I was trying to apply some solutions specified for a kind of similar problems, but it did not work for me, so I decided to post my question here.
My page has a Kendo.Window() that generates an html:
I'm trying to set border-radiusstyles to div .k-widget .k-window element the following way:
div < .customTitle{
    border-radius:6px;
} 
or
div .k-window < div .customTitle{
    border-radius:6px;
}
But that does not work for me.
How can I do something like that?

 
    