/* ============================================================
   Node Editor — Atlantist Visual Scripting
   LIBER dark cinematic theme
   ============================================================ */

:root {
  --ne-bg: #0a0a0f;
  --ne-canvas: #0d0d14;
  --ne-panel: #13131c;
  --ne-panel-header: #181824;
  --ne-border: #1e1e2e;
  --ne-border-bright: #2a2a40;

  --ne-geometry: #00d4ff;
  --ne-constraint: #ffd700;
  --ne-structure: #c084fc;
  --ne-mep: #4aad6e;
  --ne-energy: #f59e0b;
  --ne-simulation: #ef4444;
  --ne-data: #60a5fa;
  --ne-design: #f472b6;

  --ne-number: #fb923c;
  --ne-boolean: #facc15;
  --ne-vector: #a78bfa;
  --ne-geometry-socket: #00d4ff;
  --ne-string: #34d399;
  --ne-struct: #c084fc;

  --ne-node-bg: #111118;
  --ne-node-selected: rgba(0, 212, 255, 0.12);
  --ne-node-header: #0a0a10;

  --ne-text: #e2e2f0;
  --ne-text-dim: #6b6b8a;
  --ne-text-muted: #4a4a65;

  --ne-zoom-min: 0.25;
  --ne-zoom-max: 4.0;
}

/* ── Modal Overlay ────────────────────────────────────────────── */
#node-editor-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  flex-direction: row;
}

#node-editor-overlay.open {
  display: flex;
}

/* ── Node Palette (left panel) ────────────────────────────────── */
#ne-palette {
  width: 280px;
  min-width: 280px;
  background: var(--ne-panel);
  border-right: 1px solid var(--ne-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#ne-palette-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--ne-border);
  background: var(--ne-panel-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

#ne-palette-header h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--ne-text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

#ne-palette-search {
  padding: 8px 10px;
  border-bottom: 1px solid var(--ne-border);
  flex-shrink: 0;
}

#ne-search-input {
  width: 100%;
  padding: 7px 10px 7px 32px;
  background: var(--ne-bg);
  border: 1px solid var(--ne-border);
  border-radius: 6px;
  color: var(--ne-text);
  font-size: 12px;
  outline: none;
  transition: border-color 0.15s;
}

#ne-search-input:focus {
  border-color: var(--ne-geometry);
}

#ne-search-input::placeholder {
  color: var(--ne-text-muted);
}

#ne-search-wrap {
  position: relative;
}

#ne-search-wrap::before {
  content: '⌘F';
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  color: var(--ne-text-muted);
  pointer-events: none;
}

#ne-palette-body {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

/* Scrollbar */
#ne-palette-body::-webkit-scrollbar { width: 4px; }
#ne-palette-body::-webkit-scrollbar-track { background: transparent; }
#ne-palette-body::-webkit-scrollbar-thumb { background: var(--ne-border-bright); border-radius: 2px; }

.ne-category {
  margin-bottom: 4px;
}

.ne-category-header {
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  transition: background 0.1s;
}

.ne-category-header:hover {
  background: rgba(255,255,255,0.04);
}

.ne-category-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.ne-category-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--ne-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex: 1;
}

.ne-category-count {
  font-size: 10px;
  color: var(--ne-text-muted);
  background: var(--ne-border);
  padding: 1px 5px;
  border-radius: 8px;
}

.ne-category-arrow {
  font-size: 10px;
  color: var(--ne-text-muted);
  transition: transform 0.2s;
}

.ne-category.collapsed .ne-category-arrow {
  transform: rotate(-90deg);
}

.ne-category-items {
  padding: 2px 0 6px;
}

.ne-category.collapsed .ne-category-items {
  display: none;
}

.ne-node-item {
  padding: 6px 14px 6px 28px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: grab;
  transition: background 0.1s;
  border-radius: 0;
}

.ne-node-item:hover {
  background: rgba(255,255,255,0.06);
}

.ne-node-item:active {
  cursor: grabbing;
}

.ne-node-item-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
}

.ne-node-item-name {
  font-size: 12px;
  color: var(--ne-text);
}

.ne-node-item-desc {
  font-size: 10px;
  color: var(--ne-text-muted);
  margin-left: auto;
}

/* ── Canvas ──────────────────────────────────────────────────── */
#ne-canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--ne-canvas);
}

#ne-canvas {
  position: absolute;
  inset: 0;
  cursor: crosshair;
}

/* Canvas background grid */
#ne-canvas::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--ne-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--ne-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.25;
  pointer-events: none;
}

/* Zoom indicator */
#ne-zoom-indicator {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(0,0,0,0.6);
  border: 1px solid var(--ne-border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 11px;
  color: var(--ne-text-dim);
  font-family: var(--font-mono);
  pointer-events: none;
  z-index: 10;
}

/* Minimap */
#ne-minimap {
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 160px;
  height: 100px;
  background: rgba(0,0,0,0.6);
  border: 1px solid var(--ne-border);
  border-radius: 6px;
  overflow: hidden;
  z-index: 10;
}

#ne-minimap-canvas {
  width: 100%;
  height: 100%;
}

#ne-minimap-viewport {
  position: absolute;
  border: 1px solid var(--ne-geometry);
  background: rgba(0, 212, 255, 0.1);
  pointer-events: none;
}

/* ── Topbar Toolbar ──────────────────────────────────────────── */
#ne-toolbar {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(13, 13, 20, 0.9);
  border: 1px solid var(--ne-border);
  border-radius: 8px;
  padding: 4px 6px;
  z-index: 10;
  backdrop-filter: blur(8px);
}

.ne-tool-btn {
  background: transparent;
  border: none;
  color: var(--ne-text-dim);
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font);
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 5px;
}

.ne-tool-btn:hover {
  background: rgba(255,255,255,0.08);
  color: var(--ne-text);
}

.ne-tool-btn.active {
  background: rgba(0, 212, 255, 0.15);
  color: var(--ne-geometry);
}

.ne-tool-sep {
  width: 1px;
  height: 20px;
  background: var(--ne-border);
  margin: 0 2px;
}

/* ── Connection Canvas (SVG) ─────────────────────────────────── */
#ne-connections {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.ne-connection-path {
  fill: none;
  stroke-width: 2;
  pointer-events: stroke;
  cursor: pointer;
}

.ne-connection-path:hover {
  stroke-width: 3;
}

.ne-wire-geometry { stroke: var(--ne-geometry); }
.ne-wire-number { stroke: var(--ne-number); }
.ne-wire-boolean { stroke: var(--ne-boolean); }
.ne-wire-vector { stroke: var(--ne-vector); }
.ne-wire-struct { stroke: var(--ne-struct); }
.ne-wire-string { stroke: var(--ne-string); }
.ne-wire-default { stroke: #888; }

.ne-wire-preview {
  stroke-dasharray: 6 4;
  opacity: 0.7;
}

.ne-wire-error {
  stroke: #ef4444;
  stroke-dasharray: 4 4;
}

/* ── Nodes ───────────────────────────────────────────────────── */
.ne-node {
  position: absolute;
  background: var(--ne-node-bg);
  border: 1px solid var(--ne-border);
  border-radius: 6px;
  min-width: 180px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  user-select: none;
  transition: box-shadow 0.15s, border-color 0.15s;
}

.ne-node:hover {
  border-color: var(--ne-border-bright);
}

.ne-node.selected {
  border-color: var(--ne-geometry);
  box-shadow: 0 0 0 1px var(--ne-geometry), 0 4px 24px rgba(0,212,255,0.15);
}

.ne-node-header {
  padding: 8px 10px;
  border-radius: 5px 5px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: move;
}

.ne-node-category-badge {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 5px;
  border-radius: 3px;
  opacity: 0.9;
}

.ne-node-title {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  flex: 1;
}

.ne-node-help {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.5);
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}

.ne-node-help:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.ne-node-close {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  background: transparent;
  color: rgba(255,255,255,0.4);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.ne-node-close:hover {
  background: rgba(239,68,68,0.3);
  color: #ef4444;
}

.ne-node-body {
  padding: 0 0 8px;
}

.ne-node-ports {
  display: flex;
}

.ne-node-ports-left,
.ne-node-ports-right {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.ne-node-ports-left {
  padding-right: 6px;
}

.ne-node-ports-right {
  padding-left: 6px;
  margin-left: auto;
}

.ne-port-row {
  display: flex;
  align-items: center;
  padding: 3px 8px;
  gap: 6px;
  min-height: 22px;
}

.ne-port-row:hover {
  background: rgba(255,255,255,0.03);
}

.ne-port {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid;
  cursor: crosshair;
  transition: transform 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
  position: relative;
}

.ne-port.input {
  margin-left: -5px;
}

.ne-port.output {
  margin-right: -5px;
}

.ne-port:hover,
.ne-port.highlight {
  transform: scale(1.5);
  box-shadow: 0 0 6px currentColor;
}

.ne-port-connected {
  background: currentColor;
}

.ne-port-label {
  font-size: 11px;
  color: var(--ne-text-dim);
  flex: 1;
}

.ne-port-type-label {
  font-size: 9px;
  color: var(--ne-text-muted);
  font-family: var(--font-mono);
}

.ne-port-value {
  font-size: 10px;
  color: var(--ne-text-muted);
  font-family: var(--font-mono);
  background: var(--ne-border);
  padding: 1px 5px;
  border-radius: 3px;
  cursor: text;
  min-width: 30px;
  text-align: right;
}

.ne-port-value:hover {
  background: var(--ne-border-bright);
}

/* Preview badge */
.ne-node-preview {
  position: absolute;
  top: -8px;
  right: 12px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid;
}

.ne-node-preview.valid { background: #4aad6e; border-color: #4aad6e; }
.ne-node-preview.warning { background: #f59e0b; border-color: #f59e0b; }
.ne-node-preview.error { background: #ef4444; border-color: #ef4444; }

/* Category colors */
.ne-node[data-cat="geometry"] .ne-node-header { background: rgba(0, 212, 255, 0.12); border-bottom: 1px solid rgba(0,212,255,0.2); }
.ne-node[data-cat="geometry"] .ne-node-category-badge { background: rgba(0,212,255,0.2); color: var(--ne-geometry); }
.ne-node[data-cat="constraint"] .ne-node-header { background: rgba(255, 215, 0, 0.1); border-bottom: 1px solid rgba(255,215,0,0.2); }
.ne-node[data-cat="constraint"] .ne-node-category-badge { background: rgba(255,215,0,0.2); color: var(--ne-constraint); }
.ne-node[data-cat="structure"] .ne-node-header { background: rgba(192,132,252,0.1); border-bottom: 1px solid rgba(192,132,252,0.2); }
.ne-node[data-cat="structure"] .ne-node-category-badge { background: rgba(192,132,252,0.2); color: var(--ne-structure); }
.ne-node[data-cat="mep"] .ne-node-header { background: rgba(74,173,110,0.1); border-bottom: 1px solid rgba(74,173,110,0.2); }
.ne-node[data-cat="mep"] .ne-node-category-badge { background: rgba(74,173,110,0.2); color: var(--ne-mep); }
.ne-node[data-cat="energy"] .ne-node-header { background: rgba(245,158,11,0.1); border-bottom: 1px solid rgba(245,158,11,0.2); }
.ne-node[data-cat="energy"] .ne-node-category-badge { background: rgba(245,158,11,0.2); color: var(--ne-energy); }
.ne-node[data-cat="simulation"] .ne-node-header { background: rgba(239,68,68,0.1); border-bottom: 1px solid rgba(239,68,68,0.2); }
.ne-node[data-cat="simulation"] .ne-node-category-badge { background: rgba(239,68,68,0.2); color: var(--ne-simulation); }
.ne-node[data-cat="data"] .ne-node-header { background: rgba(96,165,250,0.1); border-bottom: 1px solid rgba(96,165,250,0.2); }
.ne-node[data-cat="data"] .ne-node-category-badge { background: rgba(96,165,250,0.2); color: var(--ne-data); }
.ne-node[data-cat="design"] .ne-node-header { background: rgba(244,114,182,0.1); border-bottom: 1px solid rgba(244,114,182,0.2); }
.ne-node[data-cat="design"] .ne-node-category-badge { background: rgba(244,114,182,0.2); color: var(--ne-design); }

/* Port type colors */
.ne-port-type-number { color: var(--ne-number); }
.ne-port-type-boolean { color: var(--ne-boolean); }
.ne-port-type-vector { color: var(--ne-vector); }
.ne-port-type-geometry { color: var(--ne-geometry-socket); }
.ne-port-type-string { color: var(--ne-string); }
.ne-port-type-struct { color: var(--ne-struct); }
.ne-port-type-any { color: #888; }

/* Inline parameter fields */
.ne-node-params {
  padding: 4px 10px;
}

.ne-param-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 0;
}

.ne-param-label {
  font-size: 11px;
  color: var(--ne-text-dim);
  min-width: 60px;
}

.ne-param-input {
  flex: 1;
  background: var(--ne-bg);
  border: 1px solid var(--ne-border);
  border-radius: 4px;
  color: var(--ne-text);
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 3px 6px;
  outline: none;
  transition: border-color 0.15s;
}

.ne-param-input:focus {
  border-color: var(--ne-geometry);
}

/* ── Help tooltip ────────────────────────────────────────────── */
#ne-help-tooltip {
  position: fixed;
  background: var(--ne-node-bg);
  border: 1px solid var(--ne-border-bright);
  border-radius: 8px;
  padding: 12px 16px;
  max-width: 280px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
  z-index: 600;
  display: none;
}

#ne-help-tooltip.visible {
  display: block;
}

#ne-help-tooltip h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--ne-text);
  margin-bottom: 6px;
}

#ne-help-tooltip p {
  font-size: 12px;
  color: var(--ne-text-dim);
  line-height: 1.6;
}

#ne-help-tooltip .ne-port-type-list {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

#ne-help-tooltip .ne-port-chip {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
}

/* ── Node Editor Close Button ────────────────────────────────── */
#ne-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: rgba(13,13,20,0.8);
  border: 1px solid var(--ne-border);
  border-radius: 6px;
  color: var(--ne-text-dim);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  z-index: 10;
}

#ne-close:hover {
  background: rgba(239,68,68,0.2);
  border-color: #ef4444;
  color: #ef4444;
}

/* ── Context menu ────────────────────────────────────────────── */
#ne-context-menu {
  position: fixed;
  background: var(--ne-node-bg);
  border: 1px solid var(--ne-border-bright);
  border-radius: 6px;
  padding: 4px 0;
  min-width: 160px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  z-index: 550;
  display: none;
}

#ne-context-menu.visible {
  display: block;
}

.ne-ctx-item {
  padding: 7px 14px;
  font-size: 12px;
  color: var(--ne-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.1s;
}

.ne-ctx-item:hover {
  background: rgba(255,255,255,0.08);
}

.ne-ctx-item.danger:hover {
  background: rgba(239,68,68,0.15);
  color: #ef4444;
}

.ne-ctx-sep {
  height: 1px;
  background: var(--ne-border);
  margin: 4px 0;
}

/* ── Zoom controls ────────────────────────────────────────────── */
#ne-zoom-controls {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(13,13,20,0.9);
  border: 1px solid var(--ne-border);
  border-radius: 6px;
  padding: 3px;
  z-index: 10;
}

.ne-zoom-btn {
  width: 28px;
  height: 26px;
  background: transparent;
  border: none;
  color: var(--ne-text-dim);
  font-size: 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.15s;
}

.ne-zoom-btn:hover {
  background: rgba(255,255,255,0.08);
  color: var(--ne-text);
}

/* ── Empty state ─────────────────────────────────────────────── */
#ne-empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  pointer-events: none;
}

#ne-empty-state svg {
  opacity: 0.15;
}

#ne-empty-state p {
  font-size: 14px;
  color: var(--ne-text-muted);
  text-align: center;
}

#ne-empty-state span {
  font-size: 11px;
  color: var(--ne-text-muted);
  opacity: 0.6;
}

/* ── Right Properties Panel ──────────────────────────────────── */
#ne-properties {
  width: 260px;
  min-width: 260px;
  background: var(--ne-panel);
  border-left: 1px solid var(--ne-border);
  display: none;
  flex-direction: column;
  overflow: hidden;
}

#ne-properties.open {
  display: flex;
}

#ne-props-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--ne-border);
  background: var(--ne-panel-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

#ne-props-header h3 {
  font-size: 12px;
  font-weight: 700;
  color: var(--ne-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#ne-props-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
}

.ne-prop-section {
  margin-bottom: 16px;
}

.ne-prop-section-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--ne-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.ne-prop-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.ne-prop-row label {
  font-size: 11px;
  color: var(--ne-text-dim);
  min-width: 70px;
}

.ne-prop-row input,
.ne-prop-row select {
  flex: 1;
  background: var(--ne-bg);
  border: 1px solid var(--ne-border);
  border-radius: 4px;
  color: var(--ne-text);
  font-size: 11px;
  padding: 4px 6px;
  outline: none;
}

.ne-prop-row input:focus,
.ne-prop-row select:focus {
  border-color: var(--ne-geometry);
}

.ne-props-conn-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ne-props-conn-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: var(--ne-bg);
  border-radius: 4px;
  font-size: 11px;
  color: var(--ne-text-dim);
}

/* ── Responsive (iPad 768px) ───────────────────────────────────── */
@media (max-width: 768px) {
  #ne-palette {
    width: 220px;
    min-width: 220px;
  }
  #ne-properties {
    width: 200px;
    min-width: 200px;
  }
  .ne-node {
    min-width: 160px;
  }
}

/* ── Responsive (iPad portrait 375px) ────────────────────────── */
@media (max-width: 400px) {
  #ne-palette {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.25s;
  }
  #ne-palette.open {
    transform: translateX(0);
  }
  #ne-properties {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 20;
    transform: translateX(100%);
    transition: transform 0.25s;
  }
  #ne-properties.open {
    transform: translateX(0);
  }
  .ne-node {
    min-width: 140px;
  }
  #ne-minimap {
    display: none;
  }
}

/* ── Watch node inline value display ──────────────────────── */
.ne-watch-display {
  margin: 6px 10px 6px;
  padding: 6px 10px;
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.22);
  border-radius: 4px;
  color: var(--ne-geometry);
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  min-height: 28px;
  word-break: break-all;
  transition: background 0.2s;
}

.ne-watch-display.ne-watch-empty {
  color: var(--ne-text-muted);
  border-color: var(--ne-border);
  background: transparent;
}

/* Number node: wider value field */
.ne-node[data-node-type="ne_number"] .ne-param-input {
  width: 100%;
  font-size: 15px;
  font-weight: 600;
  color: var(--ne-number);
  text-align: center;
}

/* ── Execute button — stands out from the rest of the toolbar ── */
.ne-execute-btn {
  background: linear-gradient(135deg, #22c55e, #16a34a) !important;
  color: #fff !important;
  border-radius: 6px !important;
  padding: 4px 14px !important;
  font-weight: 600 !important;
  letter-spacing: 0.03em;
  box-shadow: 0 0 10px rgba(34,197,94,0.25);
  transition: opacity 0.15s, box-shadow 0.15s;
}
.ne-execute-btn:hover {
  opacity: 0.9;
  box-shadow: 0 0 18px rgba(34,197,94,0.45);
  background: linear-gradient(135deg, #22c55e, #16a34a) !important;
  color: #fff !important;
}
.ne-execute-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Node error state (highlighted when Execute finds evaluation errors) ── */
.ne-node.ne-node-error {
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 2px rgba(239,68,68,0.4), 0 4px 24px rgba(0,0,0,0.5) !important;
}
.ne-node-exec-error {
  font-size: 10px;
  color: #fca5a5;
  padding: 4px 8px 6px;
  background: rgba(239,68,68,0.12);
  border-top: 1px solid rgba(239,68,68,0.3);
  border-radius: 0 0 8px 8px;
  line-height: 1.4;
  word-break: break-word;
}