My first try on HTML and CSS

If this is your first try at html and css then wow!

I think you can just use width and not max-width since the design isn't supposed to shrink.

And the position:relative on the container doesn't seem to add anything.

you did an exceptional job considering this is one of your first challenges. I would suggest some tips, you make use of "semantic html"

• Semantic html; Semtantic html makes your code easier to read for both you, and someone looking at your code. semantic html is basically.

  <article>
   <h2> Title </h2>
   <p> Blah blah </p>
   </article>
  

is better and more redable than just putting everything inside a div. For more info You can check this out or you can check some of my projects out to see it in practice.