#popup-message-close {
    position: static;
    top: 0;
    right: 0;
    display: inline-block;
    width: inherit;
    height: inherit;
    cursor: pointer;
    text-indent: 0;
    background: none;
    font-size: inherit;
}

.modal-content {
    background-image: url('../images/under_construction_bg.png');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center left;
}

@media (min-width: 1200px) {
    .modal-content {
        background-size: contain;
        background-position: center right;
    }
}