Element block pseudo-element :before generated with padding 20px outline none font-size 16px border-radius box-shadow 1px 1px 1px rgba(0,0,0,0.3) position absolute font-weight normal cursor default box-sizing content-box transform transition z-index auto float none overflow hidden width 250px border 0px rgba(0,0,0,1) solid background line-height 1 height auto margin -2px display block opacity 1 text-shadow 1px 1px 1px rgba(0,0,0,0.2)