"position: absolute;" shifts left in chrome and fine in firefox

Hi guys, I am also having some issues in css.
I am using carousel on my homepage and a button with "position: absolute;" shifts left in chrome and fine in firefox. If I change the margin to make it fine for chrome , then it moves out of view in in firefox.:(:confused::(

link :-

http://www.avoin-expedora.herokuapp.com

There is no app configured at that hostname.
Perhaps the app owner has renamed it, or you mistyped the URL.