.pbc-viewer {
  color: var(--ink);
  font-family: var(--font-sans);
  min-width: 0;
}

.pbc-viewer * {
  box-sizing: border-box;
}

.pbc-viewer {
  width: 100%;
  margin: 22px 0 28px;
  padding: 16px;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: transparent;
}

.pbc-viewer button,
.pbc-viewer input {
  font: inherit;
}

.pbc-viewer button {
  color: inherit;
}

.pbc-viewer button:focus-visible,
.pbc-viewer input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.pbc-viewer__case-nav {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule-2);
}

.pbc-viewer__case-strip:first-child:last-child {
  grid-column: 1 / -1;
}

.pbc-viewer__case-strip {
  display: flex;
  gap: 8px;
  min-width: 0;
  padding: 3px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: x proximity;
  scrollbar-color: var(--rule) transparent;
  scrollbar-width: thin;
}

.pbc-viewer__case-chip {
  position: relative;
  display: grid;
  grid-template-columns: 42px auto;
  flex: 0 0 auto;
  gap: 7px;
  align-items: center;
  min-width: 74px;
  height: 48px;
  padding: 3px 8px 3px 3px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
  scroll-snap-align: start;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.pbc-viewer__case-chip.pbc-viewer__case-chip--image {
  grid-template-columns: auto;
  min-width: 0;
  padding: 3px;
}

.pbc-viewer__case-chip:hover {
  border-color: var(--ink-3);
  color: var(--ink);
}

.pbc-viewer__case-chip.is-active {
  border-color: var(--accent);
  color: var(--accent-ink);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.pbc-viewer__case-chip img {
  width: 42px;
  height: 40px;
  object-fit: cover;
  border-radius: 5px;
  background: var(--paper-2);
}

.pbc-viewer__case-chip span,
.pbc-viewer__case-arrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.pbc-viewer__case-arrow {
  display: grid;
  width: 32px;
  height: 32px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

.pbc-viewer__case-arrow:hover {
  border-color: var(--ink-3);
  color: var(--ink);
}

.pbc-viewer__content {
  min-width: 0;
}

.pbc-viewer__prompt {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  margin: 16px 0 14px;
  padding: 7px 0 7px 14px;
  border-left: 3px solid var(--accent);
  color: var(--ink-2);
  font-family: var(--font-display);
  font-size: 14px;
  font-style: italic;
  line-height: 1.55;
}

.pbc-viewer__prompt strong {
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-style: normal;
  font-weight: 500;
  letter-spacing: .04em;
  white-space: nowrap;
}

.pbc-viewer__focus-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.pbc-viewer__prompt + .pbc-viewer__focus-grid {
  margin-top: 0;
}

.pbc-viewer__focus-grid--reconstruction,
.pbc-viewer__focus-grid--text_to_image,
.pbc-viewer__focus-grid--reconstruction + .pbc-viewer__focus-meta,
.pbc-viewer__focus-grid--text_to_image + .pbc-viewer__focus-meta {
  max-width: 900px;
  margin-inline: auto;
}

.pbc-viewer__focus-grid--editing {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pbc-viewer__focus-card {
  min-width: 0;
  margin: 0;
}

.pbc-viewer__focus-media,
.pbc-viewer__thumb-media {
  display: grid;
  width: 100%;
  overflow: hidden;
  place-items: center;
  border: 1px solid var(--rule-2);
  border-radius: 8px;
  background: var(--paper-2);
}

.pbc-viewer__focus-media img,
.pbc-viewer__focus-media canvas,
.pbc-viewer__thumb-media canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  image-rendering: auto;
}

.pbc-viewer__focus-card figcaption {
  margin-top: 7px;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.35;
  text-align: center;
}

.pbc-viewer__focus-step {
  color: var(--accent-ink);
  font-weight: 500;
}

.pbc-viewer__focus-meta {
  min-height: 18px;
  margin: 8px 0 14px;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  line-height: 1.45;
  text-align: right;
}

.pbc-viewer__filmstrip {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  min-width: 0;
  padding: 3px;
}

.pbc-viewer__checkpoint {
  display: block;
  min-width: 0;
  padding: 6px;
  appearance: none;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.pbc-viewer__checkpoint:hover {
  border-color: var(--ink-3);
  background: var(--paper-2);
}

.pbc-viewer__checkpoint.is-best {
  border-color: var(--accent);
}

.pbc-viewer__checkpoint.is-selected {
  outline: 2px solid var(--ink);
  outline-offset: 1px;
}

.pbc-viewer__checkpoint.is-best.is-selected {
  outline-color: var(--accent);
}

.pbc-viewer__checkpoint-head {
  display: flex;
  gap: 5px;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  margin-bottom: 6px;
}

.pbc-viewer__checkpoint-chip,
.pbc-viewer__psnr {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
  white-space: nowrap;
}

.pbc-viewer__checkpoint-chip {
  padding: 2px 6px;
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink-2);
  font-weight: 500;
}

.pbc-viewer__checkpoint.is-best .pbc-viewer__checkpoint-chip {
  background: var(--accent);
  color: var(--on-accent);
}

.pbc-viewer__psnr {
  display: block;
  margin-top: 6px;
  overflow: hidden;
  color: var(--ink-2);
  text-align: center;
  text-overflow: ellipsis;
}

.pbc-viewer__best {
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.25;
  white-space: nowrap;
}

.pbc-viewer__checkpoint.is-best .pbc-viewer__psnr {
  color: var(--accent-ink);
}

.pbc-viewer__thumb-media {
  border: 0;
  border-radius: 5px;
}

.pbc-viewer__controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--rule-2);
}

.pbc-viewer__button {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 7px 13px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}

.pbc-viewer__button:hover:not(:disabled) {
  border-color: var(--ink);
  color: var(--ink);
}

.pbc-viewer .pbc-viewer__button--primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.pbc-viewer .pbc-viewer__button--primary:hover:not(:disabled) {
  border-color: var(--accent-ink);
  background: var(--accent-ink);
  color: var(--on-accent);
}

.pbc-viewer__button:disabled,
.pbc-viewer__slider:disabled {
  cursor: wait;
  opacity: .48;
}

.pbc-viewer__scrubber {
  display: grid;
  grid-template-columns: minmax(90px, 1fr) 42px;
  flex: 1 1 180px;
  gap: 9px;
  align-items: center;
  min-width: 120px;
}

.pbc-viewer__slider {
  width: 100%;
  min-width: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.pbc-viewer__percentage {
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.pbc-viewer__skeleton {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.pbc-viewer__skeleton span,
.pbc-viewer__focus-media.is-loading,
.pbc-viewer__thumb-media.is-loading {
  background: var(--paper-2);
  animation: pbc-pulse 1.25s ease-in-out infinite alternate;
}

.pbc-viewer__skeleton span {
  aspect-ratio: 1;
  border-radius: 8px;
}

.pbc-viewer__skeleton span:last-child {
  grid-column: 1 / -1;
  aspect-ratio: 7 / 1;
}

.pbc-viewer__loading {
  margin: 10px 0 0;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 12px;
}

.pbc-viewer__error {
  padding: 22px 16px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 14px;
  text-align: center;
}

.pbc-viewer__visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

@keyframes pbc-pulse {
  from { opacity: .55; }
  to { opacity: 1; }
}

@media (max-width: 640px) {
  .pbc-viewer {
    padding: 11px;
  }

  .pbc-viewer__case-nav {
    gap: 5px;
    padding-bottom: 11px;
  }

  .pbc-viewer__case-strip {
    gap: 7px;
  }

  .pbc-viewer__case-chip {
    grid-template-columns: 38px auto;
    height: 44px;
    min-width: 68px;
    gap: 6px;
  }

  .pbc-viewer__case-chip img {
    width: 38px;
    height: 36px;
  }

  .pbc-viewer__case-arrow {
    width: 29px;
    height: 29px;
  }

  .pbc-viewer__prompt {
    grid-template-columns: 1fr;
    gap: 3px;
    margin: 13px 0 11px;
    padding: 5px 0 5px 10px;
    font-size: 12px;
  }

  .pbc-viewer__prompt strong {
    font-size: 11px;
  }

  .pbc-viewer__focus-grid {
    gap: 6px;
    margin-top: 13px;
  }

  .pbc-viewer__focus-media {
    border-radius: 6px;
  }

  .pbc-viewer__focus-card figcaption {
    margin-top: 5px;
    font-size: 11px;
  }

  .pbc-viewer__focus-meta {
    margin: 7px 0 12px;
    font-size: 11px;
    text-align: left;
  }

  .pbc-viewer__filmstrip {
    grid-auto-columns: minmax(88px, 28%);
    grid-auto-flow: column;
    grid-template-columns: none;
    gap: 7px;
    padding: 3px 3px 7px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: x mandatory;
    scrollbar-color: var(--rule) transparent;
    scrollbar-width: thin;
  }

  .pbc-viewer__checkpoint {
    padding: 5px;
    scroll-snap-align: start;
  }

  .pbc-viewer__checkpoint-chip,
  .pbc-viewer__psnr,
  .pbc-viewer__best {
    font-size: 11px;
  }

  .pbc-viewer__controls {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr);
    gap: 6px;
    margin-top: 12px;
    padding-top: 12px;
  }

  .pbc-viewer__button {
    min-height: 32px;
    padding: 6px 10px;
    font-size: 11px;
  }

  .pbc-viewer__scrubber {
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1fr) 38px;
    width: 100%;
  }

  .pbc-viewer__percentage,
  .pbc-viewer__case-chip span,
  .pbc-viewer__loading {
    font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pbc-viewer__case-chip,
  .pbc-viewer__checkpoint,
  .pbc-viewer__button {
    transition: none;
  }

  .pbc-viewer__skeleton span,
  .pbc-viewer__focus-media.is-loading,
  .pbc-viewer__thumb-media.is-loading {
    animation: none;
  }
}