Social links page using HTML and CSS

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

I tried using an unordered list to create the social link buttons.

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

I tried mobile-first approach for the first time, it was new for me. I used rem instead of px for all measurements to make it responsive.

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

I don't have any specific doubts. Feel free to suggest improvements or point the flaws in the code or design, so that I can improve myself. :)