body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f9f9f9;
    }

    /* Botón flotante de WhatsApp */
    .whatsapp-btn {
      position: fixed;
      bottom: 30px;
      right: 30px;
      background-color: #25D366;
      color: white;
      border-radius: 50%;
      width: 60px;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      z-index: 1000;
    }

    .whatsapp-btn img {
      width: 30px;
    }

    /* Estilo del popup */
    .modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0,0,0,0.5);
      z-index: 1001;
    }

    .modal-content {
      background-color: white;
      margin: 15% auto;
      padding: 25px;
      border-radius: 10px;
      width: 90%;
      max-width: 400px;
    }

    .close-btn {
      float: right;
      font-weight: bold;
      cursor: pointer;
      font-size: 20px;
      color: #aaa;
    }

    .close-btn:hover {
      color: #333;
    }

    h2 {
      margin-top: 0;
    }

    input[type="text"] {
      width: 100%;
      padding: 10px;
      margin-bottom: 15px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 14px;
    }

    button.modal-button {
      background-color: #25D366;
      color: white;
      border: none;
      padding: 10px 15px;
      border-radius: 5px;
      cursor: pointer;
      width: 100%;
      font-size: 16px;
    }

    button.modal-button:hover {
      background-color: #1da851;
    }