Element block pseudo-class :active generated with box-sizing content-box float none padding 20px box-shadow 1px 1px 1px rgba(0,0,0,0.3) line-height 1 background font-size 16px cursor default border 0px rgba(0,0,0,1) solid width 160px margin 0px transition overflow hidden border-radius height auto display block font-weight normal text-shadow 2px 1px 1px rgba(0,0,0,0.2) z-index auto position static transform