You're looking to have more of an overhead, hover shadow?
.shadow {
-webkit-box-shadow:0 0 10px rgb(0,0,0);
-moz-box-shadow:0 0 10px rgb(0,0,0);
box-shadow:0 0 10px rgb(0,0,0);
}
You can use it with inset too, makes a really nice 3d look to the edges.