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