div.reiwa-loading{
    position: absolute;
    height: 5em;
    width: 5em;
    /*top: calc(50% - 2.5em);
    left: calc(50% - 2.5em);*/
    top: 50%;
    left: 50%;
    margin-left: -2.5em;
    margin-top: -2.5em;
    border: thin solid black;
    z-index: 10000;
    border-radius: 6px;
    background-color: white;
    padding: 4px;
    opacity: 0.8;
}
.reiwa-loading img{
    width:100%;
    height:100%;
}