Hello?

2 questions please.

1. On mobile, the forum does not use full width, but use about 80% of the full width of mobile. How can I get wpforo use full width of mobile?

2. On PC, I found that I need to edit either one of the below CSS code in php file, but which php file I should edit? Can you tell me the php file name?

3. Regarding the 1st CSS file I realized that the width percentage is not 100%, but 74%+23%=97%. is it correct? shouldn't the sum be 100%?

#wpforo #wpforo-wrap {
   font-size: 13px; width: 100%; margin:0;
}
#wpforo #wpforo-wrap .wpforo-content {
   width: 74%;
}
#wpforo #wpforo-wrap .wpforo-right-sidebar { 
   width: 23%;
}

OR paste below this one (on styles tab)

@media screen and (min-width:900px) {
    #wpforo #wpforo-wrap .wpforo-content {width: 74%;}
    #wpforo #wpforo-wrap .wpforo-right-sidebar{width: 23%;}
}