Product successfully added to your shopping cart pop up box position change

[cnpark70]

I am using version 1.0.6.14 default-bootstrap theme.

When you add to cart a pop up box saying Product successfully added to your shopping cart show up.

Here is the problem, the pop up box shows up too far low so the most of the box is cut off from the bottom.

It becomes worse when you scroll down to add product in 2nd row and below. The pop up box positioned so low that it is completely out of screen.

 

How can I move up the order congratulation box?

My site is http://www.kocamoca.com/en/12-skincare

 

Thank you in advance for help