/* ==========================================================================
   View Transitions API - Page Transitions
   ========================================================================== */

/* Keyframes */
@keyframes fade-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

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

/* Native View Transitions (Chrome 111+, Safari 18+) */
@view-transition {
  navigation: auto;
}

::view-transition-old(page-group) {
  animation: fade-out var(--transition-duration) var(--easing-out) forwards;
}

::view-transition-new(page-group) {
  animation: fade-in var(--transition-duration) var(--easing-in) var(--transition-duration) backwards;
}

/* Ensure smooth transition between old and new */
::view-transition-group(page-group) {
  animation-duration: calc(var(--transition-duration) * 2);
}

/* ==========================================================================
   Reduced Motion Support
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }
}

/* ==========================================================================
   Fallback for browsers without View Transitions API
   ========================================================================== */

.page-enter {
  opacity: 0;
}

.page-enter-active {
  opacity: 1;
  transition: opacity var(--transition-duration) var(--easing-in);
}

.page-exit {
  opacity: 1;
}

.page-exit-active {
  opacity: 0;
  transition: opacity var(--transition-duration) var(--easing-out);
}

/* Initial page load animation */
@keyframes page-load {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

body {
  animation: page-load 0.5s ease-out;
}