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