.demo-comprehensive {
  color: #8e44ad;
  padding: 1.5rem;
  border: 2px solid currentColor;
  border-radius: 0.5rem;
  box-shadow: 0 4px 8px rgba(142, 68, 173, 0.3);
  text-shadow: 1px 1px 2px currentColor;
  background: linear-gradient(45deg, transparent, rgba(142, 68, 173, 0.1));
  transition: all 0.3s ease;
  text-align: center;
  font-weight: bold;
}
.demo-comprehensive::before {
  content: "●";
  color: currentColor;
  font-size: 1.5em;
  margin-right: 0.5rem;
}
.demo-comprehensive:hover {
  color: #f39c12;
  transform: translateY(-2px);
}