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