Element block pseudo-element :after generated with z-index auto box-shadow 1px 0px 2px rgba(0,0,0,0.5) border-radius background overflow hidden transform padding 20px position static transition line-height 1 width 160px box-sizing content-box font-weight normal border 0px rgba(0,0,0,1) solid margin 0px float none height auto font-size 16px cursor default display block text-shadow 1px 1px 1px rgba(0,0,0,0.2)