How To Alignment Navigation Bar ?

Hi

I am facing a problem as how to alignment the navigation bar width 1351px so that when it appears on mobile, the site will be at the center.

My code is :

nav { background: url(“http://uendi.com/wp-content/uploads/2013/12/Nav-Menu-Bar-1.png”) no-repeat; border-radius: 0; width: 1351px; height: 46px; margin-left: -176px; }

When I refer to the mobile, it’s float on the left. Later, when I change it to width: 1000px, it’s good to see it float on the center, but I want it to be 1351px, so I add a padding-right: 352px, then again it move to the left.

Anybody can help…

Thanks.