Element block pseudo-class :active generated with margin 0px background padding 20px z-index auto border 51px rgba(0,0,0,1) solid transform border-radius line-height 1 width 160px float none box-sizing content-box box-shadow 1px 1px 1px rgba(0,0,0,0.3) height auto font-weight normal text-shadow 1px 1px 1px rgba(0,0,0,0.2) cursor default font-size 16px transition position static overflow hidden display block