Element block pseudo-element :before generated with padding 20px background transition display block font-size 16px opacity 1 line-height 1 width 160px box-shadow 1px 1px 1px rgba(0,0,0,0.3) border-radius margin 0px transform border 0px rgba(0,0,0,1) solid outline none position static cursor default font-weight normal float none overflow hidden z-index auto height auto box-sizing content-box text-shadow 1px 1px 1px rgba(0,0,0,0.2)