.md-header {
  background-color: #263238; /* A dark blue-grey */
}

.version-badge {
  font-size: 0.7rem;
  font-weight: bold;
  background-color: #00bcd4; /* Cyan accent */
  color: white;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}