/**
 * Navigation crossfade fallback when View Transitions API is unavailable.
 */
@supports not (view-transition-name: none) {
  html.vs-nav-exiting {
    opacity: 0;
    transition: opacity var(--motion-fast, 150ms) var(--ease-standard, cubic-bezier(0.4, 0, 0.2, 1));
  }

  html.vs-nav-entering {
    animation: vs-nav-enter var(--motion-base, 280ms) var(--ease-emphasis, cubic-bezier(0.16, 1, 0.3, 1)) both;
  }
}

@keyframes vs-nav-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html.vs-nav-exiting,
  html.vs-nav-entering {
    opacity: 1 !important;
    animation: none !important;
    transition: none !important;
  }
}