@keyframes animate-page{0%{background-color:#1e1e1e;transform:perspective(600px) rotateY(0)}30%{background-color:#050505;transform:perspective(200px) rotateY(-90deg)}60%{background-color:#1e1e1e;transform:perspective(200px) rotateY(-180deg)}to{background-color:#1e1e1e;transform:perspective(200px) rotateY(-180deg)}}.book-loader{border:5px solid #ecf0f1;height:60px;left:calc(50vw - 50px);margin:0 auto;position:fixed;top:calc(50vh - 30px - 3.75em);width:100px}.modal .book-loader{top:calc(50vh - 30px)}.book-loader .page{animation:animate-page 1.2s linear infinite;background:#1e1e1e;border:5px solid #ecf0f1;border-left:none;height:60px;left:50%;margin:0 auto;position:absolute;top:-5px;transform-origin:0 50%;transform-style:preserve-3d;width:50px}.book-loader .page:nth-child(n){animation-delay:.85s}.book-loader .page:nth-child(2n){animation-delay:.7s}.book-loader .page:nth-child(3n){animation-delay:.55s}.book-loader .page:nth-child(4n){animation-delay:.4s}