Center Header Menu in Empire Theme

[BrandReal]

I've used this code from another post in this great community, but after having added it to my asset/theme.css.liquid, and it worked in my old 1.0 Empire Theme from Pixel Union, but not in my current 2.0 Empire theme:

.site-navigation .navmenu-depth-1{

width: 100%;
text-align: center;
}

[Zworthkey]

Hii, @BrandReal 
Kindly share your store URL so,
I can solve it perfectly.
Thank You.