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