:root {
  --route-enter-duration: 520ms;
  --route-exit-duration: 240ms;
  --route-reduced-enter-duration: 360ms;
  --route-reduced-exit-duration: 180ms;
  --route-motion-ease: cubic-bezier(.16, 1, .3, 1);
  --route-exit-ease: cubic-bezier(.4, 0, .6, 1);
}

html {
  background: #080808;
}

.navigation-progress {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 10050;
  height: 2px;
  pointer-events: none;
  background: #eff923;
  box-shadow: 0 0 14px rgba(239, 249, 35, .64);
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left center;
}

body.route-pending .navigation-progress {
  opacity: 1;
  animation: route-progress 1.45s var(--route-motion-ease) both;
}

body > main,
body > .hero,
body > .app,
body > .login-shell {
  animation: route-surface-in var(--route-enter-duration) var(--route-motion-ease) both;
  transition:
    opacity var(--route-exit-duration) var(--route-exit-ease),
    transform var(--route-exit-duration) var(--route-exit-ease),
    filter var(--route-exit-duration) var(--route-exit-ease);
}

body.route-leaving > main,
body.route-leaving > .hero,
body.route-leaving > .app,
body.route-leaving > .login-shell {
  opacity: .08;
  transform: translateY(-10px) scale(.995);
  filter: blur(1px);
}

@keyframes route-progress {
  0% { transform: scaleX(.04); }
  28% { transform: scaleX(.42); }
  66% { transform: scaleX(.76); }
  100% { transform: scaleX(.94); }
}

@keyframes route-surface-in {
  from { opacity: 0; transform: translateY(16px) scale(.995); filter: blur(1px); }
  to { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

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

@media (prefers-reduced-motion: reduce) {
  body > main,
  body > .hero,
  body > .app,
  body > .login-shell {
    animation: route-surface-fade-in var(--route-reduced-enter-duration) ease-out both;
    transition: opacity var(--route-reduced-exit-duration) ease-out;
  }
  body.route-pending .navigation-progress {
    animation: none;
  }
  body.route-leaving > main,
  body.route-leaving > .hero,
  body.route-leaving > .app,
  body.route-leaving > .login-shell {
    opacity: .32;
    transform: none;
    filter: none;
  }
}