Nav Stacks on Vertical tablet orientation

Hi Again,

This theme is amazing. I have one more question. My client doesn’t like the way the nav stacks when a tablet is orientated vertical. I changed the font size to 12, and it worked when I drag the window on my computer to the size of the tablet, but when I looked on the tablet (ipad) the menu when the orientated visually still stacks. I don’t like the way the nav looks when it is size 12 font either on a computer screen, is there a way to declare when the size is vertical to change the font size so it is all on one line… Site for reference.