#scrollUpBtn {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, #007bff, #ff6a00);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 9999;
}

#scrollUpBtn:hover {
  transform: scale(1.1) rotate(-5deg);
}