Back to Top Button Pushing Over Content

Hi

On my site I have the Back to Top button enabled and it is pushing over the screen content - especially important on mobile devices where content area space is so restricted.

I just added the following CSS but it dis not help.

/* Adjust Back to Top Button */
body .generate-back-to-top, body .generate-back-to-top:visited {
right: 30px;
bottom: 30px;
left: unset;
}

Is there any way to ensure the button floats over the content rather than reserve itself a space on the right or left of the screen?

Thanks
Ian