#payoffChart,
#valueChart {
  width: 100%;
  height: 420px;
}

.chart-card {
  margin-top: 1.5rem;
}

@media (max-width: 768px) {
  #payoffChart,
  #valueChart {
    height: 360px;
  }
}



.chart-description {
  max-width: 850px;
  margin-bottom: 1.2rem;
  line-height: 1.6;
  opacity: 0.85;
}

.greek-chart-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.mini-chart-card {
  border: 1px solid var(--global-border-color);
  border-radius: 14px;
  padding: 0.9rem;
  background: var(--global-bg-color);
}

.mini-chart-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.mini-plot {
  width: 100%;
  height: 260px;
}

#payoffChart {
  width: 100%;
  height: 420px;
}

@media (max-width: 1100px) {
  .greek-chart-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

  .mini-plot {
    height: 300px;
  }

  #payoffChart {
    height: 360px;
  }
}