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