NFT preview card component challenge with only HTML5 and CSS3

I normally get stuck in to these challenges with frontend frameworks and/or CSS preprocessors or frameworks. For this challenge I decided to just use pure CSS and HTML, since recently I feel I have really been ignoring basic HTML/CSS principles and I don't want to lose sight of my fundamentals. So... here's a bare-bones project! I coded this up in the latter half of an afternoon and would like to revisit it after getting some feedback on my semantic HTML and CSS styles.

Ultimately, I'm looking for feedback on my HTML semantic (or not!) markup, CSS best practices, that sort of thing.

Many thanks!