html {
  scroll-behavior: smooth;
}
.custom-scrollbar::-webkit-scrollbar {
  width: 4px;
}
.custom-scrollbar::-webkit-scrollbar-track {
  background: rgba(24, 24, 27, 0.5); /* zinc-900 */
  border-radius: 4px;
}
.custom-scrollbar::-webkit-scrollbar-thumb {
  background: rgba(245, 158, 11, 0.5); /* amber-500/50 */
  border-radius: 4px;
}
.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: rgba(245, 158, 11, 0.8);
}
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}