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