body {
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
  }
  body.fade-in {
    opacity: 1;
  }
  body.fade-out {
    opacity: 0;
  }
  @keyframes fadeInContent {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .whatsapp-button {
    display: inline-flex;
    align-items: center;
    padding: 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
  }
  
  .whatsapp-button:hover {
    background-color: #1ebe5d;
  }