.mc-modal-background {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.25);
    z-index: 100;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mc-gallery-viewer {
    position: relative;
    background-color: white;
    width: 50vw;
    height: 35vw;
}

    .mc-gallery-viewer .navigation-control {
        position: absolute;
        z-index: 1;
        margin: 0 10px;
        height: 100%;
        display: flex;
        align-items: center;
    }

    .mc-gallery-viewer .left-control {
        left: 0;
    }

    .mc-gallery-viewer .right-control {
        right: 0;
    }

.image-holder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
    .image-holder img {
        max-width: 100%;
        max-height: 100%;
    }