Element block pseudo-element :after generated with border-radius display block overflow hidden padding 20px font-weight normal float none background transform margin 0px position static font-size 16px height 18px line-height 1 cursor default box-sizing content-box text-shadow 1px 1px 1px rgba(0,0,0,0.2) border 0px rgba(0,0,0,1) solid box-shadow 1px 1px 1px rgba(0,0,0,0.3) z-index auto width 300px transition