.demo-grid {
  display: grid;
  gap: 1rem;
  margin: 1rem 0;
}

.demo-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1.5rem;
  border-radius: 8px;
  text-align: center;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

@media (min-width: 576px) {
  .demo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .demo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .demo-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}