.book-opening__stage{aspect-ratio:1.42;perspective:1800px;filter:drop-shadow(0 34px 45px #173a7847);grid-template-columns:repeat(2,minmax(0,1fr));width:min(86vw,62rem);display:grid;position:relative}.book-opening__page{color:#172033;background-color:#fffdf8;background-image:linear-gradient(90deg,#173a780f,#0000 8%),repeating-linear-gradient(0deg,#0000 0 28px,#2f66d00a 29px);border:1px solid #2f66d01f;flex-direction:column;padding:clamp(1.5rem,4vw,4rem);display:flex}.book-opening__page--left{border-radius:1.3rem 0 0 1.3rem;box-shadow:inset -18px 0 25px -25px #173a787a}.book-opening__page--right{border-radius:0 1.3rem 1.3rem 0;box-shadow:inset 18px 0 25px -25px #173a787a}.book-opening__cover{z-index:2;transform-origin:100%;transform-style:preserve-3d;backface-visibility:hidden;border-radius:.45rem 1rem 1rem .45rem;position:absolute;inset:0 50% 0 0;overflow:hidden;box-shadow:18px 22px 45px #173a7857}.book-opening__cover>div{aspect-ratio:auto;height:100%}@media (width<=640px){.book-opening__stage{aspect-ratio:1.15;width:92vw}.book-opening__page{padding:1.25rem}}