body {
  font-family: Arial, sans-serif;
  }
  
  .navbar {
  background-color: #333;
  }
  
  .navbar-brand, .nav-link {
  color: #fff;
  font-weight: bold;
  }
  
  .nav-link:hover {
  color: #eee;
  }
  
  .container {
  max-width: 800px;
  margin: 0 auto;
  }
  
  h1 {
  font-size: 2em;
  font-weight: bold;
  }
  
  p {
  font-size: 1.2em;
  line-height: 1.5;
  }

  #play-button {     
    background-color: green;     
    color: white;     
    padding: 10px 20px;     
    border: none;     
    cursor: pointer; 
  }  
  #game-container {     
    width: 600px;     
    height: 400px;     
    border: 2px solid black; 
  }