/* source/css/copy-button.css */
.highlight {
    position: relative;
  }
  
  .copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    color: #fff;
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
  }
  
  .highlight:hover .copy-btn {
    opacity: 1;
  }
  
  .copy-btn.copied {
    background: #4CAF50;
    border-color: #4CAF50;
  }