Background image for topbar

Hi !

First, thanks for this useful plugin !

I am working on a new website (local with wamp) and i’m trying to add a background image to the topbar. Is that possible ?

The following code works well on firebug (the picture appears as background of the top bar) but does not work when i put it in my style.css of my child theme.

.woa-top-bar-wrap, .woa-top-bar .block .widget_nav_menu ul li .sub-menu {
background-image: url (“https://img4.hostingpics.net/pics/5934455458757.jpg”);
}
Any ideas ?

Thanks a lot for your answer and have a nice day or evening !