Help fixing my (custom CSS) fixed footer from overlapping image area on my site when viewing on mobile phone

Hello SquareSpace Community:

I recently built a SquareSpace site for my video production company: https://www.quillpictures.com/

And I'm having a small layout issue that I'm hoping I can get some help on. When viewing my WORK and SERVICES page on a MOBILE PHONE, my (custom CSS) fixed footer overlaps/hides part of the page. Please see attached photos. As you can see, my fixed footer is cutting off the "Let's Talk" button on the Services page, and the final image (of a race car) on my Work page. 

I was told by a SquareSpace representative that my 7.1 website does not support fixed footers, but that with some custom adjustments to the CSS I can prevent it from overlapping the image area.

Here is the custom CSS that I'm using to create a fixed footer:

#footer-sections {
position: fixed!important;
width: 100%!important;
bottom: 0!important;
z-index: 99!important
}

How do I fix this issue?

Thank you for the help!

Mike

Because you set position: fixed for footer, so you will need to add some spacing to main content. Try adding this to Design > Custom CSS

@media screen and (max-width:767px) {
	article section:last-child {
		padding-bottom: 100px !important;
}
}

You can adjust number 100