Element block pseudo-element :before generated with transition overflow hidden background margin 0px width 100% z-index auto box-sizing content-box padding 10px cursor default border 0px rgba(0,0,0,1) solid border-radius box-shadow 1px 1px 1px rgba(0,0,0,0.3) font-weight normal transform height 0% float none line-height 1 font-size 16px position static text-shadow 1px 1px 1px rgba(0,0,0,0.2) display block