.has-tooltip { cursor: help; }

.chart-tooltip {
  position: fixed;
  z-index: 1000;
  max-width: min(300px, calc(100vw - 24px));
  padding: 9px 11px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 9px;
  background: #171a22;
  color: #fff;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .28);
  font: 600 .78rem/1.35 system-ui, sans-serif;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 100ms ease, transform 100ms ease;
}

.chart-tooltip[data-open="true"] { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .chart-tooltip { transition: none; }
}