Element button pseudo-element :before generated with transition width 154px border 0px rgba(0,0,0,1) solid position relative height 10px margin 0px overflow visible padding 10px line-height 1 border-radius font-weight normal font-size 16px cursor default display block box-shadow 1px 1px 1px rgba(0,0,0,0.3) background text-shadow 1px 1px 1px rgba(0,0,0,0.2) z-index auto float none box-sizing content-box transform