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