You could add .uix-nav--line or .uix-nav--separation to the .uix-nav to change style of nav.
.uix-nav--line
.uix-nav--separation
.uix-nav
Add .uix-t-c or .uix-t-r to the .uix-nav to change them to center or right aligned.
.uix-t-c
.uix-t-r
Please reduce the screen to see the effect.