/* ── Lightbox ──────────────────────────────────────────────────── */
#lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

#lightbox.is-open {
  opacity: 1;
  pointer-events: all;
}

#lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  display: block;
  user-select: none;
}

#lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  color: #000;
  padding: 0.25rem;
}

#lightbox-close:focus-visible {
  outline: 1px solid #000;
  outline-offset: 3px;
}

.lightbox-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: #000;
  padding: 1rem;
  line-height: 1;
}

.lightbox-arrow:focus-visible {
  outline: 1px solid #000;
  outline-offset: 3px;
}

#lightbox-prev { left: 1rem; }
#lightbox-next { right: 1rem; }

@media (max-width: 480px) {
  .lightbox-arrow { font-size: 1.5rem; padding: 0.75rem; }
  #lightbox-close { font-size: 1.5rem; }
}