#loading_msg {
        width: 100%;
        margin-left: auto;
        margin-right: auto;
        margin-top: 1ex;
        margin-bottom: 1ex;
        max-width: 62.5em;
        position: relative;
        padding-left: 1.5em;
        padding-right: 1.5em;
    }
    .hidden {display: none;}