michael@0: body {
michael@0:   background-image: url("chrome://global/skin/media/imagedoc-darknoise.png");
michael@0:   margin: 0;
michael@0: }
michael@0: 
michael@0: body > :first-child {
michael@0:   display: block;
michael@0:   position: absolute;
michael@0:   margin: auto;
michael@0:   top: 0;
michael@0:   right: 0;
michael@0:   bottom: 0;
michael@0:   left: 0;
michael@0:   background: hsl(0,0%,90%) url("chrome://global/skin/media/imagedoc-lightnoise.png");
michael@0:   color: #222;
michael@0: }