body {
      font-family: Bookman Old Style, Arial, sans-serif;
      line-height: 1.6;
      padding: 20px;
    }
    .tooltip-word {
      cursor: pointer;
      border-bottom: 1px dotted #666;
    }
    #popup-meaning {
      position: absolute;
      background: #fefefe;
      border: 1px solid #aaa;
      padding: 8px;
      border-radius: 6px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.2);
      z-index: 9999;
      max-width: 200px;
      font-size: 14px;
    }