Hi!
Here is a simple solution! You can install a plugin that will enable you to have a place to put your Custom CSS!!
Under plugins(also on left hand side)…click”add new”. On that next page on the upper right you will see a search bar. Put in SIMPLE CUSTOM CSS . Just click “install now”, then “activate” on the next page.
Now when you go back to your dashboard….under “Appearances” you will see “Custom CSS” This is where you can paste that code…as well as put any other CSS changes that you make to your site. Then if you theme updates you wont lose those changes!
Hope that helps..please let me know if I can help you more!
Brenda