The slogan is not appearing to be "responsive" / fluid when viewed on a smart phone.
It's currently behind a "coming soon", hoping to have it lifted before you look at this. Although, you may be able to help without seeing it. If not, let me know.
The theme recommends only 10 words for the slogan, and I've used 22. Is that the problem? Is there anyway to make the text wrap anyway so that it's responsive?