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