/* ============================================
   FADE IN ANIMATIONS
   ============================================ */

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Utility Classes - Initial Hidden State */
.fade-in,
.fade-in-up,
.fade-in-down,
.fade-in-left,
.fade-in-right {
  opacity: 0;
}

/* Optimize transform-based animations for GPU acceleration */
.fade-in-up,
.fade-in-down,
.fade-in-left,
.fade-in-right {
  will-change: transform, opacity;
}

/* Visible State - Triggers Animation */
.fade-in.is-visible {
  animation: fadeIn 0.6s ease forwards;
}

.fade-in-up.is-visible {
  animation: fadeInUp 0.6s ease forwards;
}

.fade-in-down.is-visible {
  animation: fadeInDown 0.6s ease forwards;
}

.fade-in-left.is-visible {
  animation: fadeInLeft 0.6s ease forwards;
}

.fade-in-right.is-visible {
  animation: fadeInRight 0.6s ease forwards;
}

/* Respect user's motion preferences for accessibility */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .fade-in-up,
  .fade-in-down,
  .fade-in-left,
  .fade-in-right {
    opacity: 1;
    animation: none;
    transform: none;
  }
  
  .fade-in.is-visible,
  .fade-in-up.is-visible,
  .fade-in-down.is-visible,
  .fade-in-left.is-visible,
  .fade-in-right.is-visible {
    animation: none;
    opacity: 1;
    transform: none;
  }
}