.lightbox {
  width: 100%;
  max-width: 100%;
  height: 100%;
  max-height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-on-dark);
  overflow: hidden;
}

.lightbox::backdrop {
  background: var(--scrim-modal);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.lightbox[open],
.lightbox[open]::backdrop {
  animation: lightbox-in var(--transition-base);
}
.lightbox.is-closing,
.lightbox.is-closing::backdrop {
  animation: lightbox-out var(--transition-base) forwards;
}

.lightbox__inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: 1fr auto auto;
  align-items: center;
  gap: var(--space-md);
  padding: clamp(1rem, 4vw, 3rem);
}

.lightbox__figure {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  min-height: 0;
  margin: 0;
}

.lightbox__img {
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: var(--shadow-lg);
}

.lightbox__caption {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-on-dark-soft);
  text-align: center;
}

.lightbox__nav {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  color: var(--color-on-dark);
  background: var(--scrim-control);
  border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--transition-base);
}
.lightbox__nav:hover { background: var(--scrim-control-hover); }
.lightbox__nav--prev { grid-column: 1; grid-row: 1; }
.lightbox__nav--next { grid-column: 3; grid-row: 1; }

.lightbox__close {
  position: absolute;
  top: clamp(1rem, 3vw, 2rem);
  right: clamp(1rem, 3vw, 2rem);
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  color: var(--color-on-dark);
  background: var(--scrim-control);
  border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--transition-base);
  z-index: 1;
}
.lightbox__close:hover { background: var(--scrim-control-hover); }

.lightbox__thumbs {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  justify-content: flex-start;
  gap: var(--space-xs);
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-behavior: smooth;
  padding-bottom: var(--space-2xs);
  scrollbar-width: thin;
  scrollbar-color: var(--border-on-dark) transparent;
}

.lightbox__thumbs::before,
.lightbox__thumbs::after {
  content: "";
  flex: 1 0 auto;
}

.lightbox__thumbs[hidden] { display: none; }

.lightbox__thumb {
  flex: 0 0 auto;
  width: 84px;
  height: 60px;
  padding: 0;
  overflow: hidden;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  opacity: 0.5;
  cursor: pointer;
  transition:
    opacity var(--transition-base),
    border-color var(--transition-base);
}

.lightbox__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lightbox__thumb:hover { opacity: 1; }

.lightbox__thumb.is-active {
  opacity: 1;
  border-color: var(--color-brand);
}

.lightbox__thumb:focus-visible {
  opacity: 1;
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

.lightbox__counter {
  grid-column: 2;
  grid-row: 3;
  margin: 0;
  text-align: center;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-on-dark-soft);
}

@media (max-width: 600px) {
  .lightbox__inner { gap: var(--space-xs); padding: var(--space-md); }
  .lightbox__nav { width: 2.5rem; height: 2.5rem; }
  .lightbox__img { max-height: 62vh; }
  .lightbox__thumb { width: 64px; height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  .lightbox__thumbs { scroll-behavior: auto; }
}

@keyframes lightbox-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes lightbox-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .lightbox[open],
  .lightbox[open]::backdrop,
  .lightbox.is-closing,
  .lightbox.is-closing::backdrop {
    animation: none;
  }
}