Tried to add colour behind image stack with code now footer has gone missing

Site URL: https://crackenback-clinic.squarespace.com

Hi I was using code to colour boxes in the image stack and now my footer has disappeared on the home page and the top section of the home page has resized and I cannot access the styles to reformat it. Password is: crackenbackclinic

All good, I managed to fix it. I took out all the backgrounds and boxes and code. 

Code for reference:

// IMAGE STACK BLOCK BACKGROUND //
.image-block-outer-wrapper.image-block-v2.design-layout-stack {background:#fbf7f4;}
.image-card.sqs-dynamic-text-container {padding:30px;}