body {
    font-family: 'Comic Sans MS', cursive;
    background: #d4f1f9;
    text-align: center;
    padding: 30px;
  }
  
  #intro-screen, #game-container {
    max-width: 700px;
    margin: auto;
    background: #fff;
    border: 5px solid #2b7a78;
    padding: 25px;
    border-radius: 20px;
  }
  
  .btn {
    padding: 12px 20px;
    margin: 10px;
    font-size: 18px;
    border: none;
    border-radius: 10px;
    background: #56ccf2;
    color: #fff;
    cursor: pointer;
  }
  
  .btn:hover {
    background: #2d9cdb;
  }
  
  .zone-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }
  
  .zone-options .btn {
    width: 180px;
    line-height: 1.4;
    font-size: 16px;
  }
  
  #health-bar {
    width: 100%;
    height: 25px;
    background: #eee;
    border-radius: 15px;
    border: 2px solid #999;
    margin: 20px 0;
  }
  
  #health-fill {
    height: 100%;
    width: 100%;
    background: #4caf50;
    border-radius: 15px;
    transition: width 0.4s;
  }
  
  #aqi-info {
    background: transparent;
    border: none;
    color: #0077aa;
    font-weight: bold;
    cursor: pointer;
    font-size: 14px;
  }
  
  #aqi-modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  #modal-content {
    background: white;
    padding: 30px;
    border-radius: 20px;
    max-width: 400px;
    text-align: center;
  }
  #inventory {
    margin-top: 10px;
    padding: 10px;
    border-top: 2px dashed #aaa;
    font-size: 16px;
  }
  
  #bonus-choice {
    margin-top: 20px;
  }
  
  #trophies {
    background: #e7ffe7;
    border: 2px solid #4caf50;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }