Inserting CSS to HTML

Hello all!

I am trying to insert the avatar.css file and the button.css file to the HTML folder and it is not working. The style.css file is working for the style of the letters but the other ones aren’t.

Here the link of the project and also the coding on the HTML

file:///Users/mireia.palmero/Desktop/project%202/project2index.html

thats how I am linking the css style file to the HTML file --> link href=‘style.css’ rel=‘stylesheet’

Please paste in your code so that we can have a look, also the lesson URL