Checkout Continue Button Placement

I am trying to move the checkout “Continue” button over to the right of the page (as this is the most logical place for it to be). I have added to my custom code .gray.button { float: right; } and this works, but it also moves the gray buttons on the item page (Buy Now, Add to Cart).

What do I need to put before the .gray.button to only affect the checkout continue button placement?

Many thanks in advance,

Jamie