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