.tab-btn {
  transition: color 0.2s, border-color 0.2s;
}

.active-tab {
  color: #2563eb;
  border-bottom-color: #2563eb;
}

.tab-panel {
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}