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