FluidApp: I only have one app store button, how do I center it?

If you are only using a single app store button and would like to center it on mobile devices you add this bit of code:

Go to your WP admin panel > FluidApp > Style Option tab and paste this in the Custom CSS box

/* For iPhones and Mobile */
@media only screen and (max-width:750px) {

section #app_info .buttons .large_button {
float: none !important;