* { box-sizing: border-box; }

 

.dd {
 
  margin: 0;
  display: flex;
  min-width: 80%;
  perspective: 1000px;
  font: 1em/1.4 "Poppins", sans-serif;
  overflow: hidden;
  color: hsl(180 68% 5%);
  padding-bottom: 50px;
  padding-top: 50px;
}

.book {
  position: relative;
  display: flex;
  margin: auto;
  width: 30%;
 
  pointer-events: none;
  transform-style: preserve-3d;
  transition: translate 1s;
  translate: calc(min(var(--c), 1) * 50%) 0%;
 
  rotate: 1 0 0 30deg;
}

.page {
 
  --thickness: 4;
  flex: none;
  display: flex;
  width: 100%;
 
 
  
  pointer-events: all;
  user-select: none;
  transform-style: preserve-3d;
  transform-origin: left center;
  transition:
    transform 1s,
    rotate 1s ease-in calc((min(var(--i), var(--c)) - max(var(--i), var(--c))) * 50ms);
  translate: calc(var(--i) * -100%) 0px 0px;
  transform: translateZ( calc((var(--c) - var(--i) - 0.5) * calc(var(--thickness) * .23cqmin)));
  rotate: 0 1 0 calc(clamp(0, var(--c) - var(--i), 1) * -180deg);
 
   
 
}

.front,
.back {
  position: relative;
  flex: none;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  overflow: hidden;
  background-color: #fff;
 
  translate: 0px;
}

.back {
  translate: -100% 0;
  rotate: 0 1 0 180deg;
}


 /* inside */

.book {
  counter-reset: page -1;
  & a {
    color: inherit;
  }
}

.page {
  box-shadow: 0em .5em 1em -.2em #00000020;
}

.front,
.back {
  display: flex;
  flex-flow: column wrap;
  justify-content: space-between;
  padding: 2em;
  border: 1px solid #0002;
  
  &:has(img) {
    padding: 0;
  }
  
  & img {
    width: 100%;
    height: 100%;
     
 
  }
  
  &::after {
    position: absolute;
    bottom: 1em;
    counter-increment: page;
    content: counter(page) ".";
    font-size: 0.8em;
  }
}
 

.cover {
    background: url("img/cover.webp") no-repeat center;
    background-size: contain;
  }