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