@dealtek
dont edit the core files or you will lose them the next time you update bbPress.
please follow this guide instead
https://codex.bbpress.org/theme-compatibility/
and please create a child theme as the guide says to , because it will make customizing bbPress alot easier. you can edit all the bbPress templates that you have copied to your child theme safely if you go to appearance>editor and choose your child theme and find the bbPress templates/css, you can also use FTP and a advanced text editor like notepad++ to edit files on your cpu.
here is more information on child themes
Functions files and child themes – explained !
the left margin CSS for bbPress threaded replies is
#bbpress-forums ul.bbp-threaded-replies {
margin-left: 50px;
}
to make it smaller for a small device use something like this.
put it anywhere you can put custom CSS
or if you copied the CSS file into a folder called bbpress into your child theme , you can add it below
/*--------------------------------------------------------------
Media Queries
--------------------------------------------------------------*/
/* =Standard Mobile Landscape
-------------------------------------------------------------- */
@media only screen and (max-width: 480px) {
@media only screen and (max-width: 480px) {
#bbpress-forums ul.bbp-threaded-replies {
margin-left: 20px;
}
}
you can remove the reply author image too if you want
@media only screen and (max-width: 480px) {
#bbpress-forums div.bbp-reply-author a.bbp-author-avatar,
#bbpress-forums div.bbp-topic-author a.bbp-author-avatar {
display: none;
}
}