Rock Paper Scissors using Sass and Vanilla Javascript

Questions About My Javascript Code

 1. Is there any way to reduce the amount of variables used while keeping my Javascript clean?

 2. How can I refactor my code? I sort of tried to refactor it but I think its pretty bad.

Questions About My CSS

 1. How can I optimize my CSS?

 2. Ways to quickly remove redundant lines?

Also please tell me if there's anything I can improve on :)