#sliding-popup {
    position: fixed;
}

.sliding-popup-bottom {
    bottom: 0;
}

.popup-content {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    padding: 10px 20px;
}

.popup-content--text {
    -webkit-box-flex:1;
    -ms-flex:1;
    flex:1
}

@media (max-width: 768px) {
    .popup-content {
        -webkit-box-orient:vertical;
        -webkit-box-direction:normal;
        -ms-flex-direction:column;
        flex-direction:column;
    }
    .popup-content--text {
        margin-bottom: 20px;
    }
}