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