.book-perspective{perspective:2200px;isolation:isolate}.book-preserve-3d{transform-style:preserve-3d;-webkit-transform-style:preserve-3d}.book-backface-hidden{backface-visibility:hidden}.book-layer{will-change:transform;transform:translateZ(.1px)}.book-front-face{transform:rotateY(0)translateZ(.5px)}.book-back-face{transform:rotateY(180deg)translateZ(.5px)}.page-paper{background:radial-gradient(at 20% 80%,#00000003 0%,#0000 50%),radial-gradient(at 80% 20%,#00000003 0%,#0000 50%),radial-gradient(#00000002 0%,#0000 70%),linear-gradient(175deg,#fefdfb 0%,#f9f6f0 100%)}.turn-shadow{pointer-events:none;opacity:var(--shade-intensity,0);background:linear-gradient(90deg,#00000059 0%,#00000014 40%,#0000 100%);position:absolute;inset:0}.turn-highlight{pointer-events:none;opacity:var(--shade-intensity,0);background:linear-gradient(270deg,#0000 0%,#ffffff38 15%,#0000 50%);position:absolute;inset:0}.curve-layer-1{pointer-events:none;opacity:var(--shade-intensity,0);background:linear-gradient(90deg,#0000 0%,#0000000f 70%,#00000024 100%);position:absolute;inset:0}.curve-layer-2{pointer-events:none;opacity:var(--shade-intensity,0);background:linear-gradient(270deg,#0000 0%,#0000000a 60%,#0000001a 100%);border-radius:0 4px 4px 0;position:absolute;inset:0}.book-turn-page{z-index:20;contain:layout}.book-spine{z-index:30;background:linear-gradient(#0000001a 0%,#0000002e 30% 70%,#0000001a 100%);width:4px;position:absolute;top:0;bottom:0;left:50%;transform:translate(-50%);box-shadow:-2px 0 4px #0000000f,2px 0 4px #0000000f}@media (prefers-reduced-motion:reduce){.book-preserve-3d{transform-style:flat!important}}