How do I exclude images in my auto formatting of PDF links?

I added some CSS to my site to put a font a https://birthdaywishes.onl/ wesome PDF icon in front of every hyperlink that links to a PDF. It looks great, but there are a lot of instances where there are thumbnails images that also link to a PDF and https://elecpay.in/tneb/ it looks dumb having the icon in front of the image. Is there something I can add to my CSS to exclude images that are hyperlinked, or CSS that I could add as a class to hyperlinked images to not have the icon? https://myip.kim/

Here is the CSS I used. The not(img) obviously didn't work.