/* ==========================================================================
   VaultEdu System Realm — Animations
   ========================================================================== */

@keyframes vlt-spin {
  to { transform: rotate(360deg); }
}

@keyframes vlt-slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes vlt-slide-up {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes vlt-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes vlt-scale-in {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes vlt-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes vlt-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* — Animation Classes — */
.vlt-animate-in { animation: vlt-fade-in 0.3s ease forwards; }
.vlt-animate-slide-up { animation: vlt-slide-up 0.4s ease forwards; }
.vlt-animate-scale-in { animation: vlt-scale-in 0.2s ease forwards; }
.vlt-animate-pulse { animation: vlt-pulse 2s ease infinite; }

/* — Skeleton Loading — */
.vlt-skeleton {
  background: linear-gradient(90deg, var(--color-bg-tertiary) 25%, var(--color-bg-hover) 50%, var(--color-bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: vlt-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.vlt-skeleton--text { height: 16px; margin-bottom: var(--space-2); }
.vlt-skeleton--title { height: 24px; width: 60%; margin-bottom: var(--space-3); }
.vlt-skeleton--card { height: 120px; }
.vlt-skeleton--avatar { width: 40px; height: 40px; border-radius: var(--radius-full); }

/* — Stagger Children — */
.vlt-stagger > * { animation: vlt-slide-up 0.4s ease forwards; opacity: 0; }
.vlt-stagger > *:nth-child(1) { animation-delay: 0ms; }
.vlt-stagger > *:nth-child(2) { animation-delay: 50ms; }
.vlt-stagger > *:nth-child(3) { animation-delay: 100ms; }
.vlt-stagger > *:nth-child(4) { animation-delay: 150ms; }
.vlt-stagger > *:nth-child(5) { animation-delay: 200ms; }
.vlt-stagger > *:nth-child(6) { animation-delay: 250ms; }
.vlt-stagger > *:nth-child(7) { animation-delay: 300ms; }
.vlt-stagger > *:nth-child(8) { animation-delay: 350ms; }

/* — Page Transitions — */
.vlt-page-enter {
  animation: vlt-fade-in 0.3s ease forwards;
}