.scrollToTopButton {
    position: fixed;
    right: 20px; 
    background-color: #16266c; 
    color: white; 
    border: none;
    border-radius: 50%;
    padding: 8px 15px;
    font-size: 20px;
    cursor: pointer;
    display: none; /* Initially hidden */
    transition: opacity 0.3s ease;
    z-index: 100;
  }
  
  .scrollToTopButton.visible {
    display: block; 
  }
  
  .scrollToTopButton:hover {
    background-color: #263783;
  }
  
  .scrollToTopButtonContainer {
    position: relative;
  }