/* ═══════════════════════════════════════════════════════════
   pageCurtain.css — Cinematic split-panel wipe transition
   ═══════════════════════════════════════════════════════════ */

.page-curtain {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  display: flex;
}

/* Two panels — left and right */
.page-curtain__panel {
  flex: 1;
  height: 100%;
  background: var(--color-bg-primary);
  transform: scaleX(0);
  will-change: transform;
}

.page-curtain__panel--left {
  transform-origin: left center;
}

.page-curtain__panel--right {
  transform-origin: right center;
}

/* ── CLOSE IN (panels wipe in from edges, covering screen) ── */
.page-curtain.is-closing .page-curtain__panel--left {
  animation: curtain-in-left 0.45s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.page-curtain.is-closing .page-curtain__panel--right {
  animation: curtain-in-right 0.45s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

/* ── OPEN OUT (panels wipe out to edges, revealing screen) ── */
.page-curtain.is-opening .page-curtain__panel--left {
  transform: scaleX(1);
  transform-origin: right center;
  animation: curtain-out-left 0.5s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.page-curtain.is-opening .page-curtain__panel--right {
  transform: scaleX(1);
  transform-origin: left center;
  animation: curtain-out-right 0.5s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

/* ── KEYFRAMES ── */
@keyframes curtain-in-left {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes curtain-in-right {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes curtain-out-left {
  from { transform: scaleX(1); }
  to   { transform: scaleX(0); }
}

@keyframes curtain-out-right {
  from { transform: scaleX(1); }
  to   { transform: scaleX(0); }
}

/* ── Respect reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .page-curtain__panel {
    display: none;
  }
}