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