Main navigation font-family, font-size CSS?

Hi there,

I’ve been all up and down, in and out of style.css, copying and modifying the CSS pertaining to the main nav into the Theme Options custom CSS box.

I just want to change the font-size to 12px in the menu, and the family to font-family: ‘Oswald’.

How come this theme is so difficult to change CSS with? Is this not the CSS to alter to change font-family and font-size? Please advise:

.site-nav ul li a{
	color: #595959;
	font-size: 12px !important;
	font-family: 'Oswald'!important;
	}

.site-nav > ul > li a {
	font-size: 12px !important;
	font-family: 'Oswald'!important;
        }

.site-nav > ul > li > a {
	text-transform: capitalize;
	font-size: 12px !important;
	font-family: 'Oswald'!important;
	}