Virtue Premium support question

Hello,

I am trying to make the logo full width of the entire page, but can’t get it to work.

I’ve snooped around some older posts and tried adding this code to custom css:
.col-md-12>#logo {
min-height: 300px;
}
.headerclass {
background-size: cover !important;
}

But it didn’t change anything.
This is the website im trying to make it work for: http://dreambrilliant.com/?page_id=2&lang=en

I want the DREAMBRILLIANT logo picture to be full width.

All the best,
Mark