Huddle landing page attempt 1

Any feedback is welcome, please feel free to suggest anything.

is it ok to use "em" and "rem" values for margin and padding? Or should those values only be used for fonts? because I was using "%" to set some values but was not sure what is best.

I had a lot of difficulty with the social media icons. The borders around them are different sizes for each icon, I can't get them all to look the same.