body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
  }
  
  .container {
    width: 90%;
    max-width: 900px;
    margin: auto;
    padding: 20px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
    border-radius: 8px;
  }
  
  h1 {
    text-align: center;
  }
  
  .tabs {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
  }
  
  .tabs button {
    padding: 10px 20px;
    cursor: pointer;
    background-color: #007bff;
    border: none;
    color: white;
    border-radius: 5px;
    font-size: 16px;
  }
  
  .tabs button.active {
    background-color: #0056b3;
  }
  
  .tab-content {
    display: none;
  }
  
  .tab-content.active {
    display: block;
  }
  
  .accordion {
    margin-bottom: 10px;
  }
  
  .accordion h3 {
    background: #eee;
    margin: 0;
    padding: 10px;
    cursor: pointer;
  }
  
  .accordion-content {
    display: none;
    padding: 10px;
    border: 1px solid #ddd;
    border-top: none;
  }
  
  .question {
    margin-bottom: 20px;
  }
  
  .question h3 {
    margin: 0 0 10px;
  }
  
  .question button {
    display: block;
    margin-bottom: 5px;
    padding: 10px;
    width: 100%;
    text-align: left;
    background-color: #eee;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  
  .question button.correct {
    background-color: #28a745;
    color: white;
  }
  
  .question button.incorrect {
    background-color: #dc3545;
    color: white;
  }