Menu/Header breaking on iPad

Hi,

Thanks for a great theme!

My site is working well off my Laptop, but the menu/header appears to break as the screen is minimised or if using an iPad.

I have noticed that it doesn’t do this on your demo, nor on another site using this theme.

Have I made an error by changing something in my CSS perhaps?

Please find screen shot attached.

Unfortunately, my site is in ‘under construction’ mode – please let me know if I should take it out of this mode for you to access it live.

Thanks for your help!