* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: sans-serif;
    background-color: #f7f7f7;
    color: #333;
    text-align: center;
    padding: 2rem;
  }
  
  header {
    margin-bottom: 2rem;
  }
  
  button {
    padding: 1rem 2rem;
    background-color: #008060;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #005e45;
  }
  
  footer {
    margin-top: 4rem;
    font-size: 0.9rem;
    color: #777;
  }

  .flip-container {
    perspective: 1000px;
    width: 300px;
    height: 400px;
    margin: 2rem auto;
  }
  
  .flipper {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    animation: spin 6s infinite linear;
  }
  
  .front, .back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    overflow: hidden;
  }
  
  .front img,
  .back img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  .front {
    transform: rotateY(0deg);
  }
  
  .back {
    transform: rotateY(180deg);
  }
  
  @keyframes spin {
    0% {
      transform: rotateY(0deg);
    }
    50% {
      transform: rotateY(180deg);
    }
    100% {
      transform: rotateY(360deg);
    }
  }
  
/*   
  .image-3d-container.auto {
    perspective: 1000px;
    width: 300px;
    margin: 2rem auto;
  }
  
  .image-3d.auto {
    width: 100%;
    transform-style: preserve-3d;
    border-radius: 10px;
    animation: rotate3D 6s infinite ease-in-out;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }
  
  @keyframes rotate3D {
    0% {
      transform: rotateX(0deg) rotateY(0deg) scale(1);
    }
    25% {
      transform: rotateX(5deg) rotateY(10deg) scale(1.05);
    }
    50% {
      transform: rotateX(0deg) rotateY(0deg) scale(1);
    }
    75% {
      transform: rotateX(-5deg) rotateY(-10deg) scale(1.05);
    }
    100% {
      transform: rotateX(0deg) rotateY(0deg) scale(1);
    }
  }
   */