#loading_gif_wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 20;
    background-color: rgb(255, 255, 255, 0.85);
    visibility: hidden;
}

#loading_gif {
    margin-left: 50%;
    margin-top: 200px;
}

#loading_gif_periodic_table {
    margin-left: 50%;
    margin-top: 350px;
    margin-bottom: 575px;
}

.control_label {
    font-weight: bold;
    margin-bottom: 3px;
    max-width: 300px;
}