/* Avataredu UI utilities — entry animations + shared bits */

/* Anchor scroll behavior — smooth jumps, clear the 5rem sticky navbar */
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
:target { scroll-margin-top: 5.5rem; }

[data-animate="fade-up"] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-animate="fade-up"].animate-in {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-in"] {
  opacity: 0;
  transition: opacity 0.5s ease;
}
[data-animate="fade-in"].animate-in {
  opacity: 1;
}

[data-animate="scale-in"] {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
[data-animate="scale-in"].animate-in {
  opacity: 1;
  transform: scale(1);
}

/* stagger using --i — capped so far-down items still feel snappy */
[data-animate][style*="--i"] {
  transition-delay: calc(min(var(--i, 0), 5) * 50ms);
}

/* Skeleton shimmer */
.skeleton {
  background: linear-gradient(90deg, #f3f4f6 0%, #e5e7eb 50%, #f3f4f6 100%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.4s ease-in-out infinite;
  border-radius: 8px;
}
@keyframes skeleton-pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Card hover lift */
.card-lift {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

/* Subtle pulse for "live" indicators */
@keyframes soft-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.animate-soft-pulse {
  animation: soft-pulse 2s ease-in-out infinite;
}

/* Confetti for chapter / course completion celebrations */
@keyframes confetti-fall {
  0% {
    transform: translateY(-10vh) rotate(0deg);
    opacity: 0.95;
  }
  100% {
    transform: translateY(110vh) rotate(720deg);
    opacity: 0;
  }
}