This example shows a minimal HTML page that displays the text “Hello HTML!” centered on the screen, demonstrating the basic structure of an HTML document with embedded CSS and JavaScript. The page uses a single `<div>` element with a `.message` class, styled through a `<style>` block to control font size and text alignment. The code does not load any external libraries or frameworks, relying entirely on native HTML and CSS for its presentation. It serves as a simple starting point for understanding how HTML, CSS, and JavaScript can be combined in a standalone file.