div.morphoViewerSpinner {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    font: inherit;
    font-size: 2em;
    font-weight: normal;
    display: grid;
    place-items: center;
    color: #fff;
    background-color: #000;

    >div {
        margin: 0;
        padding: 0;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        display: grid;
        place-items: center;
        text-align: center;
    }

    >svg {
        font-size: 600%;
    }
}