html.access-pending body > * {
    visibility: hidden;
}

html.access-pending body::before {
    content: 'Checking access...';
    visibility: visible;
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    color: #333;
    font: 700 1.1rem Nunito, sans-serif;
}