#sankey-container {
  width: 100%;
  min-height: 520px;
  height: calc(100vh - var(--header-height) - var(--footer-height) - 4rem);
}

.sankey-hint {
  margin: 0.5rem 0;
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.4;
}

.sankey-legend {
  margin-top: 1rem;
}

.sankey-legend h3 {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.sankey-layer-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.35rem 0;
  font-size: 0.8rem;
}

.sankey-layer-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}

.sankey-layer-swatch.layer-0 { background: var(--sankey-layer-0); }
.sankey-layer-swatch.layer-1 { background: var(--sankey-layer-1); }
.sankey-layer-swatch.layer-2 { background: var(--sankey-layer-2); }
.sankey-layer-swatch.layer-3 { background: var(--sankey-layer-3); }
.sankey-layer-swatch.layer-4 { background: var(--sankey-layer-4); }

.sankey-filter-banner {
  margin: 0.75rem 0;
  padding: 0.5rem 0.65rem;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--color-text);
}

.sankey-filter-banner strong {
  display: block;
  margin-bottom: 0.25rem;
}

.sankey-filter-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}