:root {
  --bg: #e8edf3;
  --bg-elevated: #f7f9fc;
  --surface: #ffffff;
  --border: #c5ced9;
  --border-soft: #dfe6ee;
  --text: #0f172a;
  --text-secondary: #475569;
  --muted: #64748b;
  --accent: #1d4ed8;
  --accent-soft: rgba(29, 78, 216, 0.12);
  --running: #047857;
  --idle: #b45309;
  --fault: #b91c1c;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
  --radius: 10px;
  --radius-sm: 6px;
  --font: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --transition: 0.18s ease;
}

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

html {
  height: auto;
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  height: auto;
  overflow-x: hidden;
  overflow-y: auto;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(29, 78, 216, 0.08), transparent 55%),
    linear-gradient(180deg, #eef2f7 0%, var(--bg) 45%);
}

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  height: auto;
  max-width: 1920px;
  margin: 0 auto;
}

/* Header */
.app-header {
  flex-shrink: 0;
  padding: 1rem 1.25rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.header-updated {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  white-space: nowrap;
}

.header-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, #1e40af 0%, #1d4ed8 50%, #2563eb 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    var(--shadow-md);
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-radius: 4px;
  opacity: 0.9;
}

.brand-kicker {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

.brand-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
}

/* Segmented control */
.segmented {
  display: inline-flex;
  padding: 3px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  gap: 0;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-opt {
  padding: 0.45rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  user-select: none;
}

.segmented input:checked + .segmented-opt {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.segmented input:not(:checked) + .segmented-opt:hover {
  color: var(--text);
}

/* KPI row */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.65rem;
}

@media (max-width: 1200px) {
  .kpi-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .kpi-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.kpi-card {
  position: relative;
  padding: 0.65rem 0.75rem 0.6rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.kpi-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.kpi-card--accent::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: var(--radius) 0 0 var(--radius);
}

.kpi-card--run::before {
  background: linear-gradient(180deg, #10b981, #047857);
}

.kpi-card--idle::before {
  background: linear-gradient(180deg, #fbbf24, #b45309);
}

.kpi-card--fault::before {
  background: linear-gradient(180deg, #f87171, #b91c1c);
}

.kpi-card--wide {
  grid-column: span 1;
}

.kpi-card-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.kpi-card-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
}

.kpi-running {
  color: var(--running);
}

.kpi-idle {
  color: var(--idle);
}

.kpi-fault {
  color: var(--fault);
}

.kpi-card-hint {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.68rem;
  color: var(--muted);
}

/* Analytics charts (below 3D twin row) */
.charts-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr) minmax(0, 1fr);
  gap: 0.65rem;
  flex-shrink: 0;
  padding: 0.85rem 1.25rem 1rem;
  border-top: 1px solid var(--border-soft);
  background: var(--surface);
  box-shadow: 0 -2px 8px rgba(15, 23, 42, 0.04);
}

@media (max-width: 1100px) {
  .charts-strip {
    grid-template-columns: 1fr 1fr;
  }

  .chart-card:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .charts-strip {
    grid-template-columns: 1fr;
  }

  .chart-card:first-child {
    grid-column: auto;
  }
}

.chart-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 0.65rem 0.75rem 0.5rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chart-card-head {
  margin-bottom: 0.35rem;
}

.chart-card-title {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.chart-card-sub {
  margin: 0.15rem 0 0;
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.3;
}

.chart-wrap {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 0;
}

.chart-wrap--wide {
  height: 168px;
}

.chart-wrap--donut {
  height: 200px;
}

.chart-wrap--bars {
  height: 168px;
}

.chart-wrap canvas {
  max-height: 100%;
}

/* Main layout — tall 3D row; page scrolls to charts below */
.main-row {
  display: flex;
  flex: 0 0 auto;
  align-items: stretch;
  padding: 0.85rem 1.25rem 0.65rem;
  gap: 0.85rem;
}

.viewer-panel {
  flex: 1;
  min-width: 0;
}

.viewer-chrome {
  display: flex;
  flex-direction: column;
  min-height: min(72vh, 880px);
  height: auto;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.viewer-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: linear-gradient(180deg, #fafbfc 0%, var(--surface) 100%);
  border-bottom: 1px solid var(--border-soft);
}

.viewer-title-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.viewer-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.4rem;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #fff;
  background: linear-gradient(135deg, #334155, #1e293b);
  border-radius: var(--radius-sm);
}

.viewer-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.viewer-sub {
  margin: 0.15rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.viewer-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.btn-ghost {
  padding: 0.45rem 0.85rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border-color: var(--border-soft);
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}

.viewer-canvas-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: min(64vh, 800px);
  background: linear-gradient(165deg, #dbe4ee 0%, #c8d4e2 45%, #b8c5d6 100%);
}

#canvas-container {
  position: absolute;
  inset: 0;
}

.viewer-legend {
  position: absolute;
  left: 0.85rem;
  bottom: 0.85rem;
  z-index: 2;
  padding: 0.65rem 0.85rem;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  font-size: 0.78rem;
  color: var(--text-secondary);
  pointer-events: none;
}

.legend-title {
  display: block;
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  margin-bottom: 0.4rem;
}

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

.legend-list li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.25rem;
}

.legend-list li:first-child {
  margin-top: 0;
}

.swatch {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.swatch-running {
  background: linear-gradient(180deg, #4ade80, #16a34a);
}

.swatch-idle {
  background: linear-gradient(180deg, #fde047, #ca8a04);
}

.swatch-fault {
  background: linear-gradient(180deg, #f87171, #dc2626);
}

.viewer-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  padding: 0.65rem 1rem;
  max-width: 22rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  z-index: 3;
}

.viewer-hint.hidden {
  display: none;
}

/* Detail panel */
.detail-panel {
  position: relative;
  width: 300px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: width var(--transition);
}

.detail-panel.collapsed {
  width: 44px;
}

.detail-panel.collapsed .panel-inner {
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
}

.panel-collapse {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 52px;
  border: none;
  border-right: 1px solid var(--border-soft);
  border-radius: var(--radius) 0 0 var(--radius);
  background: var(--bg-elevated);
  cursor: pointer;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: background var(--transition), color var(--transition);
}

.panel-collapse:hover {
  color: var(--text);
  background: var(--surface);
}

.detail-panel:not(.collapsed) .chevron {
  transform: rotate(180deg);
}

.chevron {
  display: inline-block;
  font-size: 1.2rem;
  line-height: 1;
  transition: transform var(--transition);
}

.panel-inner {
  padding: 1.1rem 1rem 1.1rem 2.35rem;
  flex: 1;
  overflow: auto;
  transition: opacity var(--transition);
}

/* Collapsible machine mapping (closed by default) */
.mapping-details {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 0.5rem;
}

.mapping-summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.15rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.mapping-summary::-webkit-details-marker {
  display: none;
}

.mapping-summary:hover {
  background: var(--bg-elevated);
}

.mapping-summary-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  flex: 1;
  min-width: 0;
}

.mapping-summary-hint {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
}

.mapping-summary-chevron {
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  flex-shrink: 0;
  margin-top: -0.15rem;
  transition: transform var(--transition);
}

.mapping-details[open] .mapping-summary-chevron {
  transform: rotate(225deg);
  margin-top: 0.1rem;
}

.mapping-details-body {
  padding-top: 0.65rem;
}

.mapping-details--incomplete .mapping-summary-hint {
  color: #b45309;
  font-weight: 600;
}

.panel-h3 {
  margin: 0 0 0.5rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.panel-help {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--muted);
}

.panel-help--pick {
  margin: 0.5rem 0 0;
  font-weight: 600;
  color: var(--accent);
}

.mapping-rows {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.mapping-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.mapping-row-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.mapping-row-controls {
  display: flex;
  gap: 0.4rem;
  align-items: stretch;
}

.mapping-select {
  flex: 1;
  min-width: 0;
  font-family: inherit;
  font-size: 0.78rem;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
}

.btn-pick {
  flex-shrink: 0;
  padding: 0.4rem 0.55rem;
  font-size: 0.75rem;
}

.mapping-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.btn-primary {
  padding: 0.45rem 0.9rem;
  color: #fff;
  background: linear-gradient(180deg, #2563eb, #1d4ed8);
  border: 1px solid #1e40af;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #3b82f6, #2563eb);
}

.panel-head {
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-soft);
}

.panel-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.panel-sub {
  margin: 0.35rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.panel-empty {
  margin: 0;
  padding: 1rem 0.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-soft);
}

.detail-list {
  margin: 0;
}

.detail-list.hidden {
  display: none;
}

.detail-block {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-soft);
}

.detail-block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.detail-block:first-of-type {
  padding-top: 0;
}

.detail-list dt {
  margin: 0 0 0.25rem;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.detail-list dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text);
}

.status-pill {
  display: inline-block;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font);
  text-transform: capitalize;
}

.status-pill.running {
  background: #d1fae5;
  color: var(--running);
}

.status-pill.idle {
  background: #fef3c7;
  color: var(--idle);
}

.status-pill.fault {
  background: #fee2e2;
  color: var(--fault);
}

@media (max-width: 900px) {
  .main-row {
    flex-direction: column;
    padding: 0.65rem 0.85rem 1rem;
  }

  .viewer-chrome {
    min-height: min(58vh, 640px);
  }

  .detail-panel {
    width: 100%;
    max-height: 42vh;
  }

  .detail-panel.collapsed {
    width: 100%;
    max-height: 44px;
  }

  .viewer-canvas-wrap {
    min-height: min(50vh, 520px);
  }
}