CamelJ0e/html_course ? reverse-engineered prompt

Build me a simple practice website with a few linked pages for an HTML course.

I want a home page, a gallery page, a contact or signup form page, and a thank you page that shows after the form is submitted. Keep it clean, easy to read, and beginner friendly, with basic navigation between the pages so I can click around and see how they connect. The gallery page should show a nice grid of images or placeholders with short captions. The form page should include common fields like name, email, a message, and a submit button. The thank you page should feel like a real confirmation screen after submitting the form.

Make the pages look neat with simple styling, but keep the focus on learning HTML structure. If you need any current browser details or best practices, look them up online.