/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    height: 100vh;
  }
  
  /* Main container split into left and right */
  .container {
    display: flex;
    width: 100%;
    height: 100%;
  }
  
  /* Left: main game area */
  .left-panel {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #fff;
    border-right: 2px solid #ddd;
    overflow-y: auto;
  }
  
  .left-panel h1 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #444;
  }
  
  .stats {
    font-size: 18px;
    margin-bottom: 20px;
    text-align: center;
  }
  
  #click-button {
    background: none;
    border: none;
    cursor: pointer;
    transition: transform 0.1s ease;
    margin: 30px 0;
  }
  
  #click-button img {
    width: 150px;
    height: 150px;
    object-fit: contain;
    transition: transform 0.2s ease;
  }
  
  #click-button:active img {
    transform: scale(0.95);
  }
  
  #rebirth-button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #1976d2;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
  }
  
  #rebirth-button:hover {
    background-color: #0d47a1;
  }
  
  /* Right: upgrades panel */
  .right-panel {
    width: 300px;
    background-color: #f8f9fa;
    padding: 20px;
    overflow-y: auto;
    border-left: 2px solid #ddd;
  }
  
  .right-panel h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #555;
  }
  
  /* Upgrade buttons */
  .upgrade-button {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 10px;
    text-align: left;
    font-size: 14px;
    border: 1px solid #ccc;
    background-color: #fff;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
  }
  
  .upgrade-button:hover {
    background-color: #e3f2fd;
  }
  
  .upgrade-button:active {
    transform: scale(0.97);
  }
  
  /* Scrollbar styling (optional, for modern look) */
  .right-panel::-webkit-scrollbar {
    width: 8px;
  }
  
  .right-panel::-webkit-scrollbar-thumb {
    background-color: #bbb;
    border-radius: 4px;
  }
  
  .right-panel::-webkit-scrollbar-track {
    background-color: #f0f0f0;
  }