-moz-box-shadow: inset 3px 3px rgba(0,0,0,0.5);
-webkit-box-shadow: inset 3px 3px rgba(0,0,0,0.5);
box-shadow: inset 3px 3px rgba(0,0,0,0.5);
this makes an inset shadow on the top, and left. I can't figure out to make it on the bottom and the right instead!
Make the position values negative:
-moz-box-shadow: inset -3px -3px rgba(0,0,0,0.5);
-webkit-box-shadow: inset -3px -3px rgba(0,0,0,0.5);
box-shadow: inset -3px -3px rgba(0,0,0,0.5);