Change post title font on Adelle theme?

Hi! I’m newish to working with CSS and I need help changing my post title font. I’d like it to be Quicksand, Helvetica, sans-serif and normal (not italics).

I have Custom CSS Manager installed and tried this:

.entry-title {
 font-family: Quicksand, Helvetica, Arial, sans-serif;
 font-style: normal;
}