Trying to apply CSS shadow to an image block. Nothing seems to work.

Site URL: https://aurmont.com

Hello,

I'm trying to apply most basic CSS shadow to an image block using the code below:

.sqs-block-image img {
  -webkit-box-shadow: 50px 50px 0px #000;
  -moz-box-shadow: 50px 50px 0px #000;
  box-shadow: 50px 50px 0px #000;
}

But nothing happens. I've tried targeting several different classes, but still no effect.

Your help would be greatly appreciated.

div#block-yui_3_17_2_1_1599027926986_4822>div {
    -webkit-box-shadow: 50px 50px 0px #000;
    -moz-box-shadow: 50px 50px 0px #000;
    box-shadow: 50px 50px 0px #000;
}

Thank you, Tuan!