Basic HTML/CSS Personal Homepage

I need a straightforward personal site built with clean, semantic HTML5 and lightweight CSS3. The scope is intentionally minimal: a single Home page that presents an Introduction section about me. No extra pages, frameworks, or scripts—just well-structured markup and tidy styles.

Please deliver:
• index.html featuring the Introduction content
• styles.css for layout, typography, and basic responsiveness
• Any asset folders (images, fonts) if used

Code should be easy to read, commented where helpful, and ready for me to expand later.