/* Improved Back to Top Button */
#btn-back-to-top {
  display: none;
  position: fixed;
  bottom: 100px; /* Increased to stay clear of bottom nav */
  right: 20px;
  z-index: 1100; /* Higher than nav to ensure it's on top */
  background: var(--gradient-primary);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(58, 134, 255, 0.4);
  transition: all 0.3s;
}

#btn-back-to-top:hover {
  transform: translateY(-5px);
  filter: brightness(1.2);
}

#angle-up {
  color: white;
}