Element block pseudo-element :before generated with border 0px rgba(0,0,0,1) solid float none overflow hidden outline none opacity 1 box-shadow 0px 0px 2px rgba(0,0,0,0.5) text-shadow background display block margin auto font-weight normal box-sizing content-box line-height 1 width 80% z-index auto transform cursor default font-size 16px border-radius height auto position relative transition padding 20px