.gwt-PopupPanelGlass {
    background-color: rgb(0, 0, 0);
    height: 100%;
    opacity: 0.7;
    width: 100%;
    z-index: 9;
}

.gwt-PopupPanel {
    border-style: solid;
    border-radius: 10px;
    border-color: #f0f0f0;
    padding: 15px;
    border-width: 3px;
    background: #f0f0f0;
    z-index: 10;
}