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