css with flexbox

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

I have learned how to center all in the page. I'm not happy how I see the results on phone, I need to focus on that next time.

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

All need to be centered and I use flexbox for that.

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

I would like to better understand measurement units. I have used px and % for some blocks; maybe I should use a relative unit instead.