Element block pseudo-element :before generated with z-index auto height auto float none display block transition font-size 16px box-sizing content-box cursor default position absolute line-height 1 width 100% border-radius transform font-weight normal background border 1px rgba(0,0,0,1) solid margin auto box-shadow 1px 1px 1px rgba(0,0,0,0.3) padding auto text-shadow 1px 1px 1px rgba(0,0,0,0.2) overflow hidden