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