/* css menu workchat */
.container_menu {
    display: inline-block; 
    position: relative; 
    width: 100%;
}

.container_menu .iframe_menu {
    position: absolute; 
    top: 0; 
    bottom: 0; 
    left: 0; 
    right: 0; 
    width: 100%; 
    height: 90vh; 
    overflow: hidden;
}