.background-source {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  padding: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--workspace-bg);
}

.background-source img {
  display: block;
  max-width: 100%;
  max-height: 58vh;
  border-radius: var(--r-sm);
}

.background-model-note {
  margin: 16px 0 0;
}

.background-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.background-status {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
}

.background-status__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: .84rem;
  font-weight: 600;
}

.background-status .btn {
  margin-top: 14px;
}

.background-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.background-result__head h2 {
  font-size: 1.25rem;
}

.background-compare {
  position: relative;
  width: 100%;
  min-height: 320px;
  max-height: 70vh;
  aspect-ratio: var(--result-aspect, 4 / 3);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background-color: var(--checker-bg);
}

.background-compare__image {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  user-select: none;
  pointer-events: none;
}

.background-compare__before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 50%;
  overflow: hidden;
}

.background-compare__before .background-compare__image {
  width: var(--compare-width, 100%);
  max-width: none;
}

.background-compare__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--accent);
  transform: translateX(-1px);
  pointer-events: none;
}

.background-compare__divider::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 28px;
  height: 28px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--surface);
  transform: translate(-50%, -50%);
}

.background-compare__range {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
}

.background-compare__labels {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 600;
}

@media (max-width: 600px) {
  .background-source,
  .background-compare {
    min-height: 220px;
  }

  .background-result__head {
    align-items: stretch;
    flex-direction: column;
  }

  .background-result__head .btn,
  .background-actions .btn {
    width: 100%;
  }
}