body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
    text-align: center;
    overflow: hidden;
  }
  
  #backgroundVideo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
  }
  
  .content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  header {
    background-color: rgba(0, 115, 230, 0.8);
    color: white;
    padding: 20px;
    width: 100%;
    animation: fadeIn 2s ease-in-out;
  }
  
  main {
    padding: 20px;
    width: 100%;
  }
  
  .test-section {
    margin: 20px 0;
  }
  
  button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #0073e6;
    color: white;
    border: none;
    cursor: pointer;
    animation: pulse 2s infinite;
  }
  
  button:hover {
    background-color: #005bb5;
  }
  
  .results {
    margin-top: 40px;
  }
  
  .chart-container {
    width: 80%;
    margin: 0 auto;
  }
  
  .summary {
    margin-top: 20px;
    font-size: 18px;
    animation: fadeIn 2s ease-in-out;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  
  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
  }