/* كتاب السواعي: صفحة واحدة في كل المقاسات. */
.book { display: block; max-width: 720px; margin-right: auto; margin-left: auto; touch-action: pan-y; }
.book .page { min-height: 545px; border-radius: 10px; will-change: transform, opacity; }
.book #right-page { display: none; }
.book.dragging .page { transform: translateX(var(--drag-shift)); opacity: .92; transition: none; }
.book.turn-next .page { animation: leaf-next .34s cubic-bezier(.2,.78,.2,1); transform-origin: right center; }
.book.turn-prev .page { animation: leaf-prev .34s cubic-bezier(.2,.78,.2,1); transform-origin: left center; }
@keyframes leaf-next { from { opacity: .25; transform: translateX(54px) rotateY(-8deg); } to { opacity: 1; transform: translateX(0) rotateY(0); } }
@keyframes leaf-prev { from { opacity: .25; transform: translateX(-54px) rotateY(8deg); } to { opacity: 1; transform: translateX(0) rotateY(0); } }
@media (prefers-reduced-motion: reduce) { .book.turn-next .page, .book.turn-prev .page { animation: none; } }