Social site likes with CSS and HTML

Hello to everyone!

Here I present you my solution for the presented challenge! I'm really glad that I finished it and I'm waiting for suggestions or comments that can rise my level of understanding about CSS or HTML.

As being my second challenge, I encountered some difficulties, maybe a bit naives like forgetting to link HTML to CSS or trying to remember functions instead of searching them.

If you would need to improve this solution, what would you do? Thank you so much in advance!