Element button pseudo-element :before generated with position static margin 0px transition z-index auto background float none width 45px border 0px rgba(0,0,0,1) solid cursor default display block padding 5px overflow hidden font-weight normal text-shadow transform border-radius font-size 40px height 45px box-sizing content-box line-height 1 box-shadow -2px 2px 1px rgba(255,255,255,0.5)