[Solved] Need help with Button CSS Please

Hello! I had previously used some CSS to style the comment submit button (resting and hover) and the Subscribe/Notify button (resting and hover) as I liked. Recently, however, I noticed that the styling was messed up. The site is not live, but could someone help me identify the CSS class (or whatever it's called) for these two buttons (both the resting and hover states)? 

They are both a dark grey in the screenshot (which I hope I attached correctly). If it didn't, here is a link  https://d.pr/i/Eewe35

I previously used .wc_main_comm_form .alt and .wc_main_comm_form .alt:hover and it worked fine. Now it's not. 

Hope that makes some sense and you can help me. Thanks!