.charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.chart-container h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}

.charts > .empty-message {
  grid-column: 1 / -1;
  color: var(--color-text-muted);
  text-align: center;
  padding: 2rem;
}

.pain-tooltip {
  background: var(--color-card, #fff);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius, 6px);
  padding: 0.375rem 0.625rem;
  font-size: 0.8rem;
  line-height: 1.4;
}

.pain-tooltip p {
  margin: 0;
}

@media (max-width: 768px) {
  .charts {
    grid-template-columns: 1fr;
  }
}