.popup-calendar {
    position: relative;
    width: 100%;
    min-height: 560px;
}

.popup-calendar__frame {
    width: 100%;
    min-height: 560px;
    overflow: hidden;
}

.popup-calendar iframe {
    display: block;
    width: 100%;
    min-height: 560px;
    border: none;
}