body {
            -webkit-tap-highlight-color: transparent;
        }
        ::-webkit-scrollbar { 
            display: none; 
        }
        
        .page-flip-next { animation: flipNext 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards; transform-origin: left center; transform-style: preserve-3d; }
        @keyframes flipNext { 0% { transform: perspective(1200px) rotateY(0deg); } 100% { transform: perspective(1200px) rotateY(-180deg); } }
        
        .page-flip-prev { animation: flipPrev 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards; transform-origin: left center; transform-style: preserve-3d; }
        @keyframes flipPrev { 0% { transform: perspective(1200px) rotateY(-180deg); } 100% { transform: perspective(1200px) rotateY(0deg); } }
        
        .page-front, .page-back { position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
        .page-back { transform: rotateY(180deg); }