CSS problem with Manifesto theme

Hi, i was able to remove the borders from my homepage, and image borders on my posts. i added this code to archive.
#archive div.cover img { border: none; }

the entire code wasn’t there so it wasn’t the ususal, finding “img” and placing border:none.

Now i am stucked. in my comment section, i still have these annoying and thick borders around my avatar and useragent. i really want to get rid of it pls.. will love any form of help. thanks

here is my site. Homepage

u can view my posts with comments here. comment post.

Thanks alot.