/* step_chart.css – styling for the D3 step chart tooltip */
.step-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
  max-width: 250px;
}

#step-chart {
  width: 100%;
  height: 500px;
  position: relative;
}