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