.act3 {
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
}

.act3__heading {
  font-size: var(--size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  text-align: center;
}

.act3__qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  opacity: 0;
}

.act3__qr-image {
  width: 200px;
  height: 200px;
}

.act3__qr-url {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
  font-family: monospace;
}

.act3__question {
  font-size: var(--size-xl);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  text-align: center;
  max-width: 800px;
  min-height: 3em;
  opacity: 0;
}

.act3__chart-container {
  width: 100%;
  max-width: 800px;
  height: 300px;
  position: relative;
  opacity: 0;
}

.act3__chart-container canvas {
  width: 100%;
  height: 100%;
}

.act3__controls {
  display: flex;
  gap: var(--space-sm);
}

.act3__simulated-label {
  font-size: var(--size-xs);
  color: var(--color-gray-500);
  font-style: italic;
  text-align: center;
}