Responsive Social Links Page w/Media Query, CSS Transitions

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

I really like how the transitions on the buttons worked out.

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

Following the design file to a high level of precision. While I'm happy with how most of it turned out, there are always some imperfections when it comes to sizes.

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

I would like to know if my HTML and CSS is correct and efficient. I would also appreciate tips how to get those little details in sizing/gaps/etc. correctly.