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