body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background-color: #000;
    color: #fff;
  }

  header {
    background-color: #333;
    padding: 15px;
    text-align: center;
    color: #fff;
  }

  #container {
    display: flex;
    flex-direction: column;
  }

  .card {
    margin: 20px;
    padding: 20px;
    box-sizing: border-box;
    border-radius: 10px;
    background-color: #333;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    animation: fadeIn 1s ease-out;
  }

  h1, h2, p {
    margin: 0;
    padding: 0;
  }

  #section1 {
    background-color: #555;
  }

  #section2 {
    background-color: #444;
  }

  #section3 {
    background-color: #333;
  }

  #section4 {
    background-color: #666;
  }

  #section5 {
    background-color: #777;
  }

  /* Scroll Animation */
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }