Element block pseudo-element :before generated with background transition padding 14px z-index 2 font-size 20px display block border-radius box-sizing content-box opacity 1 margin 2px border 0px rgba(0,0,0,1) solid box-shadow position absolute line-height 1 float none transform height 38px font-weight normal cursor default outline none width 47px text-shadow 1px 1px 1px rgba(0,0,0,0.2) overflow visible