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