body {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    height: 100vh;
    justify-content: center;
    background-color: black;
    overflow: hidden;
  }
  
  .image-container {
    position: relative;
    width: 200px;
    height: 200px;
    transform-style: preserve-3d;
    transform: perspective(1000px) rotateY(0deg);
    transition: transform 0.7s;
  }
  
  .image-container span {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    transform: rotateY(calc(var(--i) * 45deg)) translateZ(400px);
  }
  
  .image-container span img {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
  }
  
  .btn-container {
    position: relative;
    width: 80%;
  }
  
  .btn {
    position: absolute;
    bottom: -80px;
    background-color: slateblue;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
  }
  
  .btn:hover {
    filter: brightness(1.5);
  }
  
  #prev {
    left: 20%;
  }
  
  #next {
    right: 20%;
  }