Element block pseudo-class :active generated with box-shadow -4px 0px 1px rgba(0,0,0,0.3) box-sizing content-box line-height 1 outline none border 0px rgba(0,0,0,1) solid display block padding 20px opacity 1 position static margin 0px width 160px text-shadow 1px 1px 1px rgba(0,0,0,0.2) cursor default font-size 16px transition font-weight normal background overflow hidden float none border-radius height auto z-index auto transform