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