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