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