#rex-start-of-page:before {
    position: fixed;
    top: 0;
    left: 50%;
    z-index: 10000;
    transform: translate(-50%, 0);
    padding: 5px 20px;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
    box-shadow: 0 0 5px 0 rgba(0,0,0, .4);
    color: #000;
    font-size: 13px;
    font-family: 'Fira Code', 'Menlo', monospace;
    font-weight: 400;
}