.whatsapp-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #25D366;
    color: white;
    border-radius: 50px;
    padding: 12px 18px;
    display: flex;
    align-items: center;
    font-family: Arial, sans-serif;
    font-size: 14px;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    z-index: 999;
  }

  .whatsapp-btn:hover {
    transform: scale(1.1);
    background-color: #1ebe5d;
  }

  .whatsapp-btn img {
    width: 20px;
    margin-right: 10px;
  }

  .tooltip {
    position: absolute;
    right: 70px;
    background: #333;
    color: #fff;
    padding: 6px 10px;
    border-radius: 5px;
    font-size: 12px;
    opacity: 0;
    transition: 0.3s;
    white-space: nowrap;
  }

  .whatsapp-btn:hover .tooltip {
    opacity: 1;
  }