/* Utilities (small, single-purpose) */
.debug-layout .portStage { outline: 1px dashed rgba(0,0,0,.15); }
.debug-layout .card { position: relative; outline: 1px dashed rgba(0,0,0,.2); }
.debug-layout .card::after{
  content: attr(data-idx) " / span " attr(data-span) " / col " attr(data-colspan);
  position: absolute; top: 6px; left: 8px; padding: 2px 4px; border-radius: 3px;
  font: 600 11px/1 var(--sans); background: rgba(255,255,255,.75); color: #111;
}