.container {
  position: relative;
  max-width: 95dvw;
  width: 1080px;
  border-radius: 0.75rem;
  box-shadow: 0px 0px 10px 1px var(--light-2);
  margin-bottom: 1rem;
}

.book {
  position: relative;
  width: 50%;
  aspect-ratio: 1 / 1.414;
  transition: transform 0.5s;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.book img {
  width: 100%;
  height: 100%;
  object-fit: cover;

  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  backface-visibility: hidden;
}

.paper {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  perspective: 1500px;
  transform-origin: left;
  z-index: 20;
}

.front,
.back {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  transform-origin: left;
  transition: transform 0.5s;
}

.front {
  z-index: 1;
  backface-visibility: hidden;
}

.back {
  z-index: 0;
}

.front-content,
.back-content {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.back-content {
  transform: rotateY(180deg);
}

/* Paper flip effect */
.flipped .front,
.flipped .back {
  transform: rotateY(-180deg);
}

/* Paper stack order book1 */
#p1 {
  z-index: 11;
}

#p2 {
  z-index: 10;
}

#p3 {
  z-index: 9;
}

#p4 {
  z-index: 8;
}

#p5 {
  z-index: 7;
}

#p6 {
  z-index: 6;
}

#p7 {
  z-index: 5;
}

#p8 {
  z-index: 4;
}

#p9 {
  z-index: 3;
}

#p10 {
  z-index: 2;
}

#p11 {
  z-index: 1;
}

/*Paper stack order book 2*/
#p1-2 {
  z-index: 4;
}

#p2-2 {
  z-index: 3;
}

#p3-2 {
  z-index: 2;
}

#p4-2 {
  z-index: 1;
}

/*Paper stack order book 3*/
#p1-3 {
  z-index: 20;
}
#p2-3 {
  z-index: 19;
}
#p3-3 {
  z-index: 18;
}
#p4-3 {
  z-index: 17;
}
#p5-3 {
  z-index: 16;
}
#p6-3 {
  z-index: 15;
}
#p7-3 {
  z-index: 14;
}
#p8-3 {
  z-index: 13;
}
#p9-3 {
  z-index: 12;
}
#p10-3 {
  z-index: 11;
}
#p11-3 {
  z-index: 10;
}
#p12-3 {
  z-index: 9;
}
#p13-3 {
  z-index: 8;
}
#p14-3 {
  z-index: 7;
}
#p15-3 {
  z-index: 6;
}
#p16-3 {
  z-index: 5;
}
#p17-3 {
  z-index: 4;
}
#p18-3 {
  z-index: 3;
}
#p19-3 {
  z-index: 2;
}
#p20-3 {
  z-index: 1;
}