I believe i have seen the coding set up like this:
div
box-shadow:
0 0 0 black,
1 0 0 black,
0 0 1 black
or try this if the one above does not work
div
box-shadow: 0 0 0 black,
1 0 0 black,
0 0 1 black
I Hope This Helps You.
Also works in the context of media queries. (real world example for retina-enabled sprites). Note the (somewhat odd-looking) indentation of the second background-image.
.sprite
background-image url('/assets/static/sprite.png')
background-repeat no-repeat
background-size 960px 480px;
@media only screen and (-webkit-min-device-pixel-ratio 1.3),
only screen and (-o-min-device-pixel-ratio 13/10),
only screen and (min--moz-device-pixel-ratio 1.3),
only screen and (min-device-pixel-ratio 1.3),
only screen and (min-resolution 120dpi)
background-image url('/assets/static/sprite_x2.png')