A responsive page with HTML and CSS only

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

I love BEM naming convention and I would like it improving my class naming skill and writing maintainable CSS code

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

Writing responsive page is a little challenging since I have to consider desktop, tablet and mobile layout, typography and other tiny problems.

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

Reviewing my CSS code for suggestion and improvement would help me :)