.page-sheet{position:relative;isolation:isolate;border-radius:2px 5px 5px 2px;box-shadow:2px 3px 0 #f4f1ea,4px 5px 0 #e8e5df,6px 7px 0 #d6d6d3,0 14px 36px #23435230;overflow:visible}
.page-sheet:after{content:'';position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,#20364a22,transparent 3%,transparent 97%,#112e4510);z-index:1}
.book-turn-leaf,.book-turn-under,.book-turn-shadow{position:absolute;inset:0;pointer-events:none}
.book-turn-leaf{z-index:4;transform-style:preserve-3d;will-change:transform}
.book-turn-front,.book-turn-back{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden;border-radius:2px 5px 5px 2px;background:#fffdf8;box-shadow:9px 3px 22px #16334e36}
.book-turn-back{transform:rotateY(180deg);background:linear-gradient(90deg,#ddd9cc,#fffdf8 9%,#f8f5eb 75%,#d3cfc3);border-left:1px solid #b9b5aa}
.book-turn-front:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#183a4d20,transparent 10%,#fff3 65%,#19334d1a);pointer-events:none}
.book-turn-under{z-index:2;background:#fff}.book-turn-shadow{z-index:3;background:linear-gradient(90deg,#15365066,#1536501a 70%,transparent)}
.book-turn-front>img,.book-turn-front>canvas,.book-turn-under>img,.book-turn-under>canvas{display:block;width:100%;height:auto}
.page-stage{perspective:2200px;padding-top:24px;padding-bottom:28px}
@media(prefers-reduced-motion:reduce){.book-turn-leaf,.book-turn-shadow,.book-turn-under{display:none}}
.book-curl-canvas{position:absolute!important;inset:0;z-index:5;display:block;width:100%!important;height:100%!important;pointer-events:none;filter:drop-shadow(0 3px 5px #18344818)}
@media(prefers-reduced-motion:reduce){.book-curl-canvas{display:none}}