Css responsivo, html 5, css pure

What are you most proud of, and what would you do differently next time?

I would start by better defining the divs where they would be flexbox or block.

What challenges did you encounter, and how did you overcome them?

I had a bit of difficulty when I used more pseudo classes in the same element, as it was causing conflict, but after research and thinking calmly, I came up with a simple solution, which was to create a specific media query where only within the resolution conditions the pseudo class would be active.

What specific areas of your project would you like help with?

Not in particular, but I'm open to criticism and tips.