.overlay-container {
    position: fixed;
    z-index: 1000;
    pointer-events: none;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
}
.overlay-pane {
    position: absolute;
    pointer-events: auto;
    .comboPanel {
        position: absolute;
        overflow: auto;
        background: #fff; 
        z-index: 9;
        margin-top: -1px;
        box-shadow: 0 2px 8px 0 rgba(0,0,0,0.15);
        border-radius: 2px;
        combo2-list {
            position: absolute;
            width: 100%;
            height: 100%;
        }
    }
}