Hey there!

So I'm redoing some of my CSS as I've gotten a little sick of it and I'm just cleaning things up a bit. If you look at my page, you'll see I've replaced all of my den images, including on my main account. My problem is, the pregnant lionesses image isn't responding to any code.
Here's the code I'm using to change the image:

>div.cave-grid>img {
content: url('https://imgur.com/1XpsUge.*png')!important;
}

Is there something broken here by chance? Or any other tricks I can use to replace the pregnant lionesses image?

Thanks!