:root {
  --bg: #fdfdfe;
  --bg-elev: #ffffff;
  --bg-subtle: #f3f6fc;
  --bg-chip: #eef3fb;
  --ink: #0b2258;
  --ink-2: #365084;
  --ink-muted: #687da6;
  --line: #cbd6ec;
  --line-strong: #0b3aa8;
  --grid-dot: #d6dff0;

  --blue: #0b3aa8;
  --blue-fill: #e3ecff;
  --blue-mid: #bfd3ff;

  --teal: #0e95a3;
  --teal-fill: #dcf5f7;
  --emerald: #0c8a58;
  --emerald-fill: #ddf5ea;
  --amber: #d98200;
  --amber-fill: #fff1d6;
  --purple: #5b3ec8;
  --purple-fill: #ede8ff;
  --crimson: #c93b2b;

  --shadow-sm: 0 2px 8px rgba(11, 34, 88, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 34, 88, 0.10);
  --font-sans: "Noto Sans CJK TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Iosevka", ui-monospace, SFMono-Regular, Menlo, monospace;
}

html[data-theme="dark"] {
  --bg: #0b1020;
  --bg-elev: #111931;
  --bg-subtle: #16203d;
  --bg-chip: #1b284c;
  --ink: #e8eefc;
  --ink-2: #a9bce2;
  --ink-muted: #6c82b0;
  --line: #24345c;
  --line-strong: #6ea2ff;
  --grid-dot: #1f2d52;

  --blue: #6ea2ff;
  --blue-fill: #172952;
  --blue-mid: #233f7c;

  --teal: #2fd0df;
  --teal-fill: #113542;
  --emerald: #2fd18c;
  --emerald-fill: #11382d;
  --amber: #f7b23b;
  --amber-fill: #3a2b12;
  --purple: #a58cff;
  --purple-fill: #261f4a;
  --crimson: #ff6b5b;

  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.50);
}

:root,
html[data-fontsize="md"] {
  --font-scale: 1;
  --svg-font-scale: 1;
  --panel-w: 410px;
}

html[data-fontsize="sm"] {
  --font-scale: 0.90;
  --svg-font-scale: 0.94;
  --panel-w: 390px;
}

html[data-fontsize="lg"] {
  --font-scale: 1.15;
  --svg-font-scale: 1.08;
  --panel-w: 455px;
}

html[data-fontsize="xl"] {
  --font-scale: 1.30;
  --svg-font-scale: 1.16;
  --panel-w: 495px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow-x: clip;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: calc(14px * var(--font-scale, 1));
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  grid-template-columns: minmax(0, 1fr);
  width: 100%;
  max-width: 100vw;
  height: 100dvh;
  overflow: hidden;
}

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 16px;
  min-width: 0;
  background: var(--bg-elev);
  border-bottom: 1.5px solid var(--line);
  z-index: 20;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.fontsize-switch {
  display: inline-flex;
  align-items: center;
  background: var(--bg-subtle);
  border: 1.5px solid var(--line);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

.fs-btn {
  border: none;
  background: transparent;
  color: var(--ink-2);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  line-height: 1.2;
  transition: background 0.15s, color 0.15s;
}

.fs-btn:hover {
  color: var(--ink);
  background: var(--bg-chip);
}

.fs-btn.is-active {
  background: var(--line-strong);
  color: #ffffff;
}

html[data-theme="dark"] .fs-btn.is-active {
  color: #081024;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  flex-shrink: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 2;
}

.brand-cube-top { fill: var(--blue-fill); }
.brand-cube-l { fill: var(--blue-mid); }
.brand-cube-r { fill: var(--line-strong); }

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-family: var(--font-mono);
  font-size: calc(14px * var(--font-scale, 1));
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--line-strong);
}

.brand-text strong em {
  font-style: normal;
  font-weight: 600;
  color: var(--teal);
}

.brand-text small {
  font-size: calc(11px * var(--font-scale, 1));
  color: var(--ink-muted);
  letter-spacing: 0.03em;
}

.flow-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.flow-tabs::-webkit-scrollbar { display: none; }

.flow-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border: 1.5px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--font-sans);
  font-size: calc(13px * var(--font-scale, 1));
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s, transform 0.1s;
}

.flow-tab:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.flow-tab.is-active {
  background: var(--line-strong);
  border-color: var(--line-strong);
  color: #ffffff;
}
html[data-theme="dark"] .flow-tab.is-active {
  color: #081024;
}

.flow-tab-no {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 700;
  opacity: 0.78;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--line);
  border-radius: 6px;
  background: var(--bg-elev);
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}
.icon-btn:hover {
  border-color: var(--line-strong);
  background: var(--bg-subtle);
}
.icon-btn:active {
  transform: translateY(1px);
}
.icon-btn svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Live Meters Bar (WareTrack style KPI strip) ─────────── */
.meters {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  min-width: 0;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  min-height: 44px;
}

.meter-card {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 11px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  transition: border-color 0.2s, background 0.2s;
}

.meter-card.is-changed {
  border-color: var(--teal);
  background: var(--teal-fill);
}

.meter-card.is-warn {
  border-color: var(--crimson);
}

.meter-label {
  font-size: calc(11.5px * var(--font-scale, 1));
  font-weight: 600;
  color: var(--ink-2);
}

.meter-val {
  font-family: var(--font-mono);
  font-size: calc(14px * var(--font-scale, 1));
  font-weight: 800;
  color: var(--ink);
}

.meter-unit {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  color: var(--ink-muted);
}

.meter-delta {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
}
.meter-delta.up {
  color: var(--emerald);
  background: var(--emerald-fill);
}
.meter-delta.down {
  color: var(--amber);
  background: var(--amber-fill);
}

.meters-overview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--ink-2);
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.filter-pill.is-active {
  border-color: var(--line-strong);
  background: var(--blue-fill);
  color: var(--line-strong);
}
.filter-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.search-box input {
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: calc(12.5px * var(--font-scale, 1));
  width: 210px;
  outline: none;
}

/* ── Main Workspace ─────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--panel-w, 410px);
  min-height: 0;
  position: relative;
}

.stage {
  position: relative;
  overflow: hidden;
  background: var(--bg);
  user-select: none;
}

#scene {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  touch-action: none;
}
#scene:active {
  cursor: grabbing;
}

.grid-dot {
  fill: var(--grid-dot);
}
.arrow-head {
  fill: var(--line-strong);
}
.arrow-head-exception {
  fill: var(--crimson);
}

/* ── Isometric SVG Scene Elements ───────────────────────── */
.iso-district {
  cursor: pointer;
  transition: opacity 0.2s;
}
.iso-district-slab {
  stroke-width: 1.6;
  stroke-dasharray: 5 4;
  transition: fill 0.2s, stroke-width 0.2s;
}
.iso-district:hover .iso-district-slab {
  stroke-width: 2.4;
  stroke-dasharray: none;
}
.iso-district-label {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--svg-font-scale, 1));
  font-weight: 800;
  letter-spacing: 0.06em;
  fill: var(--ink-2);
  pointer-events: none;
}
.iso-district-sub {
  font-family: var(--font-sans);
  font-size: calc(10px * var(--svg-font-scale, 1));
  font-weight: 600;
  fill: var(--ink-muted);
  pointer-events: none;
}

/* Edges */
.iso-edge {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.35;
  stroke-dasharray: 4 4;
  opacity: 0.55;
  transition: opacity 0.2s, stroke 0.2s, stroke-width 0.2s;
  pointer-events: none;
}
.iso-edge.is-related {
  stroke: var(--line-strong);
  stroke-width: 2.2;
  stroke-dasharray: none;
  opacity: 0.95;
}
.iso-edge.is-dimmed {
  opacity: 0.12;
}

.iso-flow-trace {
  fill: none;
  stroke-width: 2.6;
  stroke-linecap: round;
}
.iso-flow-trace.kind-doc {
  stroke: var(--teal);
  stroke-dasharray: 6 5;
  animation: dashMove 0.9s linear infinite;
}
.iso-flow-trace.kind-goods {
  stroke: var(--amber);
}
.iso-flow-trace.kind-money {
  stroke: var(--emerald);
  stroke-dasharray: 8 4;
  animation: dashMove 0.9s linear infinite;
}
.iso-flow-trace.kind-exception {
  stroke: var(--crimson);
  stroke-dasharray: 7 4;
  stroke-width: 3;
  animation: dashMoveReverse 0.7s linear infinite;
}
.iso-flow-trace.is-past {
  stroke: var(--line-strong);
  stroke-width: 1.8;
  stroke-dasharray: 3 4;
  opacity: 0.48;
  animation: none;
}

@keyframes dashMove {
  to { stroke-dashoffset: -22; }
}

@keyframes dashMoveReverse {
  to { stroke-dashoffset: 22; }
}

/* Isometric Building Nodes */
.iso-node {
  cursor: pointer;
  transition: opacity 0.2s, transform 0.18s;
}
.iso-node.is-dimmed {
  opacity: 0.22;
}
.iso-node .b-shadow {
  fill: rgba(11, 34, 88, 0.10);
  transition: transform 0.18s;
}
.iso-node .b-top,
.iso-node .b-left,
.iso-node .b-right,
.iso-node .b-roof {
  stroke: var(--line-strong);
  stroke-width: 1.5;
  stroke-linejoin: round;
  transition: fill 0.18s, stroke-width 0.18s;
}
.iso-node .b-detail {
  stroke: var(--line-strong);
  stroke-width: 1.1;
  fill: none;
  opacity: 0.7;
}

.iso-node:hover,
.iso-node.is-selected {
  transform: translateY(-4px);
}
.iso-node.is-selected .b-top,
.iso-node.is-selected .b-left,
.iso-node.is-selected .b-right {
  stroke-width: 2.5;
}

.iso-node-ring {
  fill: none;
  stroke: var(--teal);
  stroke-width: 2.4;
  opacity: 0;
  pointer-events: none;
}
.iso-node.is-selected .iso-node-ring,
.iso-node.is-endpoint .iso-node-ring {
  opacity: 1;
}

.iso-code-pill {
  fill: var(--line-strong);
}
.iso-code-text {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 800;
  fill: #ffffff;
  text-anchor: middle;
  dominant-baseline: central;
}
html[data-theme="dark"] .iso-code-text {
  fill: #081024;
}

.iso-node-title {
  font-family: var(--font-sans);
  font-size: calc(11.5px * var(--svg-font-scale, 1));
  font-weight: 700;
  fill: var(--ink);
  text-anchor: middle;
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: 3.5px;
  stroke-linejoin: round;
}
.iso-node-dept {
  font-family: var(--font-sans);
  font-size: calc(9.5px * var(--svg-font-scale, 1));
  font-weight: 600;
  fill: var(--ink-muted);
  text-anchor: middle;
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: 3px;
}

/* Floating Packet Callout (Protocol Explorer SERVER HELLO card style) */
.overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.packet-card {
  position: absolute;
  left: 16px;
  top: 16px;
  width: min(calc(330px * var(--font-scale, 1)), calc(100% - 32px));
  background: var(--bg-elev);
  border: 2px solid var(--teal);
  border-radius: 6px;
  box-shadow: var(--shadow-md);
  pointer-events: auto;
  overflow: hidden;
}
.packet-card.kind-goods { border-color: var(--amber); }
.packet-card.kind-money { border-color: var(--emerald); }
.packet-card.kind-exception { border-color: var(--crimson); }

.packet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 10px;
  background: var(--teal);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: calc(11.5px * var(--font-scale, 1));
  font-weight: 800;
  letter-spacing: 0.04em;
}
.packet-card.kind-goods .packet-head { background: var(--amber); color: #1b1200; }
.packet-card.kind-money .packet-head { background: var(--emerald); color: #ffffff; }
.packet-card.kind-exception .packet-head { background: var(--crimson); color: #ffffff; }

.packet-body {
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: calc(11.5px * var(--font-scale, 1));
  line-height: 1.45;
  color: var(--ink);
}
.packet-route {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: calc(12.5px * var(--font-scale, 1));
  margin-bottom: 5px;
  color: var(--ink);
}
.packet-kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  color: var(--ink-2);
}
.packet-kv dt {
  color: var(--ink-muted);
}
.packet-kv dd {
  margin: 0;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

/* Stage controls & Legend */
.stage-tools {
  position: absolute;
  right: 14px;
  top: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 5;
}

.legend {
  position: absolute;
  left: 14px;
  bottom: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 6px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 600;
  color: var(--ink-2);
}
.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.lg {
  display: inline-block;
  width: 18px;
  height: 3px;
  border-radius: 2px;
}
.lg-doc { background: var(--teal); }
.lg-goods { background: var(--amber); }
.lg-money { background: var(--emerald); }
.lg-exception {
  background: var(--crimson);
  background-image: repeating-linear-gradient(90deg, var(--crimson), var(--crimson) 4px, transparent 4px, transparent 7px);
}

/* ── Blast Radius / Impact Inspection ─────────────────────── */
.iso-node.is-impact-focus {
  filter: drop-shadow(0 0 10px rgba(91, 62, 200, 0.85));
}
.iso-node.is-impact-focus .iso-node-ring {
  stroke: var(--purple);
  opacity: 1;
  stroke-width: 3.2;
}

.iso-node.is-impact-upstream {
  filter: drop-shadow(0 0 8px rgba(14, 149, 163, 0.85));
}
.iso-node.is-impact-upstream .iso-node-ring {
  stroke: var(--teal);
  opacity: 1;
  stroke-width: 2.8;
}

.iso-node.is-impact-downstream {
  filter: drop-shadow(0 0 8px rgba(217, 130, 0, 0.9));
}
.iso-node.is-impact-downstream .iso-node-ring {
  stroke: var(--amber);
  opacity: 1;
  stroke-width: 2.8;
}

.iso-edge.is-impact-upstream {
  stroke: var(--teal);
  stroke-width: 2.4;
  stroke-dasharray: none;
  opacity: 0.95;
}

.iso-edge.is-impact-downstream {
  stroke: var(--amber);
  stroke-width: 2.4;
  stroke-dasharray: none;
  opacity: 0.95;
}

/* ── What-If Scenario UI Components ────────────────────────── */
.whatif-box {
  background: linear-gradient(135deg, rgba(201, 59, 43, 0.06), rgba(217, 130, 0, 0.05));
  border: 1.5px solid rgba(201, 59, 43, 0.35);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.whatif-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.whatif-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 800;
  color: var(--crimson);
  background: rgba(201, 59, 43, 0.12);
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.03em;
}
.whatif-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 700;
  border-radius: 6px;
  border: 1.5px solid var(--crimson);
  background: var(--bg-elev);
  color: var(--crimson);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.whatif-toggle-btn:hover {
  background: rgba(201, 59, 43, 0.08);
}
.whatif-toggle-btn.is-active {
  background: var(--crimson);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(201, 59, 43, 0.35);
}
.whatif-detail-grid {
  display: grid;
  gap: 6px;
  font-size: calc(11.5px * var(--font-scale, 1));
}
.whatif-alert {
  padding: 8px 10px;
  background: rgba(201, 59, 43, 0.1);
  border-left: 3px solid var(--crimson);
  border-radius: 4px;
  font-size: calc(12px * var(--font-scale, 1));
  color: var(--ink);
  line-height: 1.45;
}
.cross-impact-card {
  border: 1px dashed var(--line);
  background: var(--bg-subtle);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: calc(11.5px * var(--font-scale, 1));
}
.cross-impact-card h5 {
  margin: 0 0 4px;
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 800;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Sign-off / Approval Gatekeeper UI ────────────────────── */
.approval-gate-box {
  border: 1.5px solid var(--amber);
  background: var(--amber-fill);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.2s ease;
}
.approval-gate-box.is-approved {
  border-color: var(--emerald);
  background: var(--emerald-fill);
}
.approval-gate-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 800;
  color: var(--ink);
}
.approval-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(217, 130, 0, 0.2);
  color: var(--amber);
}
.approval-gate-box.is-approved .approval-status-pill {
  background: rgba(12, 138, 88, 0.2);
  color: var(--emerald);
}
.approval-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 8px 14px;
  font-size: calc(13px * var(--font-scale, 1));
  font-weight: 800;
  border-radius: 6px;
  border: none;
  background: var(--emerald);
  color: #ffffff;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(12, 138, 88, 0.3);
  transition: transform 0.12s, opacity 0.15s, background 0.15s;
}
.approval-btn:hover {
  opacity: 0.94;
  transform: translateY(-1px);
}
.approval-btn:active {
  transform: translateY(0);
}
.approval-btn.secondary {
  background: var(--bg-elev);
  color: var(--ink-2);
  border: 1px solid var(--line);
  box-shadow: none;
  font-size: calc(11.5px * var(--font-scale, 1));
  padding: 5px 10px;
  width: auto;
}
.packet-approve-btn {
  margin-top: 7px;
  width: 100%;
  padding: 5px 10px;
  font-size: calc(11.5px * var(--font-scale, 1));
  font-weight: 800;
  border-radius: 4px;
  border: none;
  background: var(--emerald);
  color: #ffffff;
  cursor: pointer;
}
.icon-btn.is-locked {
  border-color: var(--amber);
  color: var(--amber);
  opacity: 0.65;
}
@keyframes gatePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); box-shadow: 0 0 0 4px rgba(217, 130, 0, 0.35); }
}
.approval-gate-box.is-nudged {
  animation: gatePulse 0.45s ease 2;
}

/* ── 面板頂部導航列與歷程導航 (Navigation Bar & Breadcrumbs) ── */
.panel-nav-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1.5px solid var(--line);
  margin-bottom: 2px;
}

.panel-nav-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  font-size: calc(11.5px * var(--font-scale, 1));
  font-weight: 700;
  border-radius: 6px;
  border: 1.5px solid var(--line-strong);
  background: var(--bg-surface);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
}
.nav-back-btn:hover {
  background: var(--blue-fill);
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-1px);
}

.reset-overview-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 11px;
  font-size: calc(11.5px * var(--font-scale, 1));
  font-weight: 700;
  border-radius: 6px;
  border: 1.5px solid var(--line-strong);
  background: var(--blue-fill);
  color: var(--line-strong);
  cursor: pointer;
  transition: all 0.15s ease;
}
.reset-overview-btn:hover {
  opacity: 0.92;
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.nav-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  color: var(--ink-muted);
  line-height: 1.4;
}

.nav-crumb-item {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  color: var(--ink-2);
  cursor: pointer;
  text-decoration: none;
  font-size: inherit;
  transition: all 0.12s ease;
}
.nav-crumb-item:hover {
  background: var(--blue-fill);
  color: var(--blue);
  border-color: var(--blue);
}
.nav-crumb-item.is-current {
  background: var(--blue-fill);
  color: var(--blue);
  font-weight: 700;
  cursor: default;
  border-color: var(--blue);
}
.nav-crumb-sep {
  color: var(--ink-muted);
  user-select: none;
  font-size: 10px;
}

/* ── Inspector Panel (Right) ────────────────────────────── */
.panel {
  border-left: 1.5px solid var(--line);
  background: var(--bg-elev);
  overflow-y: auto;
  padding: 16px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel-eyebrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 700;
  background: var(--blue-fill);
  color: var(--line-strong);
  border: 1px solid var(--line);
}
.badge.domain-ERP { background: var(--blue-fill); color: var(--blue); }
.badge.domain-MRP { background: var(--emerald-fill); color: var(--emerald); }
.badge.domain-FIN { background: var(--amber-fill); color: var(--amber); }
.badge.domain-SYS { background: var(--purple-fill); color: var(--purple); }

.panel-title {
  margin: 2px 0 0;
  font-size: calc(19px * var(--font-scale, 1));
  font-weight: 800;
  color: var(--ink);
  line-height: 1.25;
}
.panel-sub {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: calc(12px * var(--font-scale, 1));
  color: var(--ink-muted);
}

.panel-desc {
  margin: 0;
  font-size: calc(13.5px * var(--font-scale, 1));
  color: var(--ink-2);
  line-height: 1.6;
}

.panel-section {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.panel-section h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: calc(11.5px * var(--font-scale, 1));
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.kv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: calc(12.5px * var(--font-scale, 1));
}
.kv-table th,
.kv-table td {
  padding: 5px 8px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.kv-table th {
  width: 34%;
  background: var(--bg-subtle);
  color: var(--ink-2);
  font-weight: 600;
}
.kv-table td {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 600;
}

.rule-callout {
  padding: 9px 11px;
  border-left: 3.5px solid var(--teal);
  background: var(--bg-subtle);
  border-radius: 0 6px 6px 0;
  font-size: calc(12.5px * var(--font-scale, 1));
  color: var(--ink);
}

.func-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 5px;
}
.func-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 7px;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: calc(12px * var(--font-scale, 1));
}
.func-item.has-children {
  grid-column: 1 / -1;
  flex-direction: column;
  gap: 4px;
}
.func-children {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding-top: 2px;
}
.func-child {
  font-size: calc(11px * var(--font-scale, 1));
  padding: 1px 6px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.feat-list {
  margin: 0;
  padding-left: 18px;
  font-size: calc(12.5px * var(--font-scale, 1));
  color: var(--ink-2);
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.link-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg-subtle);
  color: var(--ink);
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 600;
  cursor: pointer;
}
.link-chip:hover {
  border-color: var(--line-strong);
  background: var(--blue-fill);
}

.flowchart-thumb {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-subtle);
  cursor: zoom-in;
}
.flowchart-thumb img {
  display: block;
  width: 100%;
  height: auto;
}
.flowchart-thumb figcaption {
  padding: 5px 8px;
  font-size: calc(11.5px * var(--font-scale, 1));
  color: var(--ink-muted);
  text-align: center;
  border-top: 1px solid var(--line);
}

/* ── Bottom Dock (Stepper + Playback) ───────────────────── */
.dock {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 16px;
  min-width: 0;
  max-width: 100vw;
  overflow: hidden;
  background: var(--bg-elev);
  border-top: 1.5px solid var(--line);
  z-index: 20;
}
.dock.is-hidden {
  display: none;
}

.controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.icon-btn.play {
  background: var(--line-strong);
  border-color: var(--line-strong);
  color: #ffffff;
}
html[data-theme="dark"] .icon-btn.play {
  color: #081024;
}
.icon-btn.play .i-pause { display: none; }
.icon-btn.play.is-playing .i-play { display: none; }
.icon-btn.play.is-playing .i-pause { display: block; fill: currentColor; stroke: none; }
.icon-btn.play .i-play { fill: currentColor; stroke: none; }

.speed-btn {
  height: 34px;
  padding: 0 9px;
  border: 1.5px solid var(--line);
  border-radius: 6px;
  background: var(--bg-elev);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 700;
  cursor: pointer;
}

.counter {
  font-family: var(--font-mono);
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 700;
  color: var(--ink-muted);
  min-width: 54px;
  text-align: center;
}

.stepper {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 0;
  padding: 2px 0;
  list-style: none;
  overflow-x: auto;
  min-width: 0;
  flex: 1 1 0%;
}

.step-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-subtle);
  color: var(--ink-2);
  font-size: calc(12px * var(--font-scale, 1));
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.step-pill:hover {
  border-color: var(--line-strong);
}
.step-pill.is-done {
  border-color: var(--line-strong);
  color: var(--ink);
}
.step-pill.is-current {
  background: var(--line-strong);
  border-color: var(--line-strong);
  color: #ffffff;
}
html[data-theme="dark"] .step-pill.is-current {
  color: #081024;
}
.step-pill code {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--font-scale, 1));
  font-weight: 800;
  opacity: 0.85;
}

/* Lightbox */
.lightbox {
  border: 2px solid var(--line-strong);
  border-radius: 8px;
  padding: 12px;
  background: var(--bg-elev);
  max-width: 92vw;
  max-height: 90vh;
}
.lightbox::backdrop {
  background: rgba(8, 16, 36, 0.72);
}
.lightbox form {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}
.lightbox img {
  max-width: 86vw;
  max-height: 80vh;
  display: block;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 960px) {
  body {
    height: auto;
    min-height: 100dvh;
    overflow-y: auto;
  }
  .topbar {
    flex-wrap: wrap;
    padding: 8px 12px;
  }
  .flow-tabs {
    order: 3;
    width: 100%;
  }
  .workspace {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 52vh auto;
  }
  .panel {
    border-left: none;
    border-top: 1.5px solid var(--line);
  }
  .packet-card {
    width: min(270px, calc(100% - 20px));
    left: 10px;
    top: 10px;
  }
  .dock {
    flex-wrap: wrap;
    position: sticky;
    bottom: 0;
  }
}