image box-shadow

Hi
I am trying to apply a particular kind of box-shadow to an image.

When the Box Shadow is applied though the Image – Styling section the shadow is applied directly to the image, which is great. But when I do something similar but using a particular kind of box-shadow I can’t get it to apply to the image, just the column its in.

This is what I have tried:
I have applied a Custom ID Attribute – ‘box’- to the image and put this in Quick CSS
#box {
box-shadow: 10px 25px 50px -12px rgba(0,0,0,0.25);
}
This works but the box shadow works on the column the image is in, not the image itself.

You can see the results in the link below.

How do I target the image itself and not the column container?

many thanks

Peter