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