/* 
  Carousel by Prahalad S
  https://dev.to/prahalad/3d-infinite-carouselcoverflow-slider-in-pure-css-with-reflection-4i9b
*/
:root {
  --num: 8;
  --wd: 130;
}
section {
  width: clamp(480px, 80%, 90vw);
  margin: 0 auto;
}
.carousel {
  display: flex;
  align-items: flex-start;
  height: 100vh;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 5% 95%, transparent); 
}
.carousel .gallery {
  list-style-type: none;
  display: flex;
  align-items: center;
  width: 100%;
  height: 450px;
  position: relative;
  perspective: 40em; 
}
.carousel .gallery .card {
  width: 130px;
  height: auto;
  position: absolute;
  transform-style: preserve-3d;
  left: 100%;
  animation: slide 30s linear infinite, scaleEffect 30s ease-in-out infinite;
  animation-delay: calc(30s * ((var(--timer) - 1) / var(--num) - 1));
  transition: transform 0.25s ease-in-out;
}
.carousel .gallery .card img {
  width: 100%;
  border-radius: 5px;
  box-shadow: 0px 0px 16px #cecece;
  /* images reflection */
  -webkit-box-reflect: below 0px linear-gradient(to bottom, rgba(0, 0, 0, 0.0), rgba(0, 0, 0, 0.3));
}
@media (prefers-color-scheme: dark) {
  .carousel .gallery .card img {
    box-shadow: 0px 0px 16px #303030;
  }
}      
@keyframes slide {
  from {
    left: 100%;
  }
  to {
    /* Moves the element leftward by --wd pixels, shifting it completely out of view. */
    left: calc(-1 * var(--wd)* 1px); 
  }
} 
@keyframes scaleEffect {
  0%,
  25%,
  75%,
  100% {
    transform: scale(1);
    z-index: 0;
    /* filter: grayscale(1); */
  }
  50% {
    transform: scale(2);
    z-index: 10;
    /* filter: grayscale(0); */
  }
}
@keyframes scaleEffect {
  0%, 25%, 75%, 100% {
    transform: scale(1) rotateY(0deg);
    z-index: 0; 
    /* filter: grayscale(1); */
  }
  35% {
    transform: scale(1.25) rotateY(-45deg);
    z-index: 5;
    /* filter: grayscale(1); */
  }
  50% {
    transform: scale(2) rotateY(0deg);
    z-index: 10;
    /* filter: grayscale(0); */
  }
  65% {
    transform: scale(1.25) rotateY(45deg);
    z-index: 5;
    /* filter: grayscale(1); */
  }    
}
@media only screen and (max-width: 600px) {
  section {
    width: clamp(400px, 80%, 90vw);
  }
}