.control.overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: rgba(0, 0, 0, .1);
    z-index: 999999;
}

.control.overlay .holder {
    background: #fcfcfc;
    box-shadow: 1px 1px 3px rgba(0,0,0,.25);
    position: fixed;
    display: flex;
    flex-direction: column;
    justify-content: stretch;
}