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