How to fix horizontal scrolling?

Hi all,

I have an div wider than the screen size (I need it to trigger a mouse motion move), this is causing the horizontal scrolling.
I tried setting “Overflow hidden” to the Body, bu then I loose also the page vertical scrolling.

Is there a way to make “Overflow hidden” just for horizontal?

Here is my “Read only” link, please see second page called "Doopels app"

This is the published site:

Hey Eli,

Applying overflow: hidden to the body will always prevent any time scrolling. Instead, apply it to the section called port content.