.demo-controls {
  margin-bottom: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.demo-controls select {
  padding: 8px;
  border: 1px solid #ced4da;
  border-radius: 4px;
  background: white;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 10px;
  height: 250px;
  background: #f8f9fa;
  border: 2px dashed #6c757d;
  place-items: center;
  transition: all 0.3s ease;
}

.demo-item {
  background: linear-gradient(45deg, #007bff, #0056b3);
  color: white;
  padding: 10px;
  text-align: center;
  border-radius: 4px;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.current-value {
  background: #e7f3ff;
  padding: 10px;
  border-radius: 4px;
  margin-top: 10px;
  font-family: monospace;
  border: 1px solid #b8daff;
}