#molecule-background {
  position: absolute;
  left: 0;
  top: 0; }
  
.bubble-background {
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  position: absolute;
  background: #ccc;
  background: -moz-radial-gradient(center, ellipse cover, white 0%, #ccc 100%);
  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, white), color-stop(100%, #ccc));
  background: -webkit-radial-gradient(center, ellipse cover, white 0%, #ccc 100%);
  background: -o-radial-gradient(center, ellipse cover, white 0%, #ccc 100%);
  background: -ms-radial-gradient(center, ellipse cover, white 0%, #ccc 100%);
  background: radial-gradient(ellipse at center, white 0%, #ccc 100%);
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#ccc',GradientType=1 );
  x-index: 5; }