#goToTopBtn {
  display: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 99;
  border: none;
  outline: none;
  background-color: var(--primary-color, #3498db);
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 50%;
  font-size: 18px;
  width: 50px;
  height: 50px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

#goToTopBtn:hover {
  background-color: var(--primary-color-dark, #2980b9);
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
  #goToTopBtn {
    bottom: 20px;
    right: 20px;
    padding: 12px;
    width: 45px;
    height: 45px;
    font-size: 16px;
  }
}