How to remove blank white space when visit Wordpress Responsive site on iPad

Question

I have one problem with website I am working on. Demo link is:

http://saneldesign.com/gdpremium/

Using Argo responsive wp theme. Everything is ok, but on iPad there is strange white space on right side, how to remove this?

Thank you for any ideas!

REVISION

iPad screens :

Answer 1

Try to change the meta viewport.

Exchange with this:

<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">