#scroll-top {
  border-radius: 0.75rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

#scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

#scroll-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(230, 0, 0, 0.3);
}

#scroll-top:active {
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  #scroll-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 2.75rem;
    height: 2.75rem;
  }
}