Custom Social icons and hover

Site URL: https://raccoon-oarfish-szer.squarespace.com/

I'm using the following code for custom social icons in the header:

.header-menu-actions-action:nth-of-type(2) {    
  svg {
    display:none;    
  }    
  background-image: url(https:.....png);    
  background-size: 100%;    
  background-repeat: no-repeat;  
}

That all works fine, but I can't figure out how to create a hover style for the icons I've uploaded. I'm thinking I could upload a different color .png file for hover, but all my attempts at figuring out how/where to add a:hover anywhere does not work when attempting additional code. All my searches have found how to add the above snippet, but nothing about hover.

pwd: Largeosity

Use some code like this for hover icon

.icon--fill:nth-of-type(3):hover {
    background-image: url(https://cdn.pixabay.com/photo/2022/06/13/19/43/man-7260571__480.jpg);
}

Wow, I wasn't even close.

Thanks a lot!