Element button pseudo-element :after generated with z-index auto display block height 300px position static margin 10px transition width 300px font-size 75px overflow hidden opacity 0.83 font-weight normal border 0px rgba(0,0,0,1) solid background text-shadow -1px -1px 0px rgba(255,255,255,0.2) line-height normal transform cursor default box-sizing content-box float none padding 0px outline none box-shadow 0px 0px 6px rgba(0,0,0,0.5) border-radius