.demo-bar {
  position: sticky;
  top: 0;
  z-index: 80;
  margin: 0;
  padding: 0.5rem 1rem;
  background: #111;
  color: #d8d8d8;
  font: 14px/1.45 "Segoe UI", system-ui, sans-serif;
  text-align: center;
  border-bottom: 1px solid #2a2a2a;
}
.demo-bar a {
  color: #7dff6a;
  text-decoration: none;
  font-weight: 650;
}
.demo-bar a:hover { text-decoration: underline; }
.demo-bar strong { color: #fff; font-weight: 650; }