.tx-flipbook{
    position: relative;
}
/* hide some button manually in flipbook */
.flipbook-menu [data-name='btnBookmark'] {
    display: none;
}

@media screen and (max-width: 480px) {
    .flipbook-menu [data-name='btnAutoplay'] {
        display: none;
    }
    .flipbook-menu [data-name='btnSelect'] {
        display: none;
    }
}