html,
body {
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: #2a2c30;
}

#flipbook {
    height: 100%;
}

/* the whole page is the book: no focus frame around the window */
#flipbook:focus-visible {
    box-shadow: none;
}

.jfb-noscript {
    margin: 2em;
    color: #f2f2f2;
    font: 16px/1.4 system-ui, sans-serif;
    text-align: center;
}