app/assets/stylesheets/shared/mixins/shadow.sass
=black-shadow
text-shadow: -1px -1px 10px transparent, 1px -1px 10px rgba(0, 0, 0, 0.2), -1px 1px 10px rgba(0, 0, 0, 0.2), 1px 1px 10px rgba(0, 0, 0, 0.2)
=large-shadow($color)
-webkit-box-shadow: 0px 0px 30px 0px $color
-moz-box-shadow: 0px 0px 30px 0px $color
box-shadow: 0px 0px 30px 0px $color