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