Element block pseudo-element :before generated with z-index auto font-size 16px padding 20px cursor default float none margin 0px font-weight normal background line-height 1 width 300px position static border 1px rgba(0,0,0,1) solid box-sizing content-box transition transform display block overflow hidden border-radius box-shadow 1px 1px 1px rgba(0,0,0,0.3) height auto text-shadow 0px 0px 1px rgba(0,0,0,0.2)