/* Global reset and base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: clamp(13px, 1.5vh, 18px);
}

body {
  background: #0f1117;
  color: #e2e8f0;
  font-family: system-ui, 'Segoe UI', Roboto, sans-serif;
  overflow: hidden;
}

#app {
  width: 100%;
  max-width: none;
  margin: 0;
  text-align: left;
  border: none;
  min-height: 100vh;
}

/* ── Connection banner ─────────────────────────────────────────────────── */

.connection-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #7f1d1d;
  color: #fca5a5;
  text-align: center;
  font-size: 0.8rem;
  padding: 0.3rem 1rem;
}

/* ── ViewMode ──────────────────────────────────────────────────────────── */

.view-mode {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  background: #0f1117;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  height: 2.75rem;
  background: #1a1f2e;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
  gap: 1rem;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: 1;
}

.toolbar-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 1;
  justify-content: flex-end;
}

.app-name {
  font-size: 1rem;
  font-weight: 800;
  color: #60a5fa;
  letter-spacing: -0.5px;
}

.iface-name {
  font-size: 0.85rem;
  color: #94a3b8;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.parse-error {
  font-size: 0.78rem;
  color: #f87171;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
}

.status-chip {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  background: #1e293b;
  color: #94a3b8;
  border: 1px solid #334155;
  text-transform: capitalize;
  white-space: nowrap;
  flex-shrink: 0;
}

.status-chip.connected {
  background: #14532d;
  color: #86efac;
  border-color: #166534;
}

.status-chip.disconnected {
  background: #7f1d1d;
  color: #fca5a5;
  border-color: #991b1b;
}

.status-chip.connecting {
  background: #1e293b;
  color: #fbbf24;
  border-color: #92400e;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.btn-edit {
  background: #2d3748;
  border: none;
  color: #e2e8f0;
  font-size: 0.8rem;
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  cursor: pointer;
}

.btn-edit:hover {
  background: #374151;
}

/* ── User identity chip ──────────────────────────────────────────────────── */
/* ── Access denied screen ────────────────────────────────────────────────── */
.access-denied {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
  color: #e2e8f0;
  padding: 2rem;
}

.access-denied h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: #fca5a5;
}

.access-denied p {
  max-width: 32rem;
  color: #94a3b8;
}

.content {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* ── Bottom status bar (connection chip + panel context) ─────────────────── */
.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 1.6rem;
  padding: 0 0.75rem;
  background: #141925;
  border-top: 1px solid #2d3748;
  flex-shrink: 0;
  gap: 1rem;
  font-size: 0.72rem;
  color: #94a3b8;
}
.statusbar-left,
.statusbar-right { display: flex; align-items: center; gap: 0.6rem; min-width: 0; }
.statusbar-iface { color: #cbd5e1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.statusbar-muted { color: #64748b; }
.statusbar-hist { color: #fbbf24; }
.statusbar .status-chip { padding: 0.05rem 0.5rem; font-size: 0.7rem; }

/* ── Panel resize handle ─────────────────────────────────────────────────── */

.panel-resize-handle {
  width: 5px;
  flex-shrink: 0;
  background: transparent;
  cursor: ew-resize;
  position: relative;
  z-index: 10;
  transition: background 0.15s;
}
.panel-resize-handle:hover,
.panel-resize-handle.dragging {
  background: #4a9eff55;
}

/* ── EditMode ──────────────────────────────────────────────────────────── */

.edit-mode {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100%;
  background: #0f1117;
  color: #475569;
  font-size: 1.1rem;
}

/* ── InterfaceList panel ───────────────────────────────────────────────── */

.panel {
  width: 260px;
  min-width: 260px;
  background: #1a1f2e;
  border-right: 1px solid #2d3748;
  display: flex;
  flex-direction: column;
  transition: width 0.2s ease, min-width 0.2s ease;
  overflow: hidden;
}

.panel.collapsed {
  width: 40px;
  min-width: 40px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.5rem 0.5rem 0.75rem;
  border-bottom: 1px solid #2d3748;
  min-height: 2.5rem;
  flex-shrink: 0;
}

.panel.collapsed .panel-header {
  justify-content: center;
  padding: 0.5rem;
}

.panel-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.icon-btn {
  background: none;
  border: none;
  color: #64748b;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  line-height: 1;
}

.icon-btn:hover {
  background: #2d3748;
  color: #e2e8f0;
}

.panel-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.panel-btn {
  flex: 1;
  background: #2d3748;
  border: none;
  color: #e2e8f0;
  font-size: 0.78rem;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}

.panel-btn:hover {
  background: #374151;
}

.panel-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0;
}

.hint {
  color: #475569;
  font-size: 0.8rem;
  padding: 0.75rem 0.75rem;
  line-height: 1.5;
}

.iface-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.iface-item {
  padding: 0.5rem 0.75rem;
  color: #cbd5e1;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 3px;
  margin: 1px 4px;
}

.iface-item:hover {
  background: #2d3748;
  color: #e2e8f0;
}

/* ── Canvas ────────────────────────────────────────────────────────────── */

.canvas-container {
  flex: 1;
  position: relative;
  overflow: auto;
  background: #0f1117;
  min-width: 0;
}

.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #475569;
  font-size: 0.95rem;
  text-align: center;
  padding: 2rem;
}

.canvas-area {
  position: relative;
  /* width/height set inline from interface dimensions */
}

/* View mode: widgets shed their card chrome (border/background/shadow) so they
   blend with the canvas background. Edit mode (EditCanvas) keeps the chrome so
   widgets stay visible and selectable. Internal elements (gauge arc, bar track,
   plot chart, inputs) keep their own styling. */
.canvas-view-bare .textview,
.canvas-view-bare .gauge,
.canvas-view-bare .barh,
.canvas-view-bare .barv,
.canvas-view-bare .led-widget,
.canvas-view-bare .multiled-widget,
.canvas-view-bare .setvalue,
.canvas-view-bare .toggle-widget,
.canvas-view-bare .plot-widget {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
}

/* ── TextLabel widget ──────────────────────────────────────────────────────── */

.textlabel {
  position: absolute;
  display: flex;
  align-items: center;
  overflow: hidden;
  box-sizing: border-box;
  font-size: 0.9rem;
  color: #e2e8f0;
  font-family: system-ui, sans-serif;
  white-space: nowrap;
}

/* Overlay shown over a widget disabled via action.widget logic: dims it and
   blocks interaction while still surfacing the right-click context menu. */
.widget-disable-overlay {
  position: absolute;
  z-index: 10;
  background: rgba(20, 25, 35, 0.45);
  cursor: not-allowed;
  box-sizing: border-box;
}

/* ── Unknown widget ────────────────────────────────────────────────────────── */

.unknown-widget {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1e2535;
  border: 1px dashed #3d4f6e;
  border-radius: 4px;
  box-sizing: border-box;
}

.unknown-label {
  color: #475569;
  font-size: 0.75rem;
  font-family: ui-monospace, monospace;
}

/* ── Context Menu ──────────────────────────────────────────────────────── */

.ctx-menu {
  position: fixed;
  z-index: 9000;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  min-width: 180px;
  padding: 4px 0;
  font-family: system-ui, sans-serif;
}

.ctx-item {
  display: block;
  width: 100%;
  background: none;
  border: none;
  color: #cbd5e1;
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
}

.ctx-item:hover {
  background: #2d3748;
  color: #e2e8f0;
}

.ctx-divider {
  height: 1px;
  background: #2d3748;
  margin: 4px 0;
}

.ctx-signal-info {
  padding: 0.3rem 0.9rem;
  font-size: 0.75rem;
  color: #475569;
  font-family: ui-monospace, monospace;
}

/* ── Widgets — shared ──────────────────────────────────────────────────── */

.quality-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── TextView widget ───────────────────────────────────────────────────── */

.textview {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.4em;
  padding: 0 0.6em;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 4px;
  overflow: hidden;
  box-sizing: border-box;
  white-space: nowrap;
}

.textview .label {
  color: #94a3b8;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.textview .value {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.9rem;
  color: #e2e8f0;
  min-width: 4ch;
}

.textview .unit {
  color: #64748b;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* ── Gauge widget ──────────────────────────────────────────────────────── */

.gauge {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  overflow: hidden;
  font-family: system-ui, sans-serif;
  padding: 4px;
}

.gauge .quality-dot {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.gauge-svg {
  width: 100%;
  flex: 1;
}

.gauge-value {
  fill: #e2e8f0;
  font-size: 14px;
  font-family: ui-monospace, monospace;
}

.gauge-unit {
  fill: #64748b;
  font-size: 6px;
  font-family: system-ui, sans-serif;
}

.gauge-range {
  fill: #475569;
  font-size: 6px;
  font-family: system-ui, sans-serif;
}

.gauge-label {
  font-size: 0.75rem;
  color: #94a3b8;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
  padding: 0 4px;
  box-sizing: border-box;
}

/* ── BarH widget ───────────────────────────────────────────────────────── */

.barh {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: 3px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  padding: 6px 10px;
  font-family: system-ui, sans-serif;
  overflow: hidden;
}

.barh .quality-dot {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.barh .bar-label {
  font-size: 0.75rem;
  color: #94a3b8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.barh .bar-track {
  width: 100%;
  height: 12px;
  background: #2d3748;
  border-radius: 3px;
  overflow: hidden;
}

.barh .bar-fill {
  height: 100%;
  background: #4a9eff;
  border-radius: 3px;
  transition: width 0.15s ease;
}

.barh .bar-value {
  display: flex;
  gap: 4px;
  align-items: baseline;
  justify-content: flex-end;
}

.barh .value {
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  color: #e2e8f0;
}

.barh .unit {
  font-size: 0.7rem;
  color: #64748b;
}

/* ── BarV widget ───────────────────────────────────────────────────────── */

.barv {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 3px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  padding: 6px 8px;
  font-family: system-ui, sans-serif;
  overflow: hidden;
}

.barv .quality-dot {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.barv .bar-label {
  font-size: 0.75rem;
  color: #94a3b8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
  text-align: center;
}

.barv .bar-value {
  display: flex;
  gap: 3px;
  align-items: baseline;
}

.barv .value {
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  color: #e2e8f0;
}

.barv .unit {
  font-size: 0.7rem;
  color: #64748b;
}

.barv .bar-track {
  width: 24px;
  flex: 1;
  background: #2d3748;
  border-radius: 3px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.barv .bar-fill {
  width: 100%;
  background: #4a9eff;
  border-radius: 3px;
  transition: height 0.15s ease;
}

/* ── LED widget ────────────────────────────────────────────────────────── */

.led-widget {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  padding: 4px;
  font-family: system-ui, sans-serif;
  overflow: hidden;
}

.led-circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background 0.2s;
}

.led-circle.blink {
  animation: blink-slow 1.8s ease-in-out infinite;
}

@keyframes blink-slow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.led-label {
  font-size: 0.75rem;
  color: #94a3b8;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

/* ── MultiLed widget ───────────────────────────────────────────────────── */

.multiled-widget {
  position: absolute;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 4px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  padding: 6px;
  font-family: system-ui, sans-serif;
  overflow: hidden;
}

.bit-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 20px;
}

.multiled-widget .led-circle {
  width: 14px;
  height: 14px;
}

.bit-label {
  font-size: 0.6rem;
  color: #64748b;
  text-align: center;
  white-space: nowrap;
}

/* ── SetValue widget ───────────────────────────────────────────────────── */

.setvalue {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0 8px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  overflow: hidden;
  font-family: system-ui, sans-serif;
  white-space: nowrap;
}

.setvalue .quality-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.sv-label {
  color: #94a3b8;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.sv-input {
  width: 80px;
  background: #0f1117;
  border: 1px solid #3d4f6e;
  border-radius: 4px;
  color: #e2e8f0;
  font-size: 0.85rem;
  padding: 2px 5px;
  flex-shrink: 0;
  font-family: ui-monospace, monospace;
}

.sv-input:focus {
  outline: none;
  border-color: #4a9eff;
}

.sv-select {
  flex: 1;
  width: auto;
  cursor: pointer;
}

.sv-current {
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  color: #e2e8f0;
  flex-shrink: 0;
}

.sv-unit {
  font-size: 0.7rem;
  color: #64748b;
  flex-shrink: 0;
}

.sv-btn {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 3px 10px;
  font-size: 0.8rem;
  cursor: pointer;
  flex-shrink: 0;
  font-family: system-ui, sans-serif;
}

/* Config selector widget — a labelled combo of a config set's instances whose
   choice is written to a panel-local variable. */
.configselect {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 8px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  overflow: hidden;
  font-family: system-ui, sans-serif;
  white-space: nowrap;
}

.cs-label {
  color: #94a3b8;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.cs-select {
  flex: 1;
  width: auto;
  background: #0f1117;
  border: 1px solid #3d4f6e;
  border-radius: 4px;
  color: #e2e8f0;
  font-size: 0.85rem;
  padding: 2px 5px;
  cursor: pointer;
}

.cs-select:focus {
  outline: none;
  border-color: #4a9eff;
}

.sv-btn:hover {
  background: #1d4ed8;
}

.sv-btn:active {
  background: #1e40af;
}

/* Read-only: user lacks permission to write this signal (.sv-select shares
   .sv-input). */
.sv-input:disabled,
.sv-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.sv-btn:disabled:hover { background: #2563eb; }

/* ── Toggle switch widget ──────────────────────────────────────────────── */
.toggle-widget {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  overflow: hidden;
  font-family: system-ui, sans-serif;
  white-space: nowrap;
}
.toggle-label {
  color: #94a3b8;
  font-size: 0.8rem;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.toggle-switch {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
}
.toggle-track {
  position: relative;
  width: 34px;
  height: 18px;
  border-radius: 9999px;
  background: #3d4f6e;
  transition: background 0.15s;
  flex-shrink: 0;
}
.toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #e2e8f0;
  transition: transform 0.15s;
}
.toggle-on .toggle-track { background: #22c55e; }
.toggle-on .toggle-knob { transform: translateX(16px); }
.toggle-unknown .toggle-track { background: #4b5563; }
.toggle-state {
  font-size: 0.72rem;
  font-weight: 600;
  color: #94a3b8;
  min-width: 1.6rem;
  text-align: left;
}
.toggle-on .toggle-state { color: #86efac; }
.toggle-switch:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* ── Button widget ─────────────────────────────────────────────────────── */

.button-widget {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 4px;
}

.button-widget .btn {
  width: 100%;
  height: 100%;
  background: #1e3a5f;
  color: #e2e8f0;
  border: 1px solid #2d5a9e;
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: system-ui, sans-serif;
  cursor: pointer;
  transition: background 0.15s;
}

.button-widget .btn:hover {
  background: #2563eb;
  border-color: #3b82f6;
}

.button-widget .btn:active {
  background: #1d4ed8;
  transform: scale(0.97);
}

/* Read-only: user lacks permission to write this signal. */
.button-widget .btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.button-widget .btn:disabled:hover {
  background: #1e3a5f;
  border-color: #2d5a9e;
}
.button-widget .btn:disabled:active {
  transform: none;
}

/* ── ImageWidget ───────────────────────────────────────────────────────── */

.image-widget {
  position: absolute;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 4px;
  box-sizing: border-box;
  overflow: hidden;
}

.image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: #475569;
  font-size: 0.8rem;
}

/* ── LinkWidget ────────────────────────────────────────────────────────── */

.link-widget {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

.link-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  height: 100%;
  background: #1e293b;
  color: #60a5fa;
  border: 1px solid #334155;
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: system-ui, sans-serif;
  cursor: pointer;
  padding: 0 10px;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
}

.link-btn:hover {
  background: #1e3a5f;
  border-color: #3b82f6;
  color: #93c5fd;
}

.link-icon { font-size: 1rem; flex-shrink: 0; }
.link-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── PlotWidget ────────────────────────────────────────────────────────── */

.plot-widget {
  position: absolute;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-sizing: border-box;
  overflow: hidden;
  font-family: system-ui, sans-serif;
}

.chart-area {
  overflow: visible;
}

/* ── Plot hover toolbar (pause / window / clear / screenshot) ─────────────── */
.plot-toolbar {
  position: absolute;
  top: 4px;
  right: 4px;
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 2px 3px;
  background: rgba(15, 17, 23, 0.85);
  border: 1px solid #2d3748;
  border-radius: 5px;
  opacity: 0;
  transition: opacity 0.12s;
  pointer-events: none;
}
.plot-widget:hover .plot-toolbar { opacity: 1; pointer-events: auto; }
.plot-tb-btn {
  background: none;
  border: none;
  color: #cbd5e1;
  font-size: 0.8rem;
  line-height: 1;
  padding: 2px 5px;
  border-radius: 4px;
  cursor: pointer;
}
.plot-tb-btn:hover { background: #2d3748; }
.plot-tb-active { background: #2563eb; color: #fff; }
.plot-tb-active:hover { background: #1d4ed8; }
.plot-tb-select {
  background: #0f1117;
  border: 1px solid #3d4f6e;
  border-radius: 4px;
  color: #e2e8f0;
  font-size: 0.72rem;
  padding: 1px 3px;
  cursor: pointer;
}
.plot-tb-select:focus { outline: none; border-color: #4a9eff; }

/* ── Plot measurement readout (cursor A/B + Δt + per-series Δ) ─────────────── */
.measure-readout {
  position: absolute;
  top: 30px;
  left: 4px;
  z-index: 12;
  max-width: 70%;
  padding: 4px 6px;
  background: rgba(15, 17, 23, 0.9);
  border: 1px solid #2d3748;
  border-radius: 5px;
  font-size: 0.7rem;
  line-height: 1.35;
  color: #cbd5e1;
  pointer-events: auto;
}
.measure-row {
  display: flex;
  gap: 8px;
  justify-content: space-between;
  white-space: nowrap;
}
.measure-head {
  font-weight: 600;
  color: #e2e8f0;
  border-bottom: 1px solid #2d3748;
  margin-bottom: 2px;
  padding-bottom: 2px;
}
.measure-name {
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 9rem;
}
.measure-vals { color: #e2e8f0; }
.measure-delta { color: #94a3b8; }

/* uPlot dark overrides */
.chart-area .u-wrap { background: transparent; }
.chart-area .u-legend { color: #94a3b8; font-size: 0.75rem; }
.chart-area .u-value { color: #e2e8f0; }

/* Legend position for the uPlot (timeseries) chart. uPlot always renders its
   legend below the canvas, so to honour "top" we make the chart root a flex
   column and reorder the legend above the plot. ECharts plots position their
   own legend internally (see echartsOption), so these rules don't apply there. */
.plot-widget.legend-top .chart-area .uplot { display: flex; flex-direction: column; }
.plot-widget.legend-top .chart-area .u-legend { order: -1; }

/* ── Edit Mode layout ──────────────────────────────────────────────────── */

.edit-mode-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  background: #0f1117;
  outline: none;
}

.edit-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: #7c3aed;
  color: #e9d5ff;
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.iface-name-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid #3d4f6e;
  color: #e2e8f0;
  font-size: 0.9rem;
  padding: 0 4px;
  width: 200px;
  outline: none;
  font-family: system-ui, sans-serif;
}

.iface-name-input:focus {
  border-bottom-color: #60a5fa;
}

.dirty-dot {
  color: #f59e0b;
  font-size: 0.9rem;
  line-height: 1;
}

.toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #2d3748;
  border: none;
  color: #e2e8f0;
  font-size: 0.8rem;
  line-height: 1.2;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: system-ui, sans-serif;
  white-space: nowrap;
}

.toolbar-btn:hover { background: #374151; }

.toolbar-btn-primary {
  background: #2563eb;
  color: #fff;
}

.toolbar-btn-primary:hover:not(:disabled) { background: #1d4ed8; }
.toolbar-btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.toolbar-btn-active {
  background: #1e40af;
  color: #93c5fd;
  border: 1px solid #3b82f6;
}

/* time-nav styles are in the time-nav-bar section at the bottom of this file */

/* Overlay shown inside a plot widget while history is loading or unavailable */
.hist-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: #94a3b8;
  background: rgba(26, 31, 46, 0.75);
  pointer-events: none;
}
.hist-overlay-warn { color: #fbbf24; }

.edit-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* ── Center column tabs (Layout / Logic) ────────────────────────────────── */

.edit-center {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.center-tabs {
  display: flex;
  gap: 0;
  background: #0f1117;
  border-bottom: 1px solid #1e2433;
  flex: 0 0 auto;
}

.center-tab {
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  color: #94a3b8;
  background: transparent;
  border: none;
  border-right: 1px solid #1e2433;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}

.center-tab:hover { color: #e2e8f0; background: #161b27; }

.center-tab-active {
  color: #e2e8f0;
  border-bottom-color: #3b82f6;
  background: #161b27;
}

/* ── Logic flow editor (Node-RED style) ─────────────────────────────────── */

.flow-editor {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}

/* Palette of node types to add */
.flow-palette {
  width: 10rem;
  flex: 0 0 auto;
  border-right: 1px solid #1e2433;
  background: #0f1117;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-y: auto;
}

.flow-palette-toolbar {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.15rem;
}
.flow-palette-toolbar .toolbar-btn { flex: 1; }

.flow-palette-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #64748b;
}

.flow-palette-btn {
  text-align: left;
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  color: #e2e8f0;
  background: #161b27;
  border: 1px solid #1e2433;
  border-left-width: 3px;
  border-radius: 4px;
  cursor: pointer;
}

.flow-palette-btn:hover { background: #1c2230; }
.flow-palette-trigger { border-left-color: #f59e0b; }
.flow-palette-gate    { border-left-color: #a855f7; }
.flow-palette-flow    { border-left-color: #10b981; }
.flow-palette-action  { border-left-color: #3b82f6; }
.flow-palette-hint { margin-top: 0.5rem; font-size: 0.7rem; line-height: 1.4; }
.flow-palette-hint code { background: #1e2433; padding: 0 0.2em; border-radius: 3px; }

/* Scrollable node canvas */
.flow-canvas {
  flex: 1;
  min-width: 0;
  position: relative;
  overflow: auto;
  background:
    repeating-linear-gradient(0deg,  transparent 0 19px, #161b2733 19px 20px),
    repeating-linear-gradient(90deg, transparent 0 19px, #161b2733 19px 20px),
    #0b0e14;
}

.flow-canvas-inner {
  position: relative;
  width: 125rem;
  height: 87.5rem;
}

.flow-wires {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  overflow: visible;
}

.flow-wire {
  fill: none;
  stroke: #475569;
  stroke-width: 2;
  pointer-events: stroke;
  cursor: pointer;
}
.flow-wire:hover { stroke: #64748b; }
.flow-wire-selected { stroke: #ef4444; stroke-width: 2.5; }
.flow-wire-pending { stroke: #3b82f6; stroke-dasharray: 5 4; }

/* Synthetic-editor data-type wire colouring (scoped to .synth-graph so the
   Logic / ControlLogic editors that share .flow-wire are unaffected). Scalar
   keeps the default slate; array (waveform) signals are purple. */
.synth-graph .flow-wire.synth-wire-array { stroke: #a855f7; }
.synth-graph .flow-wire.synth-wire-array:hover { stroke: #c084fc; }

/* Node block */
.flow-node {
  position: absolute;
  background: #161b27;
  border: 1px solid #1e2433;
  border-radius: 6px;
  box-shadow: 0 2px 6px #0006;
  cursor: move;
  user-select: none;
}
.flow-node-trigger { border-top: 3px solid #f59e0b; }
.flow-node-gate    { border-top: 3px solid #a855f7; }
.flow-node-flow    { border-top: 3px solid #10b981; }
.flow-node-action  { border-top: 3px solid #3b82f6; }
.flow-node-selected { border-color: #3b82f6; box-shadow: 0 0 0 2px #3b82f680; }
.flow-node-error { border-color: #ef4444; box-shadow: 0 0 0 2px #ef444455; }
.flow-node-error.flow-node-selected { box-shadow: 0 0 0 2px #ef4444aa; }

.flow-node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.3rem 0.5rem;
}
.flow-node-title { font-size: 0.78rem; font-weight: 600; color: #e2e8f0; }
.flow-node-del {
  background: none; border: none; color: #64748b;
  cursor: pointer; font-size: 0.75rem; line-height: 1; padding: 0;
}
.flow-node-del:hover { color: #ef4444; }

.flow-node-body {
  padding: 0 0.5rem 0.4rem;
  font-size: 0.7rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Ports — input/output positions are set inline (in rem-scaled px) so they
   stay aligned with the node geometry on any root font size. */
.flow-port {
  position: absolute;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: #0b0e14;
  border: 2px solid #64748b;
  cursor: crosshair;
}
.flow-port:hover { border-color: #3b82f6; background: #3b82f6; }
.flow-port-then { border-color: #10b981; }
.flow-port-body { border-color: #10b981; }
.flow-port-else { border-color: #ef4444; }

/* Synthetic-editor port data-type colouring (scoped to .synth-graph so the
   Logic / ControlLogic editors that share .flow-port are unaffected). An 'any'
   port (accepts either type) keeps the default slate; scalar is blue, array
   purple — mirroring the wire palette so a port previews what it carries/accepts. */
.synth-graph .flow-port-type-scalar { border-color: #3b82f6; }
.synth-graph .flow-port-type-array  { border-color: #a855f7; }
.synth-graph .flow-port-type-any    { border-color: #64748b; }

.flow-port-label {
  position: absolute;
  right: 10px;
  font-size: 0.6rem;
  color: #64748b;
  pointer-events: none;
}

/* Named input ports (Formula/Lua) show their variable name beside the port. */
.flow-port-label-in {
  position: absolute;
  left: 0.55rem;
  font-size: 0.6rem;
  color: #94a3b8;
  pointer-events: none;
}

/* Named-input editor row in the inspector */
.synth-var-row {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  margin-bottom: 0.3rem;
}
.synth-var-row > input { flex: 1; min-width: 0; }

/* Expression field: signal-insert helper row */
.flow-expr-insert {
  display: flex;
  gap: 0.35rem;
  margin-top: 0.35rem;
}
.flow-expr-insert > * { flex: 1; min-width: 0; }
.prop-input-error { border-color: #ef4444; }

/* Inspector */
.flow-inspector {
  width: 15rem;
  flex: 0 0 auto;
  border-left: 1px solid #1e2433;
  background: #0f1117;
  padding: 0.75rem;
  overflow-y: auto;
}

/* Local-variable editor in the palette */
.flow-localvars {
  margin-top: 0.5rem;
  border-top: 1px solid #1e2433;
  padding-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.flow-localvars-empty { padding: 0; }
.flow-localvar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  padding: 0.2rem 0.4rem;
  background: #161b27;
  border: 1px solid #1e2433;
  border-left: 3px solid #14b8a6;
  border-radius: 4px;
}
.flow-localvar-name {
  font-size: 0.78rem;
  color: #e2e8f0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.flow-localvar-add { text-align: center; border-left-color: #14b8a6; }
.flow-localvar-form {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.flow-localvar-actions {
  display: flex;
  gap: 0.35rem;
}
.flow-localvar-actions .panel-btn { flex: 1; }

/* Repeated rows in inspector editors (export columns, dialog fields). */
.flow-row-edit {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
}
.flow-row-edit .prop-input { flex: 1; min-width: 0; }
.flow-row-add {
  width: 100%;
  margin-top: 0.15rem;
}

.flow-field-edit {
  border: 1px solid #2a3548;
  border-radius: 4px;
  padding: 0.4rem;
  margin-bottom: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.flow-field-head {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.flow-field-head .prop-input { flex: 1; min-width: 0; }
.flow-field-kind {
  font-size: 0.75rem;
  color: #94a3b8;
  flex: 0 0 auto;
}
.flow-field-add {
  display: flex;
  gap: 0.35rem;
}

/* ── History pane ───────────────────────────────────────────────────────── */

.history-pane {
  width: 280px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: #11151f;
  border-left: 1px solid #1f2733;
  overflow: hidden;
}

.history-pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 13px;
  border-bottom: 1px solid #1f2733;
  color: #cbd5e1;
}

.history-save-row {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid #1f2733;
}

.history-tag-input {
  flex: 1;
  min-width: 0;
  background: #0a0d14;
  border: 1px solid #2a3543;
  border-radius: 4px;
  color: #e2e8f0;
  padding: 4px 8px;
  font-size: 12px;
}

.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
}

.history-empty {
  padding: 16px 12px;
  color: #64748b;
  font-size: 12px;
  text-align: center;
}

.history-item {
  padding: 8px 10px;
  border: 1px solid #1f2733;
  border-radius: 6px;
  margin-bottom: 6px;
  background: #0e1219;
}

.history-item-current {
  border-color: #2563eb;
  background: #0f1830;
}

.history-item-main {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.history-version {
  font-weight: 600;
  font-size: 12px;
  color: #93c5fd;
}

.history-tag {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 10px;
  background: #1e293b;
  color: #cbd5e1;
}

.history-current-badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 1px 6px;
  border-radius: 10px;
  background: #2563eb;
  color: #fff;
}

.history-item-meta {
  font-size: 11px;
  color: #64748b;
  margin-top: 3px;
}

.history-item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.history-action-btn {
  flex: 1 1 auto;
  font-size: 11px;
  padding: 3px 6px;
  background: #1e293b;
  border: 1px solid #2a3543;
  border-radius: 4px;
  color: #cbd5e1;
  cursor: pointer;
  white-space: nowrap;
}

.history-action-btn:hover {
  background: #2a3543;
}

/* ── Edit Canvas ────────────────────────────────────────────────────────── */

.edit-canvas-container {
  flex: 1;
  position: relative;
  overflow: auto;
  background: #0a0d14;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 20px 20px;
  min-width: 0;
}

/* Widget overlays */
.widget-overlay {
  position: absolute;
  box-sizing: border-box;
  cursor: move;
  border: 1px solid transparent;
  transition: border-color 0.1s;
  z-index: 10;
}

.widget-overlay:hover {
  border-color: rgba(96, 165, 250, 0.4);
}

.widget-overlay.selected {
  border: 2px solid #60a5fa;
  border-radius: 2px;
}

.overlay-delete {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ef4444;
  color: #fff;
  border: none;
  font-size: 0.65rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 30;
  padding: 0;
}

.overlay-delete:hover { background: #dc2626; }

/* Resize handles */
.resize-handle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: #60a5fa;
  border: 1px solid #1e40af;
  border-radius: 1px;
  z-index: 20;
}

.resize-n  { top: -4px; left: 50%; transform: translateX(-50%); cursor: n-resize; }
.resize-s  { bottom: -4px; left: 50%; transform: translateX(-50%); cursor: s-resize; }
.resize-e  { right: -4px; top: 50%; transform: translateY(-50%); cursor: e-resize; }
.resize-w  { left: -4px; top: 50%; transform: translateY(-50%); cursor: w-resize; }
.resize-ne { top: -4px; right: -4px; cursor: ne-resize; }
.resize-nw { top: -4px; left: -4px; cursor: nw-resize; }
.resize-se { bottom: -4px; right: -4px; cursor: se-resize; }
.resize-sw { bottom: -4px; left: -4px; cursor: sw-resize; }

/* ── Widget Type Picker ──────────────────────────────────────────────────── */

.widget-picker-backdrop {
  position: fixed;
  inset: 0;
  z-index: 8000;
}

.widget-picker {
  position: fixed;
  background: #1a1f2e;
  border: 1px solid #3d4f6e;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  min-width: 220px;
  max-height: 420px;
  overflow-y: auto;
  z-index: 8001;
}

.widget-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
  border-bottom: 1px solid #2d3748;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.widget-picker-list { padding: 4px 0; }

.widget-picker-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  width: 100%;
  background: none;
  border: none;
  color: #e2e8f0;
  padding: 0.4rem 0.75rem;
  text-align: left;
  cursor: pointer;
  font-family: system-ui, sans-serif;
}

.widget-picker-item:hover { background: #2d3748; }

.wpt-label { font-size: 0.85rem; font-weight: 500; }
.wpt-desc  { font-size: 0.75rem; color: #64748b; }

/* ── Signal Tree ─────────────────────────────────────────────────────────── */

.signal-tree-panel {
  border-right: 1px solid #2d3748;
}

.signal-tree-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* ── Signal tree tab bar ──────────────────────────────────────────────────── */

.signal-tree-tabs {
  display: flex;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.stab {
  flex: 1;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: #64748b;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.15s, border-color 0.15s;
}
.stab:hover { color: #94a3b8; }
.stab-active { color: #e2e8f0; border-bottom-color: #4a9eff; }

/* ── Groups tree ──────────────────────────────────────────────────────────── */

.groups-tree {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.groups-toolbar {
  display: flex;
  gap: 0.25rem;
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.group-list { overflow-y: auto; flex: 1; padding: 0.25rem 0; }

.group-add-row {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
}
.group-add-root { padding: 0.25rem 0.5rem; }
.group-add-input {
  flex: 1;
  background: #0f1117;
  border: 1px solid #4a9eff;
  border-radius: 3px;
  color: #e2e8f0;
  font-size: 0.78rem;
  padding: 2px 6px;
  min-width: 0;
}

.group-folder { margin-bottom: 1px; }

.group-folder-header {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.15rem 0.4rem;
  cursor: default;
  border-radius: 3px;
  font-size: 0.8rem;
  color: #94a3b8;
  min-height: 1.7rem;
}
.group-folder-header:hover { background: #1e293b; color: #cbd5e1; }
.group-folder-header:hover .group-folder-actions { opacity: 1; }

.group-folder-arrow { font-size: 0.65rem; flex-shrink: 0; width: 0.9rem; text-align: center; cursor: pointer; }
.group-folder-name  { flex: 1; font-weight: 600; cursor: pointer; user-select: none; }
.group-folder-count {
  font-size: 0.65rem;
  color: #475569;
  background: #1e293b;
  border-radius: 8px;
  padding: 0 5px;
  min-width: 1.1rem;
  text-align: center;
}
.group-folder-actions {
  display: flex;
  gap: 1px;
  opacity: 0;
  transition: opacity 0.15s;
}
.group-folder-actions .icon-btn { font-size: 0.65rem; padding: 1px 3px; }

.group-rename-input {
  flex: 1;
  background: #0f1117;
  border: 1px solid #4a9eff;
  border-radius: 3px;
  color: #e2e8f0;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 1px 4px;
  min-width: 0;
}

.group-folder-children {
  padding-left: 1rem;
  border-left: 1px solid #1e293b;
  margin-left: 0.7rem;
}

.group-signal-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.4rem;
  font-size: 0.78rem;
  color: #94a3b8;
  border-radius: 3px;
  cursor: grab;
  min-height: 1.5rem;
}
.group-signal-item:hover { background: #1e293b; color: #cbd5e1; }
.group-signal-item:hover .group-node-remove { opacity: 1; }

.group-signal-ds {
  color: #475569;
  font-size: 0.7rem;
  flex-shrink: 0;
}
.group-signal-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.group-node-remove { opacity: 0; transition: opacity 0.15s; margin-left: auto; flex-shrink: 0; }

.signal-tree-search {
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.signal-filter {
  width: 100%;
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 4px;
  color: #e2e8f0;
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  outline: none;
  font-family: system-ui, sans-serif;
}

.signal-filter:focus { border-color: #4a9eff; }

.signal-list { overflow-y: auto; flex: 1; }

.signal-group { margin-bottom: 2px; }

.signal-group-header {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
  color: #94a3b8;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  user-select: none;
}

.signal-group-header:hover { color: #cbd5e1; }

.signal-group-arrow { font-size: 0.7rem; flex-shrink: 0; }
.signal-group-name  { flex: 1; }
.signal-group-count {
  font-size: 0.7rem;
  background: #2d3748;
  border-radius: 10px;
  padding: 0 5px;
  color: #64748b;
}

.signal-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.5rem 0.25rem 1.25rem;
  cursor: grab;
  border-radius: 3px;
  margin: 1px 4px;
  user-select: none;
}

.signal-item:hover { background: #1e2535; }
.signal-item:active { cursor: grabbing; }

.signal-name { font-size: 0.8rem; color: #cbd5e1; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.signal-unit { font-size: 0.7rem; color: #64748b; flex-shrink: 0; }

/* Signal tree toolbar (+ Synthetic, CSV, Refresh) */
.signal-tree-toolbar {
  display: flex;
  gap: 0.25rem;
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid #2d3748;
  flex-wrap: wrap;
}

/* Row containing filter input + CF search button */
.signal-search-row {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

/* "+" button inside group header */
.signal-add-btn {
  margin-left: auto;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.15s;
}
.signal-group-header:hover .signal-add-btn { opacity: 1; }

/* Inline add-signal row */
.signal-add-row {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem 0.2rem 1.5rem;
}
.signal-add-input {
  flex: 1;
  font-size: 0.8rem;
  background: #1a2236;
  border: 1px solid #4a5568;
  border-radius: 4px;
  color: #e2e8f0;
  padding: 0.15rem 0.4rem;
  outline: none;
}
.signal-add-input:focus { border-color: #63b3ed; }

/* Custom (manually added) signal items */
.signal-custom { opacity: 0.85; }
.signal-custom .signal-name { font-style: italic; }

/* Remove button on custom items */
.signal-remove-btn {
  margin-left: auto;
  font-size: 0.7rem;
  opacity: 0;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.signal-item:hover .signal-remove-btn { opacity: 1; }

/* ── Synthetic Wizard ─────────────────────────────────────────────────────── */

.wizard-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.wizard {
  background: #1e2535;
  border: 1px solid #2d3748;
  border-radius: 8px;
  width: min(600px, 92vw);
  min-width: 380px;
  min-height: 440px;
  max-width: 95vw;
  max-height: 92vh;
  resize: both;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

/* Synthetic-signal node editor: a large modal hosting the shared .flow-editor
   layout (palette | canvas | inspector). */
.synth-graph {
  background: #1e2535;
  border: 1px solid #2d3748;
  border-radius: 8px;
  width: 92vw;
  height: 88vh;
  max-width: 95vw;
  max-height: 92vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  position: relative;
}

/* Quick-add HUD (S = signal, N = node) */
.synth-hud-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 22, 0.45);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  z-index: 20;
}
.synth-hud {
  width: 26rem;
  max-width: 80%;
  background: #1a1f2e;
  border: 1px solid #3a4660;
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.55);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.synth-hud-input {
  border: none;
  border-bottom: 1px solid #2d3748;
  background: #0f1117;
  color: #e2e8f0;
  font-size: 0.9rem;
  padding: 0.6rem 0.75rem;
  outline: none;
}
.synth-hud-list {
  max-height: 18rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.synth-hud-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  background: none;
  border: none;
  color: #e2e8f0;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
}
.synth-hud-item:hover { background: #243049; }
.synth-hud-item-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.synth-hud-item-meta { color: #64748b; font-size: 0.72rem; flex-shrink: 0; }
.synth-hud-empty { padding: 0.6rem 0.75rem; }

.wizard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #2d3748;
  font-weight: 600;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.wizard-body {
  padding: 1rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.wizard-footer {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  padding: 0.75rem 1rem;
  border-top: 1px solid #2d3748;
}

.wizard-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: #64748b;
  letter-spacing: 0.06em;
  margin-top: 0.5rem;
}

.wizard-field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.wizard-field label {
  font-size: 0.75rem;
  color: #94a3b8;
}

/* Side-by-side fields */
.wizard-field-row {
  flex-direction: row;
  gap: 0.5rem;
}
.wizard-field-row > .wizard-field { flex: 1; }

.wizard-error {
  color: #fc8181;
  font-size: 0.8rem;
  background: rgba(252,129,129,0.1);
  border: 1px solid #fc8181;
  border-radius: 4px;
  padding: 0.4rem 0.6rem;
}

/* ── Synthetic Editor ────────────────────────────────────────────────────── */

/* ── Lua editor ────────────────────────────────────────────────────────────── */

.lua-editor {
  position: relative;
  border: 1px solid #3d4f6e;
  border-radius: 4px;
  overflow: hidden;
  background: #0a0d14;
  font-family: ui-monospace, 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.5;
  min-height: 6em;
}

.lua-pre,
.lua-textarea {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 6px 8px;
  border: none;
  outline: none;
  overflow: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  tab-size: 2;
  font: inherit;
  box-sizing: border-box;
}

.lua-pre {
  color: #e2e8f0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.lua-textarea {
  color: transparent;
  caret-color: #e2e8f0;
  background: transparent;
  resize: none;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.lua-textarea:focus {
  outline: none;
  box-shadow: inset 0 0 0 1px #4a9eff;
}

/* Syntax token colours */
.lua-kw  { color: #c792ea; font-weight: 600; }
.lua-str { color: #c3e88d; }
.lua-cmt { color: #546e7a; font-style: italic; }
.lua-num { color: #f78c6c; }

/* ── CUE editor (config rules) ───────────────────────────────────────────────── */
.cue-editor {
  position: relative;
  border: 1px solid #3d4f6e;
  border-radius: 4px;
  overflow: hidden;
  background: #0a0d14;
  font-family: ui-monospace, 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.5;
  min-height: 6em;
}

.cue-pre,
.cue-textarea {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 6px 8px;
  border: none;
  outline: none;
  overflow: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  tab-size: 2;
  font: inherit;
  box-sizing: border-box;
}

.cue-pre {
  color: #e2e8f0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.cue-textarea {
  color: transparent;
  caret-color: #e2e8f0;
  background: transparent;
  resize: none;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.cue-textarea:focus {
  outline: none;
  box-shadow: inset 0 0 0 1px #4a9eff;
}

.cue-kw   { color: #c792ea; font-weight: 600; }
.cue-type { color: #82aaff; }
.cue-attr { color: #ffcb6b; }
.cue-str  { color: #c3e88d; }
.cue-cmt  { color: #546e7a; font-style: italic; }
.cue-num  { color: #f78c6c; }

.cue-ac {
  position: fixed;
  z-index: 2000;
  margin: 0;
  padding: 2px;
  list-style: none;
  background: #131826;
  border: 1px solid #3d4f6e;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  max-height: 14em;
  overflow: auto;
  font-family: ui-monospace, 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px;
  min-width: 8em;
}

.cue-ac-item {
  padding: 2px 8px;
  border-radius: 3px;
  color: #cdd6e4;
  cursor: pointer;
  white-space: nowrap;
}

.cue-ac-item.active,
.cue-ac-item:hover {
  background: #2a4d7a;
  color: #fff;
}

/* ── Config rules ────────────────────────────────────────────────────────────── */
.cfg-rule-set {
  font-size: 11px;
  opacity: 0.75;
  margin-left: auto;
  margin-right: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 9em;
}

.cfg-rule-help {
  margin: 4px 0 6px;
  line-height: 1.5;
}
.cfg-rule-help code {
  background: #111726;
  border: 1px solid #2a3550;
  border-radius: 3px;
  padding: 0 3px;
  font-family: ui-monospace, monospace;
  font-size: 11px;
}

.cfg-rule-check {
  margin-top: 8px;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.5;
}
.cfg-rule-check-ok {
  background: #11271a;
  border: 1px solid #2e6b46;
  color: #b6f0c8;
}
.cfg-rule-check-err {
  background: #2a1416;
  border: 1px solid #7a3038;
  color: #ffc7cd;
}
.cfg-rule-violations {
  margin: 4px 0 0;
  padding-left: 18px;
}
.cfg-rule-violations code,
.cfg-rule-derived code {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
  padding: 0 3px;
  font-family: ui-monospace, monospace;
}
.cfg-rule-derived {
  display: inline-block;
  margin: 0 4px;
}

/* wizard is already wide enough and resizable — no extra :has() rule needed */

/* ── Synthetic pipeline ─────────────────────────────────────────────────────── */

.synth-pipeline-node {
  background: #1a2234;
  border: 1px solid #2d3748;
  border-radius: 6px;
  padding: 0.5rem 0.6rem;
  margin-bottom: 0.4rem;
}

.synth-node-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.synth-node-index {
  font-size: 0.7rem;
  color: #64748b;
  background: #2d3748;
  border-radius: 3px;
  padding: 0.1rem 0.35rem;
  min-width: 1.2rem;
  text-align: center;
}

.synth-node-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
  flex: 1;
}

.synth-node-actions {
  display: flex;
  gap: 0.2rem;
}

.synth-add-node-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px solid #2d3748;
}
.synth-add-node-row .prop-select { flex: 1; }

.wizard-field-inline {
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem !important;
}
.wizard-field-inline label {
  min-width: 7rem;
  flex-shrink: 0;
}
.wizard-field-inline .prop-input { flex: 1; }

/* Edit button on synthetic signal items */
.signal-edit-btn {
  margin-left: auto;
  font-size: 0.75rem;
  opacity: 0;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.signal-item:hover .signal-edit-btn { opacity: 1; }
/* When edit button is present, remove-btn should not auto-margin */
.signal-edit-btn + .signal-remove-btn { margin-left: 0; }

/* ── Properties Pane ─────────────────────────────────────────────────────── */

.props-panel {
  width: 240px;
  min-width: 240px;
}

.props-body {
  overflow-y: auto;
  flex: 1;
  padding: 0.5rem 0;
}

.props-section {
  padding: 0 0 0.75rem;
  border-bottom: 1px solid #2d3748;
  margin-bottom: 0.5rem;
}

.props-section:last-child { border-bottom: none; }

.props-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.4rem 0.6rem 0.3rem;
}

.prop-field {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.6rem;
}

.prop-label {
  font-size: 0.75rem;
  color: #64748b;
  width: 60px;
  flex-shrink: 0;
}

.prop-input {
  flex: 1;
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 3px;
  color: #e2e8f0;
  font-size: 0.8rem;
  padding: 0.15rem 0.35rem;
  outline: none;
  font-family: system-ui, sans-serif;
  min-width: 0;
}

.prop-input:focus { border-color: #4a9eff; }

.prop-input-num { width: 70px; flex: none; }

/* Column wrapper: input on top, hint below — avoids squeezing input */
.prop-field-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.prop-select {
  flex: 1;
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 3px;
  color: #e2e8f0;
  font-size: 0.8rem;
  padding: 0.15rem 0.35rem;
  outline: none;
  font-family: system-ui, sans-serif;
}

.prop-sig {
  font-size: 0.75rem;
  color: #94a3b8;
  font-family: ui-monospace, monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── InterfaceList item actions ─────────────────────────────────────────── */

.iface-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.iface-item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.iface-item-actions {
  display: none;
  gap: 2px;
  flex-shrink: 0;
}

.iface-item:hover .iface-item-actions { display: flex; }

.iface-item[draggable="true"] .iface-item-name { cursor: grab; }

/* Drag-and-drop reorder / move-to-folder affordances */
.iface-item.drop-target {
  box-shadow: inset 0 2px 0 0 #3b82f6;
}
.iface-folder-header.drop-target,
.iface-list.drop-target {
  background: rgba(59, 130, 246, 0.15);
  outline: 1px dashed #3b82f6;
}

.iface-delete { color: #ef4444 !important; }
.iface-delete:hover { background: rgba(239, 68, 68, 0.15) !important; }

/* ── Panel sharing / folders (access control) ───────────────────────────── */

.iface-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 0 4px;
  font-size: 0.6rem;
  line-height: 1.3;
  color: #94a3b8;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 3px;
  vertical-align: middle;
}

.iface-folder { list-style: none; }

.iface-folder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.iface-folder-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  color: #cbd5e1;
  font-weight: 600;
}

.iface-folder:hover .iface-item-actions { display: flex; }

.iface-sublist {
  margin-left: 0.75rem;
  border-left: 1px solid #2d3748;
  padding-left: 0.4rem;
}

/* ── Phase 7 additions ───────────────────────────────────────────────────── */

/* Rubber-band selection rectangle */
.rubber-band {
  position: absolute;
  pointer-events: none;
  border: 1px solid #60a5fa;
  background: rgba(96, 165, 250, 0.08);
  z-index: 50;
  box-sizing: border-box;
}

/* Edit toolbar tools (center section) */
.edit-toolbar-tools {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-wrap: wrap;
  justify-content: center;
}

.toolbar-sep {
  width: 1px;
  height: 18px;
  background: #2d3748;
  margin: 0 0.1rem;
  flex-shrink: 0;
}

.toolbar-btn.icon-only {
  padding: 0.25rem 0.45rem;
  font-size: 0.75rem;
}

.toolbar-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* Snap-to-grid toggle */
.snap-toggle {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  color: #94a3b8;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.snap-toggle input { cursor: pointer; accent-color: #4a9eff; }

/* Insert dropdown */
.toolbar-dropdown {
  position: relative;
}

.toolbar-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 9000;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  min-width: 140px;
  padding: 4px 0;
}

/* Right-aligned variant (toolbar-right dropdowns expand leftward to stay
   on-screen instead of overflowing the viewport edge). */
.toolbar-dropdown-menu-right { left: auto; right: 0; }

/* Align toolbar */
.align-toolbar {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

/* ── Help Manual button (📖) in toolbar ─────────────────────────────────── */

.help-manual-btn {
  font-size: 1rem;
  line-height: 1;
  padding: 0.15rem 0.35rem;
  opacity: 0.8;
  transition: opacity 0.15s;
}
.help-manual-btn:hover { opacity: 1; }

/* ── Help Modal ──────────────────────────────────────────────────────────── */

.help-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
}

.help-modal {
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 10px;
  width: min(960px, 96vw);
  height: min(720px, 94vh);
  display: flex;
  flex-direction: column;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.help-title {
  font-size: 1rem;
  font-weight: 700;
  color: #e2e8f0;
}

.help-close {
  font-size: 1rem;
  color: #64748b;
}
.help-close:hover { color: #e2e8f0; }

.help-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar navigation */
.help-sidebar {
  width: 188px;
  min-width: 188px;
  border-right: 1px solid #2d3748;
  display: flex;
  flex-direction: column;
  padding: 0.5rem 0;
  overflow-y: auto;
  flex-shrink: 0;
}

.help-nav-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.55rem 1.1rem;
  font-size: 0.85rem;
  color: #94a3b8;
  background: none;
  border: none;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  border-left: 3px solid transparent;
}
.help-nav-item:hover { background: #0f1117; color: #cbd5e1; }
.help-nav-item.active {
  color: #4a9eff;
  background: rgba(74, 158, 255, 0.08);
  border-left-color: #4a9eff;
  font-weight: 600;
}

/* Content area */
.help-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem 2rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: #cbd5e1;
}

.help-h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #e2e8f0;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #2d3748;
}

.help-h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 1.2rem 0 0.4rem;
}

.help-lead {
  color: #94a3b8;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.help-list {
  padding-left: 1.2rem;
  margin: 0.4rem 0 0.8rem;
}
.help-list li { margin-bottom: 0.3rem; }

/* SVG diagrams */
.help-diagram {
  display: block;
  width: 100%;
  max-width: 580px;
  height: auto;
  border-radius: 8px;
  margin: 1rem 0 0.25rem;
  border: 1px solid #2d3748;
}
.help-diagram-narrow {
  max-width: 280px;
}

.help-caption {
  font-size: 0.75rem;
  color: #64748b;
  margin-bottom: 1rem;
  font-style: italic;
}

.help-callout {
  border-left: 3px solid #2563eb;
  background: #1a2236;
  padding: 0.6rem 0.85rem;
  margin: 0.85rem 0;
  border-radius: 4px;
  font-size: 0.85rem;
  color: #cbd5e1;
}

/* Getting started cards */
.help-cards {
  display: flex;
  gap: 0.75rem;
  margin: 0.75rem 0 1rem;
  flex-wrap: wrap;
}

.help-card {
  flex: 1;
  min-width: 180px;
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 6px;
  padding: 0.75rem 1rem;
}

.help-card-title {
  font-weight: 600;
  color: #e2e8f0;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

/* Widget reference table */
.help-widget-table {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0.75rem 0;
  border: 1px solid #2d3748;
  border-radius: 6px;
  overflow: hidden;
}

.help-widget-row {
  display: flex;
  gap: 1rem;
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid #1e2535;
}
.help-widget-row:last-child { border-bottom: none; }
.help-widget-row:nth-child(odd) { background: #0f1117; }

.help-widget-name {
  font-weight: 600;
  color: #4a9eff;
  min-width: 120px;
  font-size: 0.82rem;
}

.help-widget-desc {
  color: #94a3b8;
  font-size: 0.82rem;
}

/* Two-column layout for signals section */
.help-two-col {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}
.help-two-col > div:first-child { flex: 1; }

/* Shortcut table */
.help-shortcut-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  font-size: 0.83rem;
}

.help-shortcut-table th {
  text-align: left;
  padding: 0.4rem 0.75rem;
  background: #0f1117;
  color: #64748b;
  font-weight: 600;
  border-bottom: 1px solid #2d3748;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.help-shortcut-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid #1e2535;
  color: #cbd5e1;
}

.help-shortcut-table tr:last-child td { border-bottom: none; }
.help-shortcut-table tr:nth-child(odd) td { background: rgba(15, 17, 23, 0.5); }

.help-kbd {
  display: inline-block;
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-family: monospace;
  font-size: 0.8rem;
  color: #e2e8f0;
  white-space: nowrap;
}

/* Inline code */
.help-content code {
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 3px;
  padding: 0.1rem 0.35rem;
  font-size: 0.82rem;
  font-family: monospace;
  color: #4a9eff;
}

/* Config block */
.help-pre {
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-family: monospace;
  font-size: 0.8rem;
  color: #94a3b8;
  white-space: pre-wrap;
  margin: 0.75rem 0;
  line-height: 1.6;
}

/* kbd element in content */
kbd {
  display: inline-block;
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 3px;
  padding: 0 0.35rem;
  font-size: 0.8rem;
  font-family: monospace;
  color: #e2e8f0;
}

/* ── Manual: Quick Tips list ─────────────────────────────────────────────── */

.help-tips-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.help-tip-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  text-align: left;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  padding: 0.55rem 0.7rem;
  color: #cbd5e1;
  font-size: 0.85rem;
  line-height: 1.45;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.help-tip-item:hover {
  border-color: #4a9eff;
  background: #1e2540;
}

.help-tip-icon {
  flex-shrink: 0;
  font-size: 1rem;
}

.help-tip-text { flex: 1; }

.help-tip-go {
  flex-shrink: 0;
  color: #4a9eff;
  font-weight: 700;
}


/* ── Historical time-nav bar (below main toolbar, hidden by default) ──────── */

.time-nav-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: #161b27;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.time-input {
  font-size: 0.75rem;
  background: #1a2236;
  border: 1px solid #2d3748;
  color: #e2e8f0;
  border-radius: 4px;
  padding: 0.25rem 0.4rem;
  cursor: pointer;
  height: 28px;
  box-sizing: border-box;
}
.time-input:focus { outline: none; border-color: #63b3ed; }
.time-input::-webkit-calendar-picker-indicator { filter: invert(0.8); }

.time-sep {
  color: #475569;
  font-size: 0.8rem;
}

/* ── Fullscreen mode ──────────────────────────────────────────────────────── */

.fs-view {
  width: 100vw;
  height: 100vh;
  overflow: auto;
  background: #0f1117;
  display: flex;
}

.fs-error {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f87171;
  font-size: 1rem;
}

/* ── Signal drop menu (drop onto existing widget) ─────────────────────────── */

.signal-drop-backdrop {
  position: absolute;
  inset: 0;
  z-index: 9500;
}

.signal-drop-menu {
  position: fixed;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 6px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.6);
  min-width: 220px;
  z-index: 9600;
  overflow: hidden;
  transform: translateY(4px);
}

.signal-drop-header {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  color: #64748b;
  border-bottom: 1px solid #2d3748;
}

.signal-drop-header strong {
  color: #94a3b8;
}

.ctx-cancel {
  color: #6b7280;
  border-top: 1px solid #2d3748;
}

/* ── Button widget: pressed / mode hint ──────────────────────────────────── */

.btn-pressed {
  background: #1e40af !important;
  border-color: #3b82f6 !important;
  color: #93c5fd !important;
}

.btn-mode-hint {
  font-size: 0.65rem;
  opacity: 0.7;
  margin-left: 0.35rem;
}

/* ── PropertiesPane: signals list + hint text ─────────────────────────────── */

.prop-signals-list {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  width: 100%;
}

.prop-signal-row {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  justify-content: space-between;
}

.prop-sig-remove {
  font-size: 0.65rem;
  opacity: 0.6;
  flex-shrink: 0;
}
.prop-sig-remove:hover { opacity: 1; color: #f87171; }

.prop-hint {
  display: block;
  font-size: 0.65rem;
  color: #475569;
  margin-top: 0.15rem;
  line-height: 1.2;
}

/* ── View tabs ─────────────────────────────────────────────────────────── */

.view-content-area {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

/* ── InfoPanel ─────────────────────────────────────────────────────────── */

.info-panel {
  position: fixed;
  top: 60px;
  right: 16px;
  z-index: 8000;
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  min-width: 260px;
  max-width: 340px;
  max-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  font-family: system-ui, sans-serif;
  font-size: 0.82rem;
}

.info-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.info-panel-title {
  font-weight: 600;
  color: #e2e8f0;
  font-size: 0.85rem;
}

.info-panel-close {
  background: none;
  border: none;
  color: #64748b;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}
.info-panel-close:hover { background: #2d3748; color: #e2e8f0; }

.info-panel-body {
  overflow-y: auto;
  padding: 0.5rem 0;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-key {
  padding: 0.2rem 0.75rem;
  color: #64748b;
  font-size: 0.75rem;
  white-space: nowrap;
  vertical-align: top;
  width: 36%;
}

.info-val {
  padding: 0.2rem 0.75rem 0.2rem 0;
  color: #cbd5e1;
  font-size: 0.8rem;
  word-break: break-all;
}

.info-mono {
  font-family: ui-monospace, monospace;
  font-size: 0.75rem;
}

.info-sep {
  height: 1px;
  background: #1e293b;
  margin: 0.4rem 0;
}

.info-section-hdr {
  padding: 0.2rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  color: #475569;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-desc {
  padding: 0.25rem 0.75rem;
  color: #94a3b8;
  font-size: 0.78rem;
  line-height: 1.4;
}

/* ── Zoom control ─────────────────────────────────────────────────────────── */

.zoom-control {
  display: flex;
  align-items: center;
  gap: 2px;
}

.zoom-btn {
  background: #1e293b;
  border: 1px solid #2d3748;
  color: #94a3b8;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
  line-height: 1.4;
}
.zoom-btn:hover { color: #e2e8f0; border-color: #475569; background: #273244; }

.zoom-pct {
  font-size: 0.72rem;
  color: #64748b;
  width: 2.8rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ── Searchable Select ────────────────────────────────────────────────────── */

.search-select {
  position: relative;
  width: 100%;
}

.search-select-trigger {
  background: #0f1117;
  border: 1px solid #2d3748;
  border-radius: 3px;
  padding: 0.15rem 0.35rem;
  font-size: 0.8rem;
  color: #e2e8f0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 1.5rem;
}

.search-select-trigger:hover {
  border-color: #4a5568;
}

.search-select-arrow {
  font-size: 0.6rem;
  color: #64748b;
  margin-left: 0.25rem;
}

/* Muted placeholder text inside the trigger. Unlike .hint it adds no padding,
   so an empty select is exactly as tall as one showing a selected value. */
.search-select-placeholder {
  color: #475569;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-select-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #1a1f2e;
  border: 1px solid #4a9eff;
  border-radius: 4px;
  margin-top: 2px;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  padding: 0.25rem;
  gap: 0.25rem;
}

.search-select-list {
  max-height: 180px;
  overflow-y: auto;
}

.search-select-item {
  padding: 0.2rem 0.4rem;
  font-size: 0.75rem;
  color: #cbd5e1;
  cursor: pointer;
  border-radius: 2px;
}

.search-select-item:hover {
  background: #2d3748;
  color: #e2e8f0;
}

.search-select-item-selected {
  background: rgba(74, 158, 255, 0.15);
  color: #4a9eff;
  font-weight: 600;
}

.search-select-backdrop {
  position: fixed;
  inset: 0;
  z-index: 999;
}

/* ── Signal Tree Refinements ────────────────────────────────────────────── */

.signal-tree-toolbar select.prop-select {
  border-color: #2d3748;
  background-color: #0f1117;
  color: #94a3b8;
  transition: all 0.2s;
}

.signal-tree-toolbar select.prop-select:hover {
  border-color: #4a5568;
  color: #e2e8f0;
}

.signal-item {
  display: flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  font-size: 0.8rem;
  color: #cbd5e1;
  border-radius: 4px;
  cursor: grab;
  gap: 0.4rem;
}

.signal-item:hover {
  background: #2d3748;
}

.signal-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.signal-unit {
  font-size: 0.7rem;
  color: #64748b;
  background: #1a1f2e;
  padding: 0 4px;
  border-radius: 3px;
  border: 1px solid #2d3748;
}

.panel-btn.icon-only {
  padding: 0 0.35rem;
  min-width: 1.6rem;
  width: auto;
  height: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.app-root {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  overflow: hidden;
}

.view-panel-container {
  display: none;
  flex: 1;
  min-height: 0;
  position: relative;
}

.view-panel-container.active {
  display: flex;
  flex-direction: column;
}

/* ── Plot panels (split layout) ─────────────────────────────────────────── */

/* Edit surface: fills the editor body flex slot. */
.plot-panel-edit {
  flex: 1;
  min-width: 0;
  min-height: 0;
  position: relative;
  overflow: hidden;
  display: flex;
  background: #0a0d14;
}

/* View/fullscreen surface: fills the (relative) canvas container. */
.plot-panel-view {
  position: absolute;
  inset: 0;
  display: flex;
}

.split-root {
  flex: 1;
  display: flex;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
}

.split-row { display: flex; flex-direction: row;    flex: 1; min-width: 0; min-height: 0; }
.split-col { display: flex; flex-direction: column; flex: 1; min-width: 0; min-height: 0; }

.split-child {
  display: flex;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.split-leaf {
  flex: 1;
  display: flex;
  position: relative;
  min-width: 0;
  min-height: 0;
}

.split-divider {
  flex: 0 0 auto;
  background: #1e293b;
  transition: background 0.12s;
}
.split-divider-h { width: 6px;  cursor: col-resize; }
.split-divider-v { height: 6px; cursor: row-resize; }
.split-divider:hover { background: #4a9eff; }
.split-divider-static { pointer-events: none; }

/* Neutralize the free-form absolute positioning of plot widgets so they fill
   their split pane responsively (the chart uses a ResizeObserver). */
.split-leaf .plot-widget {
  position: relative !important;
  left: auto !important;
  top: auto !important;
  width: 100% !important;
  height: 100% !important;
  border-radius: 0;
}
.split-leaf .chart-area {
  width: 100% !important;
  height: 100% !important;
}

/* Editable pane chrome. */
.plot-pane {
  position: relative;
  flex: 1;
  display: flex;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: #0f1117;
  outline: 1px solid transparent;
}
/* Dim panes that are not the one currently being edited. */
.plot-panel-edit .plot-pane:not(.plot-pane-selected)::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 22, 0.45);
  z-index: 4;
  pointer-events: none;
}

.plot-pane-selected {
  outline: 3px solid #4a9eff;
  outline-offset: -3px;
  box-shadow: inset 0 0 0 1px rgba(74, 158, 255, 0.6),
              inset 0 0 18px rgba(74, 158, 255, 0.35);
}

.plot-pane-badge {
  position: absolute;
  top: 4px;
  left: 4px;
  z-index: 6;
  padding: 1px 7px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #0b1018;
  background: #4a9eff;
  border-radius: 3px;
  pointer-events: none;
}

.plot-pane-empty,
.plot-pane-hint {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #475569;
  font-size: 0.82rem;
  text-align: center;
  padding: 1rem;
  pointer-events: none;
}
.plot-pane-hint { top: auto; bottom: 0.6rem; transform: translateX(-50%); }

.plot-pane-overlay {
  position: absolute;
  top: 4px;
  right: 4px;
  display: flex;
  gap: 2px;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.12s;
}
.plot-pane:hover .plot-pane-overlay,
.plot-pane-selected .plot-pane-overlay {
  opacity: 1;
}

.plot-pane-btn {
  background: #1e293b;
  border: 1px solid #2d3748;
  color: #94a3b8;
  cursor: pointer;
  font-size: 0.8rem;
  line-height: 1;
  padding: 3px 6px;
  border-radius: 3px;
}
.plot-pane-btn:hover { color: #e2e8f0; border-color: #4a9eff; }
.plot-pane-btn:disabled { opacity: 0.35; cursor: default; }

/* ── Control logic editor (server-side flows) ──────────────────────────────── */
.cl-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 600;
}

.cl-modal {
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 10px;
  width: min(1200px, 97vw);
  height: min(820px, 95vh);
  display: flex;
  flex-direction: column;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.cl-modal-full {
  width: 98vw;
  height: 96vh;
  max-width: none;
  max-height: none;
}

.cl-confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 650;
}

.cl-confirm {
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  width: min(440px, 92vw);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
}

.cl-confirm-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.cl-confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.cl-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

/* ── Audit log viewer ──────────────────────────────────────────────────── */
.audit-modal {
  width: min(1300px, 98vw);
}

.audit-filters {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.audit-filter {
  background: #0f1420;
  border: 1px solid #2d3748;
  border-radius: 5px;
  color: #e2e8f0;
  padding: 0.3rem 0.5rem;
  font-size: 0.8rem;
}

.audit-filter-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: #94a3b8;
}

.audit-body {
  flex: 1;
  overflow: auto;
  padding: 0 0 0.5rem;
}

.audit-empty {
  padding: 1.5rem 1.25rem;
}

.audit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.audit-table th,
.audit-table td {
  text-align: left;
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid #232b3a;
  white-space: nowrap;
}

.audit-table th {
  position: sticky;
  top: 0;
  background: #161c2a;
  color: #94a3b8;
  font-weight: 600;
  z-index: 1;
}

.audit-table tbody tr:hover {
  background: #1d2433;
}

.audit-row-error td {
  background: rgba(220, 38, 38, 0.08);
}

.audit-time {
  color: #94a3b8;
  font-variant-numeric: tabular-nums;
}

.audit-signal,
.audit-detail {
  max-width: 18rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.audit-value {
  max-width: 10rem;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: ui-monospace, monospace;
}

.audit-actor-tag {
  display: inline-block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.05rem 0.35rem;
  border-radius: 3px;
  vertical-align: middle;
}

.audit-actor-user {
  background: #1e3a5f;
  color: #93c5fd;
}

.audit-actor-system {
  background: #4a2d6b;
  color: #d8b4fe;
}

.audit-result-ok {
  color: #4ade80;
}

.audit-result-err {
  color: #f87171;
  font-weight: 600;
}

.cl-title {
  font-size: 1rem;
  font-weight: 700;
  color: #e2e8f0;
}

.cl-subtitle { font-size: 0.8rem; }

.cl-header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cl-dirty {
  font-size: 0.75rem;
  color: #fbbf24;
}

.cl-error {
  padding: 0.5rem 1.25rem;
  background: #3b1d1d;
  color: #fca5a5;
  font-size: 0.82rem;
  border-bottom: 1px solid #5b2a2a;
  flex-shrink: 0;
}

.cl-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.cl-list {
  width: 230px;
  min-width: 230px;
  border-right: 1px solid #2d3748;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

.cl-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #2d3748;
  font-weight: 600;
  color: #94a3b8;
  font-size: 0.85rem;
}

.cl-list-empty { padding: 0.75rem; font-size: 0.8rem; }

.cl-list-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  border-bottom: 1px solid #232a3a;
}
.cl-list-item:hover { background: #232a3a; }
.cl-list-item-active { background: #2a3450; }

.cl-status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #475569;
  flex-shrink: 0;
}
.cl-status-on { background: #34d399; box-shadow: 0 0 5px #34d399; }

.cl-list-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #e2e8f0;
  font-size: 0.85rem;
}

.cl-mini-btn {
  color: #64748b;
  font-size: 0.8rem;
  padding: 1px 4px;
  border-radius: 3px;
  flex-shrink: 0;
}
.cl-mini-btn:hover { color: #e2e8f0; background: #1a1f2e; }

.cl-editor-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cl-empty {
  padding: 1.5rem;
  font-size: 0.85rem;
}

.cl-graph-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid #2d3748;
  flex-shrink: 0;
}

.cl-name-input { width: 240px; }

.cfg-desc {
  width: 100%;
  box-sizing: border-box;
  resize: vertical;
  min-height: 2.4rem;
  max-height: 6.5rem;
  font-family: inherit;
  line-height: 1.4;
}

.cl-enable {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: #cbd5e1;
  font-size: 0.85rem;
  white-space: nowrap;
}

/* ── Logic dialogs (action.dialog.* user interaction) ──────────────────────── */
.logic-dialog-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 700;
}

.logic-dialog {
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-top: 3px solid #4a9eff;
  border-radius: 8px;
  min-width: 320px;
  max-width: 460px;
  padding: 1rem 1.25rem 0.9rem;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
}
.logic-dialog-error { border-top-color: #ef4444; }
.logic-dialog-setpoint { border-top-color: #34d399; }

.logic-dialog-header {
  font-size: 0.95rem;
  font-weight: 700;
  color: #e2e8f0;
  margin-bottom: 0.5rem;
}
.logic-dialog-error .logic-dialog-header { color: #fca5a5; }

.logic-dialog-message {
  color: #cbd5e1;
  font-size: 0.85rem;
  line-height: 1.4;
  white-space: pre-wrap;
  margin-bottom: 0.75rem;
}

.logic-dialog-input {
  width: 100%;
  margin-bottom: 0;
}

/* A single field row (input or display) in a multi-value dialog. */
.logic-dialog-field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-bottom: 0.6rem;
}
.logic-dialog-label {
  font-size: 0.8rem;
  color: #94a3b8;
}
.logic-dialog-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: #e2e8f0;
  padding: 0.2rem 0;
}

.logic-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}
.logic-dialog-actions .panel-btn { flex: 0 0 auto; min-width: 5rem; }

.panel-btn-primary {
  background: #2563eb;
}
.panel-btn-primary:hover { background: #3b82f6; }

/* ── Configuration manager ─────────────────────────────────────────────── */
.cfg-tabs {
  display: flex;
  gap: 0.25rem;
  margin-left: 0.5rem;
}
.cfg-tab {
  background: transparent;
  border: 1px solid transparent;
  color: #94a3b8;
  font-size: 0.82rem;
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
}
.cfg-tab:hover { color: #e2e8f0; background: #232a3a; }
.cfg-tab-active {
  color: #e2e8f0;
  background: #2d3748;
  border-color: #3d4a63;
}
.cfg-badge {
  display: inline-block;
  min-width: 1.1rem;
  text-align: center;
  font-size: 0.7rem;
  color: #94a3b8;
  background: #232a3a;
  border-radius: 8px;
  padding: 0 0.35rem;
  margin-left: 0.4rem;
}

.cfg-editor {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  overflow-y: auto;
  height: 100%;
}
.cfg-edit-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cfg-edit-bar .panel-btn { flex: 0 0 auto; }

.cfg-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid #2d3748;
  font-size: 0.82rem;
  font-weight: 600;
  color: #cbd5e1;
}
.cfg-section-head .panel-btn { flex: 0 0 auto; }

.cfg-params {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.cfg-param {
  background: #151a26;
  border: 1px solid #232a3a;
  border-radius: 6px;
  padding: 0.5rem;
  position: relative;
}
.cfg-param-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: flex-end;
}
.cfg-field {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}
.cfg-field > label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #64748b;
}
.cfg-field-key { width: 8rem; }
.cfg-field-label { flex: 1; min-width: 8rem; }
.cfg-field-type { width: 7rem; }
.cfg-field-target { flex: 2; min-width: 12rem; }
.cfg-field-default { width: 8rem; }
.cfg-field-enum { flex: 1; min-width: 10rem; }
.cfg-field-num { width: 6rem; }

.cfg-mandatory {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: #94a3b8;
  white-space: nowrap;
  padding-bottom: 0.25rem;
}
.cfg-param-del {
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  font-size: 1rem;
  padding: 0 0.25rem;
}
.cfg-param-del:hover { color: #f87171; }

.cfg-unit {
  font-size: 0.72rem;
  color: #64748b;
  margin-left: 0.25rem;
}

.cfg-list-actions {
  display: flex;
  gap: 0.35rem;
  flex: 0 0 auto;
}

/* Type is auto-derived from the bound signal — shown read-only. */
.cfg-type-ro {
  display: flex;
  align-items: center;
  height: 1.9rem;
  padding: 0 0.5rem;
  border: 1px dashed #2d3748;
  border-radius: 4px;
  background: #11151f;
  color: #94a3b8;
  font-size: 0.8rem;
  white-space: nowrap;
}

/* ── Parameter tree (group / subgroup organiser) ─────────────────────────── */
.cfg-tree {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.cfg-tree-toolbar {
  display: flex;
  gap: 0.4rem;
}
.cfg-tree-group {
  border: 1px solid #232a3a;
  border-radius: 6px;
  background: #12161f;
}
.cfg-tree-ghead {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.5rem;
  background: #1a2030;
  border-bottom: 1px solid #232a3a;
  border-radius: 6px 6px 0 0;
}
.cfg-tree-glabel {
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
  flex: 1;
}
.cfg-tree-name {
  flex: 1;
  min-width: 0;
  font-weight: 600;
}
.cfg-tree-ghead-actions {
  display: flex;
  gap: 0.3rem;
  flex: 0 0 auto;
}
.cfg-tree-sub {
  margin: 0.3rem 0 0.3rem 0.75rem;
  border-left: 2px solid #232a3a;
}
.cfg-tree-shead {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.5rem;
}
.cfg-tree-sicon { color: #475569; }
.cfg-tree-items {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.3rem 0.5rem 0.4rem;
}
.cfg-tree-param {
  border: 1px solid #232a3a;
  border-radius: 5px;
  background: #151a26;
}
.cfg-tree-param.dragging { opacity: 0.45; }
.cfg-tree-param.drop-over { border-top: 2px solid #8b5cf6; }
.cfg-tree-ghead.drop-over,
.cfg-tree-shead.drop-over { outline: 2px dashed #8b5cf6; outline-offset: -2px; }
.cfg-tree-phead {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.5rem;
  cursor: grab;
}
.cfg-tree-phead:active { cursor: grabbing; }
.cfg-drag-handle {
  color: #475569;
  cursor: grab;
  font-size: 0.9rem;
  user-select: none;
}
.cfg-tree-toggle {
  background: transparent;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0 0.15rem;
}
.cfg-tree-pkey {
  font-family: var(--mono, monospace);
  font-size: 0.8rem;
  color: #e2e8f0;
}
.cfg-tree-plabel { font-size: 0.78rem; color: #94a3b8; }
.cfg-tree-ptype {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #818cf8;
  border: 1px solid #2d3748;
  border-radius: 3px;
  padding: 0 0.3rem;
}
.cfg-tree-psig { margin-left: auto; font-size: 0.72rem; }

/* ── Instance values ───────────────────────────────────────────────────── */
.cfg-values {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.cfg-value-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.3rem 0.4rem;
  border-radius: 5px;
}
.cfg-value-row:hover { background: #151a26; }
.cfg-value-label {
  width: 14rem;
  flex: 0 0 auto;
  font-size: 0.82rem;
  color: #cbd5e1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.cfg-req { color: #f87171; margin-left: 0.15rem; }
.cfg-value-input { width: 10rem; flex: 0 0 auto; }
/* Constrain the editing control to its column so it can't overflow and cover
   the adjacent signal-name label. */
.cfg-value-input .prop-input,
.cfg-value-input .prop-select { width: 100%; box-sizing: border-box; }
.cfg-value-target {
  flex: 0 1 auto;
  min-width: 0;
  font-size: 0.72rem;
  color: #64748b;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Apply result ──────────────────────────────────────────────────────── */
.cfg-apply-result {
  border: 1px solid #232a3a;
  border-radius: 6px;
  margin-top: 0.5rem;
  overflow: hidden;
}
.cfg-apply-head {
  display: flex;
  gap: 1rem;
  padding: 0.4rem 0.6rem;
  background: #151a26;
  font-size: 0.8rem;
  color: #cbd5e1;
}
.cfg-apply-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}
.cfg-apply-table th,
.cfg-apply-table td {
  text-align: left;
  padding: 0.25rem 0.6rem;
  border-top: 1px solid #1e2433;
}
.cfg-apply-table th { color: #64748b; font-weight: 500; }
.cfg-ok { color: #4ade80; }
.cfg-fail { color: #f87171; }

/* ── Version panel ─────────────────────────────────────────────────────── */
.cfg-versions {
  border-top: 1px solid #2d3748;
  margin-top: 0.5rem;
  padding-top: 0.4rem;
}
.cfg-versions-toggle {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.2rem 0;
}
.cfg-versions-toggle:hover { color: #e2e8f0; }
.cfg-versions-body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.4rem;
}
.cfg-version-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.25rem 0.4rem;
  border: 1px solid #232a3a;
  border-radius: 5px;
  font-size: 0.78rem;
}
.cfg-version-current {
  border-color: #2563eb;
  background: #15203a;
}
.cfg-version-num { font-weight: 600; color: #cbd5e1; min-width: 3rem; }
.cfg-version-tag { color: #94a3b8; flex: 1; }
.cfg-version-time { color: #64748b; font-size: 0.72rem; }
.cfg-compare {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: #94a3b8;
}

/* ── Diff modal ────────────────────────────────────────────────────────── */
.cfg-diff-modal {
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 10px;
  width: min(760px, 92vw);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
}
.cfg-diff-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid #2d3748;
  font-size: 0.85rem;
  color: #e2e8f0;
}
.cfg-diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  overflow-y: auto;
}
.cfg-diff-table th,
.cfg-diff-table td {
  text-align: left;
  padding: 0.3rem 0.7rem;
  border-top: 1px solid #1e2433;
  vertical-align: top;
}
.cfg-diff-table th { color: #64748b; font-weight: 500; }
.cfg-diff-status {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.cfg-diff-added { background: rgba(34, 197, 94, 0.08); }
.cfg-diff-added .cfg-diff-status { color: #4ade80; }
.cfg-diff-removed { background: rgba(239, 68, 68, 0.08); }
.cfg-diff-removed .cfg-diff-status { color: #f87171; }
.cfg-diff-changed { background: rgba(234, 179, 8, 0.08); }
.cfg-diff-changed .cfg-diff-status { color: #facc15; }
.cfg-diff-unchanged .cfg-diff-status { color: #64748b; }

/* ── Version history tree (slick git-style pane) ───────────────────────────── */
.ver-tree {
  display: flex;
  flex-direction: column;
  font-size: 0.78rem;
}
.ver-empty { padding: 0.4rem 0; }
.ver-node {
  display: flex;
  align-items: stretch;
  gap: 0.6rem;
  min-height: 2rem;
}
/* The rail holds the circle and the connector line to the next node below. */
.ver-rail {
  position: relative;
  flex: 0 0 16px;
  display: flex;
  justify-content: center;
}
.ver-dot {
  position: relative;
  z-index: 1;
  width: 10px;
  height: 10px;
  margin-top: 0.45rem;
  border-radius: 50%;
  border: 2px solid #475569;
  background: #1a1f2e;
  box-sizing: border-box;
  flex: 0 0 auto;
}
/* Selected (the revision that is executed/shown) → filled. */
.ver-dot-current { background: #2563eb; border-color: #2563eb; }
/* Active (the revision currently viewed/edited) → larger. */
.ver-dot-active {
  width: 16px;
  height: 16px;
  margin-top: 0.3rem;
  border-color: #60a5fa;
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.18);
}
.ver-dot-unsaved { background: transparent; border-style: dashed; border-color: #f59e0b; }
.ver-line {
  position: absolute;
  top: 0.45rem;
  bottom: -0.55rem;
  width: 2px;
  background: #2d3748;
  z-index: 0;
}
.ver-line-dashed {
  background: repeating-linear-gradient(to bottom, #f59e0b 0, #f59e0b 3px, transparent 3px, transparent 6px);
}
.ver-body {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 1;
  padding: 0.3rem 0;
  border-bottom: 1px solid #1a2030;
  min-width: 0;
}
.ver-node-active .ver-body { background: rgba(96, 165, 250, 0.05); border-radius: 4px; }
.ver-num {
  background: transparent;
  border: none;
  color: #cbd5e1;
  font-weight: 600;
  cursor: pointer;
  min-width: 2.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0;
}
.ver-num:hover { color: #fff; }
.ver-badge {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: #2563eb;
  color: #fff;
  border-radius: 3px;
  padding: 0.05rem 0.3rem;
}
.ver-badge-view { background: #475569; }
.ver-tag { color: #94a3b8; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ver-time { color: #64748b; font-size: 0.7rem; white-space: nowrap; }
.ver-actions { display: flex; gap: 0.3rem; flex: 0 0 auto; }
.ver-unsaved .ver-num, .ver-node-unsaved .ver-num { color: #f59e0b; font-weight: 500; font-style: italic; }
.ver-compare {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
  padding-top: 0.45rem;
  border-top: 1px solid #2d3748;
  color: #94a3b8;
}

/* ── Version pane wrappers (embedded sidebars in the editors) ──────────────── */
/* Control-logic editor: FlowEditor + history sidebar side by side. */
.cl-editor-main {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}
.cl-editor-main .flow-editor { flex: 1; min-width: 0; }
.ver-pane {
  flex: 0 0 20rem;
  display: flex;
  flex-direction: column;
  overflow: auto;
  padding: 0.75rem 0.9rem;
  border-left: 1px solid #2d3748;
  background: #11151f;
}
.ver-pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 0.6rem;
}
/* Synthetic editor: history floats over the right edge of the modal. */
.synth-ver-pane {
  position: absolute;
  top: 3rem;
  right: 0;
  bottom: 3.2rem;
  z-index: 5;
  box-shadow: -6px 0 18px rgba(0, 0, 0, 0.35);
}

/* ── Version diff viewer (unified / side-by-side text diff) ────────────────── */
.ver-diff-modal {
  background: #1a1f2e;
  border: 1px solid #2d3748;
  border-radius: 10px;
  width: min(1100px, 96vw);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
}
.ver-diff-head {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid #2d3748;
  font-size: 0.85rem;
  color: #e2e8f0;
}
.ver-diff-head .cl-confirm-title { flex: 1; }
.ver-diff-stats { font-family: ui-monospace, monospace; font-size: 0.78rem; }
.ver-diff-add { color: #4ade80; }
.ver-diff-del { color: #f87171; }
.ver-diff-modes { display: flex; gap: 0.3rem; }
.ver-diff-loading { padding: 1rem; }
.ver-diff {
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.74rem;
  line-height: 1.45;
}
.ver-diff-row { display: flex; white-space: pre; }
.ver-diff-ln {
  flex: 0 0 3rem;
  text-align: right;
  padding: 0 0.5rem;
  color: #475569;
  user-select: none;
  background: #151a27;
}
.ver-diff-sign { flex: 0 0 1.2rem; text-align: center; color: #64748b; }
.ver-diff-text { flex: 1; padding-right: 1rem; }
.ver-diff-add { background: rgba(34, 197, 94, 0.12); }
.ver-diff-del { background: rgba(239, 68, 68, 0.12); }
.ver-diff-equal { color: #94a3b8; }
.ver-diff-row.ver-diff-add .ver-diff-text { color: #bbf7d0; }
.ver-diff-row.ver-diff-del .ver-diff-text { color: #fecaca; }
/* Side-by-side grid */
.ver-diff-splitrow { display: grid; grid-template-columns: 3rem 1fr 3rem 1fr; white-space: pre; }
.ver-diff-cell { padding: 0 0.6rem; min-width: 0; overflow-x: hidden; }
.ver-diff-cell.ver-diff-add { background: rgba(34, 197, 94, 0.12); color: #bbf7d0; }
.ver-diff-cell.ver-diff-del { background: rgba(239, 68, 68, 0.12); color: #fecaca; }
.ver-diff-cell.ver-diff-equal { color: #94a3b8; }
.ver-diff-cell.ver-diff-empty { background: #141824; }

/* ── Config manager: array value editor ────────────────────────────────── */
.cfg-value-input-array { width: auto; flex: 1; }
.cfg-array { display: flex; flex-direction: column; gap: 0.35rem; }
.cfg-array-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.cfg-spark {
  background: #0f1117;
  border: 1px solid #232a3a;
  border-radius: 4px;
  flex: 0 0 auto;
}
.cfg-array-info { flex: 0 0 auto; min-width: 4rem; }

.cfg-array-table {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.4rem;
  background: #0f1117;
  border: 1px solid #232a3a;
  border-radius: 5px;
  max-height: 12rem;
  overflow-y: auto;
}
.cfg-array-pt {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.cfg-array-idx { width: 2rem; text-align: right; flex: 0 0 auto; }
.cfg-array-pt .prop-input { width: 7rem; flex: 0 0 auto; }

.cfg-array-csv {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.4rem;
  background: #0f1117;
  border: 1px solid #232a3a;
  border-radius: 5px;
}
.cfg-array-textarea {
  width: 100%;
  resize: vertical;
  font-family: ui-monospace, monospace;
  flex: none;
}

.cfg-array-plot-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem;
}
.cfg-array-stats {
  display: flex;
  gap: 1.25rem;
  font-size: 0.8rem;
}

/* Invalid value highlighting */
.cfg-value-invalid .cfg-value-label { color: #fca5a5; }
.cfg-value-err { color: #f87171; cursor: help; margin-left: 0.25rem; }