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