.demo-basic {
  --demo-primary: #3498db;
  --demo-secondary: #2ecc71;
  --demo-spacing: 12px;
}

.demo-card {
  background: linear-gradient(135deg, var(--demo-primary), var(--demo-secondary));
  color: white;
  padding: var(--demo-spacing);
  border-radius: var(--demo-spacing);
  margin: var(--demo-spacing) 0;
  text-align: center;
  transition: all 0.3s ease;
}

.demo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}