.body-shim {
    background-color: rgb(28, 27, 25);
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    z-index: -10;
}

.body-shim-message {

    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 50px;
    border: 1px;
    margin-top: -25px; /* Half the height */
    margin-left: -25px; /* Half the width */
 }