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