.custom-block.block-fancybox {}

.custom-block.block-fancybox a[data-fancybox] { display: block; overflow: hidden; border: 3px solid #b0bc22; }
.custom-block.block-fancybox a[data-fancybox] img { display: block; transition: all ease 0.3s; }

.custom-block.block-fancybox a[data-fancybox]:hover { border-color: #2c3539; }
.custom-block.block-fancybox a[data-fancybox]:hover img { transform: scale(1.125); }