Sidebar Width Adjustment | Free Virtue Theme 2.4.7

I have read your forums and can’t seam to get my adjustment of the FREE Virtue Theme 2.4.7 to work. I need to make my sidebar width equal 300px.

I found your suggestion code of:

(min-width: 1200px){
.main {width:870px;}
aside.span4 {width:270px;}
.kad-header-left {width:270px;}
.kad-header-right {width:870px;}
}

————————————-

And:

(min-width: 1200px) {
#content .main.col-lg-9 {width: 66.66%;}
#content aside.col-lg-3 {width: 33.33%;}
}

————————————–

BUT neither of these seam to work for me?
Perhaps I’m doing something wrong.

I’ve been placing the code in the theme options >> advanced settings >> custom CSS box.

I’m trying to get the Facebook Page Plugin to work correctly, which now requires a minimum of 280px in width.