#scrollToTop {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #3b82f6;
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 18px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  transition: opacity 0.3s ease;
}
#scrollToTop:hover {
  background-color: #2563eb;
  opacity: 0.9;
}
#scrollToTop.show {
  display: flex;
}