buttons input (sach as add to cart button) on iPad(landscape) are not styled, they appear with the system style instead of the Alfresco one.
Yes in Landscape iPad exceeds the responsive css definitions, so it displays the desktop version, unlike the portrait which uses the 980.css. Its fixed now for all resolutions.
Thank you for pointing that out and I wanna let you know that we are currently working on a solution for that particular issue - supporting larger then 980px width mobile devices like the iPad.
Nop-Templates Support Team