.gwt-PopupPanel {
  border: 3px solid #C3D9FF;
  padding: 3px;
  background: white;
  z-index: 3;
}

.gwt-PopupPanelGlass {
  background-color: #000;
  opacity: 0.3;
  filter: alpha(opacity=30);
  z-index: 4;
}