/* ================================
   NEXTSTEP BACK TO TOP BUTTON
   ================================ */

#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  z-index: 9000;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.55);
}

#back-to-top:active {
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  #back-to-top {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }
}