/* ============================================================
   PAGE TRANSITIONS (shared)
   Fade the document's content in on load, and fade it out before
   navigating away. Paired with js/transitions.js which flips
   body.page-exiting on internal link clicks and handles a
   Pulse Grid loader overlay for slow loads.

   NOTE: The fade targets body's children (not body itself) so
   that the .page-loader overlay — also a child of body — can
   stay visible ABOVE a fading-out page during navigation.
   ============================================================ */

body > :not(.page-loader) {
  animation: page-fade-in 350ms ease-out both;
}
body.page-exiting > :not(.page-loader) {
  animation: none;
  opacity: 0;
  transition: opacity 260ms ease-in;
}
@keyframes page-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ============================================================
   PAGE LOADER · Pulse Grid
   Shows automatically whenever body carries .page-exiting
   (internal nav) OR .is-initial-loading (first paint waiting
   on images/fonts). A 250ms show-delay means fast loads never
   actually flash the overlay — it only appears on slow ones.
   ============================================================ */

.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(250, 249, 247, 0.94);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

/* Auto-show during any page-wide transition state.
   Transition-delay of 250ms means if the navigation / load
   completes within 250ms, the overlay never becomes visible. */
body.page-exiting .page-loader,
body.is-initial-loading .page-loader {
  opacity: 1;
  pointer-events: auto;
  transition: opacity 220ms ease 250ms;
}

.page-loader .pl-grid {
  display: grid;
  grid-template-columns: repeat(3, 14px);
  gap: 8px;
}
.page-loader .pl-grid span {
  width: 14px;
  height: 14px;
  background: #1a1a2e;
  border-radius: 2px;
  animation: pl-pulse 1.4s ease-in-out infinite;
}
.page-loader .pl-grid span:nth-child(1) { animation-delay: 0.0s; }
.page-loader .pl-grid span:nth-child(2) { animation-delay: 0.1s; }
.page-loader .pl-grid span:nth-child(3) { animation-delay: 0.2s; }
.page-loader .pl-grid span:nth-child(4) { animation-delay: 0.1s; }
.page-loader .pl-grid span:nth-child(5) { animation-delay: 0.2s; }
.page-loader .pl-grid span:nth-child(6) { animation-delay: 0.3s; }
.page-loader .pl-grid span:nth-child(7) { animation-delay: 0.2s; }
.page-loader .pl-grid span:nth-child(8) { animation-delay: 0.3s; }
.page-loader .pl-grid span:nth-child(9) { animation-delay: 0.4s; }

@keyframes pl-pulse {
  0%, 100% { opacity: 0.2; transform: scale(0.8); }
  50%      { opacity: 1;   transform: scale(1.1); background: #1a9e8f; }
}

/* Respect reduced-motion: no fades, no pulsing loader. */
@media (prefers-reduced-motion: reduce) {
  body > :not(.page-loader),
  body.page-exiting > :not(.page-loader) {
    animation: none;
    transition: none;
    opacity: 1;
  }
  .page-loader { display: none !important; }
}