/* GSAP Initial States (to prevent FOUC) */
.formula-card-wrapper {
  opacity: 0;
  transform: translateY(20px);
}

.chapter-title {
  opacity: 0;
  transform: translateX(-20px);
}

.topic-btn {
  opacity: 0;
}

/* Custom CSS Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

.slide-up {
  animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Formula Modal Math Pop Animation */
.katex-display {
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.formula-hero:hover .katex-display {
  transform: scale(1.05);
}