.whatsapp-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #25D366;
      border-radius: 50%;
      width: 55px;
      height: 55px;
      display: flex;
      justify-content: center;
      align-items: center;
      box-shadow: 0 4px 6px rgba(0,0,0,0.3);
      cursor: pointer;
      z-index: 999;
      transition: background-color 0.3s, transform 0.2s;
    }
    .whatsapp-button:hover {
      background-color: #1ebe57;
      transform: scale(1.05);
    }
    .whatsapp-button img {
      width: 28px;
      height: 28px;
    }
    .whatsapp-popup {
      position: fixed;
      bottom: 90px;
      right: 20px;
      width: 280px;
      background: white;
      border: 1px solid #ddd;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      padding: 15px;
      display: none;
      z-index: 999;
    }
    .whatsapp-popup-header {
      font-weight: bold;
      margin-bottom: 10px;
      color: #075E54;
    }
    .whatsapp-popup p {
      margin: 10px 0;
      font-size: 14px;
      color: #555;
    }
    .whatsapp-popup button {
      background-color: #25D366;
      color: white;
      border: none;
      padding: 10px;
      border-radius: 5px;
      cursor: pointer;
      width: 100%;
      font-size: 15px;
    }
    .whatsapp-popup button:hover {
      background-color: #1ebe57;
    }
    .close-btn {
      position: absolute;
      top: 8px;
      right: 12px;
      font-size: 18px;
      cursor: pointer;
      color: #888;
    }

    /* Mobile adjustments */
    @media (max-width: 480px) {
      .whatsapp-button {
        width: 50px;
        height: 50px;
      }
      .whatsapp-button img {
        width: 24px;
        height: 24px;
      }
      .whatsapp-popup {
        width: 260px;
        right: 15px;
      }
    }