#scrollToTopBtn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  width: 50px;
  height: 50px;
  background: #6C4193;
  color: #fdfdfd;
  border: none;
  border-radius: 50%; /* Fully round */
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, transform 0.3s ease, visibility 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  outline: none;
  font-size: 20px;
}

#scrollToTopBtn.show {
  opacity: 1;
  visibility: visible;
}

#scrollToTopBtn:hover {
  transform: scale(1.1);
  background: #6C4193;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}