[Plugin: Call to Action] CSS centering button

Hi,

I’m trying to get the button in my Call to Action to be centered under all of the other content. No matter how I’ve tried to change the CSS, I just can’t get it centered (or to move at all). I’m sure there must be a very simple solution to this problem, but for the life of me I can’t figure it out.

You can see the call to action on the right hand side of this page: http://www.maddielabstudio.com/blog/. I’m trying to get the button that says “Get Calendar!” centered under the text and image that are right above it.

Thanks!