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