Element block pseudo-class :active generated with position static transform background text-shadow box-sizing content-box font-size 2em font-weight normal height auto opacity 1 line-height 1 display block padding 20px border 3px rgba(132,0,0,1) solid outline none width 50% z-index auto cursor default border-radius overflow hidden float none transition box-shadow 1px 1px 1px rgba(0,0,0,0.3) margin auto