Reply To: bbpress and child theme

Thanks Shmoo for all the help. Unfortunately I don’t know which file to copy so to be safe I’ll copy everything to my child theme.
I’m also trying to remove my main theme’s sidebar for my forum with no success. I’ve read other post and this seems to work:

body.bbPress #sidebar {display:none;}
body.bbPress .post {width:100%;}

I put those on both my bbpress.css and the style.css but it doesn’t seem to work.

This is my website: http://ps4evolution.com/forums/