Use different Logo on Homepage

Site URL: https://wellhaus-coaching.squarespace.com/

Hello! I need to use a different logo on the homepage vs. all the other pages.  If you go to the site, you'll see the logo in the upper left corner is black. I need to use a different image on the homepage.  I have uploaded it to Home.> Design> Custom CSS. I copied the code that is generated -- NOTE: it says "syntax error on line 1" but I do not know what is wrong.

I have found 3-5 other answers on this forum to similar questions. They all provided different code snippets (see below for 1 example). NONE of them work. 

Once I get this done, I can go live and call it a day! Any/all help is appreciated.  

<style>
.Header-branding {    
display: block;    
max-width: 100%;    
max-height: 124px;    
content: url("PUTLINKHERE") !important;

/* if logo needs to be centered */
    margin-left: auto;    
    margin-right: auto;
  }
</style>

Hi. Add code to Page Header, not Custom CSS (Hover page on Main Navigation or Not Linked > Click Gear Icon to open Page Header)