.book .book-body .page-wrapper .page-inner div.reveal a.btn[data-reveal] {
white-space: normal;
}
.book .book-body .page-wrapper .page-inner div.reveal div.revealable h1:first-child,
.book .book-body .page-wrapper .page-inner div.reveal div.revealable h2:first-child,
.book .book-body .page-wrapper .page-inner div.reveal div.revealable h3:first-child,
.book .book-body .page-wrapper .page-inner div.reveal div.revealable h4:first-child,
.book .book-body .page-wrapper .page-inner div.reveal div.revealable h5:first-child,
.book .book-body .page-wrapper .page-inner div.reveal div.revealable h6:first-child {
margin-top: 0;
}