Element block pseudo-element :after generated with background transition box-sizing content-box border 0px rgba(0,0,0,1) solid text-shadow 1px 1px 1px rgba(0,0,0,0.2) line-height 1 float none width 160px display block height auto z-index auto padding 20px font-size 16px font-weight normal margin 0px position static overflow hidden cursor default box-shadow 1px 1px 1px rgba(0,0,0,0.3) border-radius transform