Element block pseudo-class :active generated with padding 20px box-shadow 1px 1px 1px rgba(0,0,0,0.3) margin 0px box-sizing content-box font-size 21px line-height 1 z-index auto width 100% height auto overflow hidden transition font-weight normal border 0px rgba(0,0,0,1) solid position static cursor default text-shadow float none display block border-radius transform background