/* Canvas subsystem layout and interaction states. */

.canvas-scroll {
  position: relative;
  overscroll-behavior: contain;
}

.canvas-scroll.is-connecting::before {
  content: attr(data-connection-guide);
  position: sticky;
  top: 0.7rem;
  left: 50%;
  z-index: 35;
  display: block;
  width: max-content;
  max-width: min(34rem, calc(100% - 2rem));
  margin: 0 auto -2.5rem;
  padding: 0.52rem 0.78rem;
  border: 1px solid #9ac8d6;
  border-radius: 999px;
  background: rgba(240, 249, 252, 0.97);
  color: #164e63;
  box-shadow: 0 5px 16px rgba(18, 61, 74, 0.16);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
  pointer-events: none;
}

.canvas-space {
  display: flow-root;
  position: relative;
  min-width: 100%;
  min-height: 100%;
}

.canvas-board {
  position: absolute;
  top: 0;
  left: 0;
  will-change: transform;
  user-select: none;
}

.canvas-board :is(input, textarea, [contenteditable="true"]) {
  user-select: text;
}

.canvas-controls {
  position: sticky;
  top: 0.65rem;
  right: 0.65rem;
  z-index: 20;
  display: flex;
  width: max-content;
  align-items: center;
  gap: 0.16rem;
  margin: 0.42rem 0.42rem 0 auto;
  padding: 0.2rem;
  border: 1px solid #cfdfe8;
  border-radius: 0.45rem;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 3px 11px rgba(23, 42, 24, 0.12);
}

.canvas-controls button {
  min-width: 1.55rem;
  min-height: 1.55rem;
  padding: 0.15rem 0.28rem;
  border-radius: 0.35rem;
  font-size: 0.68rem;
  line-height: 1;
}

.canvas-controls output {
  min-width: 2.1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.64rem;
  font-variant-numeric: tabular-nums;
}

.canvas-scroll.is-space-pan,
.canvas-scroll.is-panning {
  cursor: grab;
}

.canvas-scroll.is-panning { cursor: grabbing; user-select: none; }

.flow-node:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .canvas-scroll { scroll-behavior: auto; }
  .flow-node, .edge-path { transition: none !important; }
}

/* Keep the in-progress connection above even the raised canvas cards. */
.connection-preview-layer {
  position: absolute;
  inset: 0;
  z-index: 15;
  overflow: visible;
  pointer-events: none;
}

/* In connection mode only compatible ports are interactive. The card remains
   hit-testable so hovering anywhere on a valid destination can snap to it. */
.canvas-scroll.is-connecting .flow-node { cursor: default; }
.canvas-scroll.is-connecting .flow-node * { pointer-events: none; }
.canvas-scroll.is-connecting .node-port.is-compatible-target { pointer-events: auto; }
.canvas-scroll.is-connecting .flow-node.is-compatible-link-target { cursor: crosshair; }