Element block pseudo-element :before generated with border-radius font-weight normal transition height 300px box-sizing content-box z-index auto cursor default display block width 300px border 0px rgba(0,0,0,1) solid padding 0px box-shadow outline none font-size 16px line-height 1 background float none overflow visible opacity 1 text-shadow 1px 1px 0px rgba(0,0,0,0.25) position static margin 0px transform