Some element I can't style on my BBpress forum

Hey guys,

I'm using gpress premium and bbpress: I've look at the CSS you have on that forum but I'm not able to change the following things:

-> Setting the proper height for the bbp-reply-author element: the width is 200px but the height is blocked at 293.5px and I don't how to change it.
I'd like it to be like on the generatepress forum, so that the grey recovers all the bbp-reply-author but I can't get it to work).

I've sent you the link of a page attached so you can see it.

Thanks for your help.

Marc