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