body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: #333;
  }
  
  .main-container, .error-container {
    text-align: center;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }
  
  h1 {
    font-size: 24px;
    margin-bottom: 20px;
  }
  
  h2 {
    font-size: 18px;
    color: #555;
  }
  
  a {
    color: #007bff;
    text-decoration: none;
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  .card {
    padding: 20px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background-color: #fafafa;
  }