hide header and footer on one index page

Site URL: https://www.ladiesdrawingnigh.org

Hi,

I have the Brine- Rally template and am trying to create a landing page with no header or footer.  I've tried many things.  I'd like to do this in the Custom CSS instead of on this index page's settings.  Can someone help with this?  I'd really appreciate it.  Thank you!

Teresa

EDIT:  Am able to hide the footer and the header with this code--don't know why it wouldn't work with footer, header in the same bit of code.  I had to separate it.

body#collection-5eaa0a46b0caa85f5c39b770 
  footer { 
     display: none !important;
     }

body#collection-5eaa0a46b0caa85f5c39b770 
  header { 
     display: none !important;
     }