centered text message reading “Hello HTML!”. It serves as a minimal demonstration of combining CSS for styling and JavaScript for potential interactivity, though the visible behavior is purely static. The page is built using plain HTML with a `<style>` block that sets the font size and alignment, and the `<body>` contains a `<div>` with the text. No external libraries or frameworks are loaded; it relies solely on native browser rendering. The CSS class `.message` applies a 13em font size and centered alignment to the text.