Responsive page using css flexbox

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

I was finally able to get my hands on centering the elements in css and that wasn't easy.

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

This was to change the image for each screen size. I must admit that I struggled a lot to get there. At the end I used the content property of the div.

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

I would like to learn how to use the grid and flexbox more efficiently and gain experience. And then I want to learn more about centering elements in css.