/* docs/DESIGN_SYSTEM_V2.md Section 6: deliberate empty-state treatment
   for a histogram bucket range with zero data, rather than a bare
   near-blank axis. Positioned via chart-panel.css's
   .chart-panel__canvas-wrap, a sibling wrapper introduced only when
   this overlay is present -- never a child of .chart-panel__canvas
   itself (see chart-panel.js's own comment on why). */

.histogram-panel__empty-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--color-surface) 85%, transparent);
}