/* block diagram editor — blocks reuse the flowchart node rect, which already takes the shared
   .dia-pick outline. A group renders as a composite cluster rect; make its hover/selection outline
   read clearly over the group fill (same relay idea as the mind map). */
.dia-block .flow-canvas rect.cluster.composite.dia-pick-hover {
  stroke: rgba(59, 110, 246, 0.5) !important;
  stroke-width: 2px !important;
}
.dia-block .flow-canvas rect.cluster.composite.dia-pick-sel {
  stroke: var(--accent, #3b6ef6) !important;
  stroke-width: 3px !important;
}