/* Mobile-first design */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  .container {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    max-width: 400px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
  }
  
  h1 {
    margin-bottom: 20px;
  }
  
  .btn-container {
    display: flex;
    flex-direction: column;
  }
  
  button {
    text-transform: uppercase; /* This will ensure all text in buttons is uppercase */
    padding: 10px;
    margin: 5px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
  
  button:hover {
    background-color: #0056b3;
  }
  
  button.correct {
    background-color: green;
  }
  
  button.wrong {
    background-color: red;
  }
  
  .next-btn {
    margin-top: 20px;
  }
  
  .hide {
    display: none;
  }