.book .book-body  {
    .navigation {
        position: absolute;
        top: 0px;
        bottom: 0px;
        margin: 0;
        max-width: 150px;
        min-width: 90px;

        display: flex;
        justify-content: center;
        align-content: center;
        flex-direction: column;

        font-size: 40px;
        color: rgba(0, 0, 0, 0.2);

        text-align: center;

        .transition(all 350ms ease);

        &:hover {
            text-decoration: none;
            color: rgba(0, 0, 0, 0.6);
        }

        &.navigation-next {
            right: 0px;
        }
        &.navigation-prev {
            left: 0px;
        }
    }

    @media (max-width: @mobileMaxWidth) {
        .navigation {
            position: static;
            top: auto;
            max-width: 50%;
            width: 50%;
            display: inline-block;
            float: left;

            &.navigation-unique {
                max-width: 100%;
                width: 100%;
            }
        }
    }
}
.book.color-theme-1 .book-body  {

}
.book.color-theme-2 .book-body  {
    .navigation {
        color: rgba(255, 255, 255, 0.4);

        &:hover {
            color: rgba(255, 255, 255, 0.9);
        }
    }
}