@keyframes slideFadeIn {
  0% {
    transform: translateY(30px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

.slideFadeIn {
  animation: slideFadeIn 0.6s ease-out;
}

#choices button {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#choices button:active {
  transform: scale(0.95);
}

.selected {
  background-color: #007bff;
  color: white;
  box-shadow: 0 0 10px #007bff80;
}

#choices button.correct {
  background-color: #28a745 !important;
  color: white;
  animation: pulse 0.5s ease-in-out;
}

#choices button.incorrect {
  background-color: #dc3545 !important;
  color: white;
  opacity: 0.6;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}