.loading_chart {
  text-align: center;
  font-size: 1.2em;
  color: #666;
  margin: 20px 0;
}

.tooltip {
  position: absolute;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 8px;
  border-radius: 4px;
  font-size: 12px;
  pointer-events: none;
  z-index: 1000;
}

#chart {
  width: 100%;
  height: auto;
}

.comparison-legend {
  display: flex;
  gap: 20px;
  margin-bottom: 10px;
  font-size: 14px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 2px;
}