.flipbook-page{display:flex;align-items:center;justify-content:center;height:100vh;margin:0;padding:0;position:relative}#btnCompra{position:absolute;top:20px;right:20px;z-index:999999;width:90px;height:90px;background:linear-gradient(135deg,#000,#333);color:#fff;border:3px solid #ffffff33;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;text-align:center;font-weight:600;font-size:12px;line-height:1.2;box-shadow:0 8px 15px rgba(0,0,0,.3);transition:.3s;animation:2s infinite pulse}#btnCompra:hover{background:linear-gradient(135deg,#222,#555);transform:scale(1.05);box-shadow:0 10px 20px rgba(0,0,0,.5);border-color:#666}@keyframes pulse{0%{transform:scale(1);box-shadow:0 0 0 0 rgba(0,0,0,.2)}70%{transform:scale(1.01);box-shadow:0 0 0 5px transparent}100%{transform:scale(1);box-shadow:0 0 0 0 transparent}}@media (max-width:1024px){._df_book{width:95vw;height:95vh}}@media (max-width:768px){._df_book{width:100vw;height:100vh}#btnCompra{width:70px;height:70px;font-size:10px;top:10px;right:10px}}