/* ── Barba transitions: shutter close (letterbox iris) ── */
.transition-shutter {
  position: fixed;
  left: 0; right: 0;
  height: 0;
  background: #000;
  z-index: 9000;
  pointer-events: none;
}
.transition-shutter--top    { top: 0; }
.transition-shutter--bottom { bottom: 0; }

.transition-label {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9001;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  opacity: 0;
  mix-blend-mode: difference;
}
.transition-label::before,
.transition-label::after {
  content: '';
  width: 24px; height: 1px;
  background: currentColor;
}