HELP EDITING HOME PAGE

I'm using Opencart 2.3 and am trying to edit some items on my home page. On the top bar I have "Register or Login" on the left side and "My Account" on the right. I'm trying to: 1) move the "Register or Login" to the right side beside "My Account". 2) I want to enlarge the print of "My Account". I just have basic knowledge of CSS editing and tried to figure out how to edit the changes I want but I can't seem to find them in the Stylesheet.css file. Can anybody help guide me as to what I need to do to make those changes?

A link to your site will help others assist you along with what theme you are using

My website is www.vshopper.ca