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