.book-brand img {
    height: 7em;
    width: 100%;
    margin-bottom: 0.5em;
}

@media (prefers-color-scheme: dark) {
    .book-brand img {
        filter: invert(1);
    }
}

.book-footer div {
    text-align: center;
}

.book-footer .bmftr-logo {
    height: 12em;
    margin: 0.5em;
}