/* Linear-inspired design tokens — awesome-design-md/design-md/linear.app */
:root {
  color-scheme: dark;

  --primary: #5e6ad2;
  --primary-hover: #828fff;
  --primary-focus: #5e69d1;
  --on-primary: #ffffff;

  --ink: #f7f8f8;
  --ink-muted: #d0d6e0;
  --ink-subtle: #8a8f98;
  --ink-tertiary: #62666d;

  --canvas: #010102;
  --surface-1: #0f1011;
  --surface-2: #141516;
  --surface-3: #18191a;

  --hairline: #23252a;
  --hairline-strong: #34343a;

  --success: #27a644;
  --warn: #c58b2d;
  --danger: #e5484d;

  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  letter-spacing: -0.02em;
  line-height: 1.5;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -40px;
  z-index: 50;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: var(--on-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 12px;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus-visible {
  top: 12px;
  outline: 2px solid color-mix(in srgb, var(--primary-focus) 50%, transparent);
  outline-offset: 2px;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.error-banner {
  max-width: 1320px;
  margin: 12px auto 0;
  width: calc(100% - 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid color-mix(in srgb, var(--danger) 50%, var(--hairline));
  background: color-mix(in srgb, var(--danger) 14%, var(--surface-1));
  border-radius: var(--radius-lg);
  padding: 10px 14px;
}

.error-banner[hidden] {
  display: none !important;
}

.error-banner p {
  margin: 0;
  color: #f2a6aa;
  font-size: 13px;
}

/* ── Hero ─────────────────────────────────────────────── */

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 40px 24px 28px;
  border-bottom: 1px solid var(--hairline);
}

.hero-copy {
  display: grid;
  gap: 8px;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.lede {
  margin: 0;
  max-width: 52ch;
  color: var(--ink-subtle);
  font-size: 15px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* ── Data provenance ──────────────────────────────────── */

.source-legend {
  width: min(1272px, calc(100% - 48px));
  margin: 12px auto 0;
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--surface-1);
}

.source-legend h2 {
  margin: 0 0 10px;
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 600;
}

.source-legend-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px 16px;
  margin: 0;
}

.source-legend-list > div {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-width: 0;
}

.source-legend-list dt,
.source-legend-list dd {
  margin: 0;
}

.source-legend-list dd {
  color: var(--ink-subtle);
  font-size: 12px;
  line-height: 1.35;
}

.source-legend-list strong {
  color: var(--ink-muted);
  font-weight: 600;
}

.source-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 20px;
  margin-top: 7px;
  padding: 1px 7px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--ink-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  text-transform: uppercase;
  white-space: nowrap;
}

.source-legend .source-pill {
  margin-top: 0;
}

.source-pill--input {
  border-style: dotted;
  color: var(--ink-muted);
}

.source-pill--analytics {
  border-color: color-mix(in srgb, var(--primary) 70%, var(--hairline));
  border-style: double;
  border-width: 3px;
  color: var(--primary-hover);
}

.source-pill--des {
  border-color: color-mix(in srgb, var(--success) 70%, var(--hairline));
  border-style: solid;
  color: #72d48a;
}

.source-pill--derived {
  border-color: color-mix(in srgb, var(--warn) 75%, var(--hairline));
  border-style: dashed;
  color: #e4ad58;
}

.source-pill--mixed {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--warn));
  border-style: solid;
  border-width: 2px;
  color: color-mix(in srgb, var(--primary-hover) 60%, #e4ad58);
}

/* ── Status badge ─────────────────────────────────────── */

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.status-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-tertiary);
}

.status--idle::before {
  background: var(--ink-tertiary);
}

.status--loading::before {
  background: var(--primary);
  animation: pulse 1.2s ease-in-out infinite;
}

.status--ready::before {
  background: var(--success);
}

.status--error::before {
  background: var(--danger);
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

/* ── Buttons ──────────────────────────────────────────── */

.btn {
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  min-height: 36px;
  padding: 0 14px;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-primary:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary-focus) 50%, transparent);
  outline-offset: 2px;
}

.btn-secondary {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  color: var(--ink);
}

.btn-secondary:hover {
  border-color: var(--hairline-strong);
  background: var(--surface-3);
}

.btn-secondary:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary-focus) 50%, transparent);
  outline-offset: 2px;
}

/* ── Автовыводы ───────────────────────────────────────── */

.copilot-verdict {
  margin: 0;
  padding: 16px 20px;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink-muted);
  font-size: 15px;
  line-height: 1.5;
}

.insight-list {
  display: grid;
  gap: 10px;
  padding: 16px 20px 20px;
}

.insight-card {
  display: grid;
  gap: 6px;
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.insight-card strong {
  font-size: 13px;
}

.insight-card p {
  margin: 0;
  color: var(--ink-subtle);
  font-size: 12px;
  line-height: 1.45;
}

.insight--critical {
  border-left: 3px solid var(--danger);
}

.insight--warning {
  border-left: 3px solid var(--warn);
}

.insight--success {
  border-left: 3px solid var(--success);
}

.insight--info {
  border-left: 3px solid var(--primary);
}

/* ── Sorting reserve ──────────────────────────────────── */

.reserve-content {
  display: grid;
  gap: 10px;
  padding: 14px 20px 18px;
}

.reserve-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 4px 10px;
}

.reserve-badge--idle {
  background: var(--surface-2);
  border-color: var(--hairline);
  color: var(--ink-muted);
}

.reserve-badge--ok {
  background: color-mix(in srgb, var(--success) 14%, var(--surface-1));
  border-color: color-mix(in srgb, var(--success) 45%, var(--hairline));
  color: #95dfab;
}

.reserve-badge--warn {
  background: color-mix(in srgb, var(--warn) 14%, var(--surface-1));
  border-color: color-mix(in srgb, var(--warn) 45%, var(--hairline));
  color: #e6c389;
}

.reserve-badge--danger {
  background: color-mix(in srgb, var(--danger) 14%, var(--surface-1));
  border-color: color-mix(in srgb, var(--danger) 45%, var(--hairline));
  color: #f2a6aa;
}

.reserve-text {
  margin: 0;
  color: var(--ink-muted);
  font-size: 13px;
  line-height: 1.5;
}

/* ── Floor plan (scale top-down) ──────────────────────── */

.floor-plan-root {
  padding: 12px 20px 8px;
}

.floor-plan-svg {
  width: 100%;
  height: auto;
  display: block;
}

.floor-shell {
  fill: none;
  stroke: var(--hairline);
  stroke-width: 1.5;
  rx: 8;
}

.floor-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  fill: var(--ink);
}

.floor-label--muted {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  fill: var(--ink-muted);
}

.floor-flow {
  stroke: color-mix(in srgb, var(--primary) 60%, transparent);
  stroke-width: 2;
  stroke-dasharray: 6 5;
}

.floor-aisle {
  fill: color-mix(in srgb, var(--ink-muted) 14%, transparent);
  stroke: color-mix(in srgb, var(--ink-muted) 42%, transparent);
  stroke-width: 0.8;
  stroke-dasharray: 5 4;
}

.floor-support {
  fill: color-mix(in srgb, var(--primary) 10%, var(--surface-1));
  stroke: color-mix(in srgb, var(--primary) 58%, var(--hairline));
  stroke-width: 1.2;
}

.floor-dimension {
  stroke: var(--ink-muted);
  stroke-width: 1;
  marker-start: url(#dimensionArrow);
  marker-end: url(#dimensionArrow);
}

.floor-dimension-arrow {
  fill: var(--ink-muted);
}

.floor-label--aisle,
.floor-label--support,
.floor-label--dimension {
  fill: var(--ink-muted);
  font-size: 9px;
}

.floor-label--equipment {
  font-size: 9px;
  font-weight: 700;
  paint-order: stroke;
  stroke: #11171a;
  stroke-width: 2px;
  stroke-linejoin: round;
}

.floor-flight-sorter {
  fill: #11171a;
  fill-opacity: 0.82;
  stroke: #4ade80;
  stroke-width: 1.2;
}

.floor-flight-sorter__lane {
  stroke: color-mix(in srgb, #4ade80 58%, transparent);
  stroke-width: 0.6;
}

.floor-dock-gate {
  stroke: color-mix(in srgb, var(--ink) 35%, transparent);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.floor-sorter-unit__outline {
  fill-opacity: 0.18;
  stroke-width: 1.25;
}

.floor-sorter-unit__core {
  fill: #11171a;
  stroke: color-mix(in srgb, var(--ink) 42%, transparent);
  stroke-width: 0.8;
}

.floor-sorter-unit__chute {
  fill: color-mix(in srgb, var(--ink-muted) 26%, #11171a);
  stroke: color-mix(in srgb, var(--ink) 24%, transparent);
  stroke-width: 0.55;
}

.floor-sorter-unit__label {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 600;
  fill: var(--ink);
  paint-order: stroke;
  stroke: color-mix(in srgb, var(--surface-1) 88%, transparent);
  stroke-width: 2.5px;
}

.output-kty-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--hairline);
}

.output-kty-grid > div {
  min-width: 0;
  padding: 18px 20px;
  border-right: 1px solid var(--hairline);
}

.output-kty-grid > div:last-child {
  border-right: 0;
}

.output-kty-grid span,
.output-kty-grid strong {
  display: block;
}

.output-kty-grid span {
  margin-bottom: 8px;
  color: var(--ink-muted);
  font-size: 12px;
}

.output-kty-grid strong {
  font-size: 18px;
  font-weight: 650;
}

.equipment-note {
  margin: 0;
  padding: 12px 20px 14px;
  border-top: 1px solid var(--hairline);
  color: var(--ink-subtle);
  font-size: 12px;
  line-height: 1.45;
}

.floor-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: 8px 20px 16px;
  font-size: 11px;
  color: var(--ink-muted);
}

.floor-legend .swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: -1px;
}

.swatch--ok {
  background: #27a644;
}

.swatch--warn {
  background: #c58b2d;
}

.swatch--danger {
  background: #e5484d;
}

.floor-legend-note {
  margin-left: auto;
  color: var(--ink-subtle);
}

/* ── What-if / directions / failure ───────────────────── */

.whatif-toolbar {
  display: grid;
  gap: 10px;
  padding: 14px 20px 16px;
}

.whatif-verdict {
  margin: 0;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.45;
}

.whatif-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.whatif-controls .field--bare {
  gap: 0;
}

.whatif-controls .field-compact {
  min-width: 220px;
  flex: 1 1 220px;
  max-width: 360px;
}

.whatif-controls .btn {
  flex: 0 0 auto;
}

.montecarlo-toolbar {
  display: grid;
  gap: 10px;
  padding: 14px 20px 0;
}

.montecarlo-verdict {
  margin: 0;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.45;
}

.montecarlo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
}

.montecarlo-controls .field {
  gap: 6px;
}

.montecarlo-controls .field-compact {
  min-width: 132px;
  flex: 0 1 148px;
}

.montecarlo-controls .field input,
.montecarlo-controls .field select {
  height: 36px;
  min-height: 36px;
  max-height: 36px;
  box-sizing: border-box;
  padding: 0 10px;
  line-height: 1.2;
}

.montecarlo-controls .field select {
  padding-right: 28px;
}

.montecarlo-controls .btn {
  flex: 0 0 auto;
  height: 36px;
  min-height: 36px;
  padding: 0 14px;
}

.field-compact--narrow {
  min-width: 88px;
  flex: 0 1 96px;
}

.montecarlo-table {
  margin-top: 0;
}

.panel-montecarlo .table-wrap {
  padding-bottom: 18px;
}

.row--muted td {
  color: var(--ink-subtle);
  font-style: italic;
}

.directions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 0 20px 12px;
}

.row--ok td:last-child {
  color: #27a644;
  font-weight: 600;
}

.row--danger td:last-child {
  color: #e5484d;
  font-weight: 600;
}

@media (max-width: 900px) {
  .directions-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Shell & panels ───────────────────────────────────── */

.shell {
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 16px;
  flex: 1;
}

.dashboard-tabs {
  position: sticky;
  top: 8px;
  z-index: 30;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 4px;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: rgb(15 16 18 / 94%);
  box-shadow: 0 10px 30px rgb(0 0 0 / 28%);
  backdrop-filter: blur(14px);
}

.dashboard-tab {
  min-width: 0;
  height: 44px;
  padding: 0 14px;
  border: 0;
  border-right: 1px solid var(--hairline);
  border-radius: 4px;
  background: transparent;
  color: var(--ink-subtle);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.dashboard-tab:last-child {
  border-right: 0;
}

.dashboard-tab:hover {
  color: var(--ink);
  background: rgb(255 255 255 / 4%);
}

.dashboard-tab.is-active {
  color: var(--ink);
  background: var(--surface-2);
  box-shadow: inset 0 -2px 0 var(--primary);
}

.dashboard-tab:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.dashboard-tab-hidden {
  display: none !important;
}

.panel {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 3%);
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--hairline);
}

.panel-heading > div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0 8px;
  min-width: 0;
}

.panel-heading > div > h2 {
  grid-column: 1;
  grid-row: 1;
}

.panel-heading > div > .source-pill {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
}

.panel-heading > div > .panel-sub {
  grid-column: 1 / -1;
  grid-row: 2;
}

.panel-heading h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.panel-sub {
  margin: 4px 0 0;
  color: var(--ink-subtle);
  font-size: 12px;
}

/* ── KPI row ──────────────────────────────────────────── */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.kpi-card {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 3%);
}

.kpi-card > .source-pill--compact {
  position: absolute;
  top: 13px;
  right: 16px;
  margin: 0;
}

.kpi-card:has(> .source-pill--compact) > .kpi-label {
  padding-right: 84px;
}

.kpi-card-accent {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--hairline));
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--primary) 8%, var(--surface-1)),
    var(--surface-1)
  );
}

.kpi-card-primary .kpi-value {
  font-size: clamp(25px, 3.4vw, 34px);
}

.kpi-label {
  color: var(--ink-subtle);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.kpi-hint {
  color: var(--ink-subtle);
  font-size: 11px;
  line-height: 1.3;
}

.kpi-value {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--ink);
}

/* ── Params form ──────────────────────────────────────── */

.param-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 18px 20px 20px;
}

.param-grid > .field {
  min-width: 0;
}

.model-boundary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 14px 20px 16px;
  border-top: 1px solid var(--hairline);
  color: var(--ink-subtle);
  font-size: 12px;
  line-height: 1.45;
}

.model-boundary strong {
  color: var(--ink-muted);
  font-weight: 600;
}

.field {
  display: grid;
  gap: 6px;
  color: var(--ink-subtle);
  font-size: 12px;
  font-weight: 500;
}

.field input,
.field select {
  display: block;
  width: 100%;
  max-width: 100%;
  min-height: 36px;
  height: 36px;
  box-sizing: border-box;
  padding: 0 10px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  line-height: 1.2;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.field select {
  -webkit-appearance: none;
  appearance: none;
  padding-right: 32px;
  cursor: pointer;
  background-color: var(--surface-2);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M3 4.5 6 7.5 9 4.5' stroke='%238a8f98' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px 12px;
}

.field input:focus-visible,
.field select:focus-visible {
  outline: none;
  border-color: var(--hairline-strong);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary-focus) 40%, transparent);
}

.policy-fieldset {
  grid-column: 1 / -1;
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.advanced-params {
  grid-column: 1 / -1;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  padding: 10px 14px 14px;
}

.advanced-params summary {
  cursor: pointer;
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 600;
  list-style: none;
}

.advanced-params summary:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary-focus) 50%, transparent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

.advanced-params summary::before {
  content: "▸";
  margin-right: 8px;
  color: var(--ink-subtle);
}

.advanced-params[open] summary::before {
  content: "▾";
}

.advanced-grid {
  margin-top: 10px;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.policy-fieldset legend {
  padding: 0 4px;
  color: var(--ink-subtle);
  font-size: 12px;
  font-weight: 500;
}

.policy-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  background: var(--surface-1);
  color: var(--ink-muted);
  font-size: 13px;
  cursor: pointer;
  transition:
    background 0.15s ease,
    border-color 0.15s ease;
}

.chip:has(input:checked) {
  border-color: color-mix(in srgb, var(--primary) 50%, var(--hairline));
  background: color-mix(in srgb, var(--primary) 12%, var(--surface-1));
  color: var(--ink);
}

.chip input {
  accent-color: var(--primary);
}

/* ── Visualizations ────────────────────────────────────── */

.viz-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 20px 0;
}

.field-compact {
  min-width: 120px;
  flex: 0 1 auto;
}

.scene-toolbar {
  display: grid;
  gap: 10px;
  padding: 14px 20px 0;
}

.scene-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
}

.scene-controls .field input,
.scene-controls .field select {
  height: 36px;
  min-height: 36px;
  max-height: 36px;
}

.scene-controls .btn {
  flex: 0 0 auto;
  height: 36px;
  min-height: 36px;
  padding: 0 14px;
}

.field-timeline {
  flex: 1 1 200px;
  min-width: 180px;
}

.field-timeline--full {
  flex: none;
  width: 100%;
  min-width: 0;
}

.field-timeline input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  margin-top: 4px;
}

.field-timeline input[type="range"]:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary-focus) 50%, transparent);
  outline-offset: 2px;
}

.scene-root {
  height: 540px;
  margin: 14px 20px 20px;
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--canvas);
}

.scene-root--unavailable {
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--ink-muted);
  text-align: center;
}

.scene-root canvas {
  display: block;
}

.concept-model-heading {
  align-items: flex-end;
}

.panel-heading > .concept-model-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

.concept-model-actions .btn {
  padding-right: 13px;
  padding-left: 13px;
}

.concept-model-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--hairline);
}

.concept-model-facts > div {
  display: grid;
  gap: 2px;
  min-width: 0;
  padding: 14px 20px;
  border-right: 1px solid var(--hairline);
}

.concept-model-facts > div:nth-child(3n) {
  border-right: 0;
}

.concept-model-facts > div:nth-child(-n + 3) {
  border-bottom: 1px solid var(--hairline);
}

.concept-model-facts strong {
  color: var(--ink);
  font-size: 20px;
  font-weight: 650;
}

.concept-model-facts span {
  color: var(--ink-subtle);
  font-size: 12px;
}

.concept-model-root {
  height: 620px;
  position: relative;
  overflow: hidden;
  background-color: #07090c;
  background-image: linear-gradient(rgb(7 9 12 / 25%), rgb(7 9 12 / 25%)),
    url("/static/models/robozon-sorting-center.webp");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.concept-model-root canvas {
  display: block;
  opacity: 0;
  transition: opacity 180ms ease;
}

.concept-model-root--ready canvas {
  opacity: 1;
}

.concept-model-root--fallback canvas {
  display: none;
}

.concept-zone-legend {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.concept-zone-legend__item {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  min-width: 0;
  padding: 8px 12px;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  color: var(--ink-muted);
  font-size: 11px;
}

.concept-zone-legend__item:nth-child(4n) {
  border-right: 0;
}

.concept-zone-legend__item strong {
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-weight: 550;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.concept-zone-legend__item small {
  color: var(--ink-subtle);
  font-size: 10px;
  white-space: nowrap;
}

.concept-zone-legend__swatch {
  width: 9px;
  height: 9px;
  background: #825ec7;
  border-radius: 2px;
}

.concept-zone-legend__item[data-kind="inbound"] .concept-zone-legend__swatch {
  background: #1670a6;
}

.concept-zone-legend__item[data-kind="exception"] .concept-zone-legend__swatch {
  background: #c9414b;
}

.concept-zone-legend__item[data-kind="sortation"] .concept-zone-legend__swatch {
  background: #7257c7;
}

.concept-zone-legend__item[data-kind="support"] .concept-zone-legend__swatch {
  background: #c58b2d;
}

.concept-zone-legend__item[data-kind="outbound"] .concept-zone-legend__swatch {
  background: #27915a;
}

.concept-zone-legend__item[data-kind="service"] .concept-zone-legend__swatch {
  background: #68727d;
}

.concept-model-footer {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.7fr);
  gap: 20px;
  padding: 12px 20px 14px;
  border-top: 1px solid var(--hairline);
  color: var(--ink-subtle);
  font-size: 12px;
}

.concept-model-footer p {
  margin: 0;
}

.concept-model-status[data-state="ready"] {
  color: var(--success);
}

.concept-model-status[data-state="error"] {
  color: var(--warn);
}

.scene-label-layer {
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.scene-zone-label {
  background: color-mix(in srgb, var(--surface-2) 92%, transparent);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.2;
  max-width: 122px;
  min-width: 84px;
  padding: 4px 7px;
  text-align: center;
  transform: translate(-50%, -100%);
  white-space: normal;
  backdrop-filter: blur(8px);
}

.scene-zone-title {
  display: block;
  overflow-wrap: anywhere;
}

.scene-zone-value {
  color: var(--ink-subtle);
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  margin-top: 2px;
}

.scene-sorter-index {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
  text-shadow: 0 1px 3px var(--canvas);
  transform: translate(-50%, -100%);
}

.scene-zone-label--sorting {
  min-width: 132px;
}

.chart-frame {
  padding: 8px 12px 16px;
}

#metricsChart {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

/* ── Tables ───────────────────────────────────────────── */

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 11px 20px;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--hairline);
}

.data-table th {
  color: var(--ink-subtle);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.data-table tbody tr:hover td {
  background: var(--surface-2);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ── Zones & bottlenecks ──────────────────────────────── */

.split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.zone-list,
.bottleneck-list {
  display: grid;
  gap: 8px;
  padding: 14px 20px 20px;
}

.zone {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 6px 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.zone-details {
  display: grid;
  gap: 2px;
}

.zone-details strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.zone-details span {
  color: var(--ink-subtle);
  font-size: 12px;
}

.zone-util {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  font-style: normal;
  color: var(--ink-muted);
}

.util-bar {
  grid-column: 1 / -1;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--surface-3);
  overflow: hidden;
}

.util-bar-fill {
  height: 100%;
  border-radius: inherit;
  transition: width 0.3s ease;
}

.util-bar-fill--ok {
  background: var(--success);
}

.util-bar-fill--warn {
  background: var(--warn);
}

.util-bar-fill--danger {
  background: var(--danger);
}

.bottleneck-list h3 {
  margin: 12px 0 4px;
  color: var(--ink-subtle);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.bottleneck-list h3:first-child {
  margin-top: 0;
}

.bottleneck {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--danger);
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.bottleneck strong {
  font-size: 13px;
  color: var(--ink);
}

.bottleneck span {
  color: var(--ink-subtle);
  font-size: 12px;
}

/* ── Evidence and main experiment ────────────────────── */

.panel-balance {
  border-color: color-mix(in srgb, var(--success) 42%, var(--hairline));
}

.balance-status {
  flex: 0 0 auto;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-pill);
  padding: 5px 10px;
  color: var(--ink-subtle);
  font-size: 12px;
  font-weight: 600;
}

.balance-status--ok {
  border-color: color-mix(in srgb, var(--success) 60%, var(--hairline));
  color: #65d17a;
}

.balance-status--warn {
  border-color: color-mix(in srgb, var(--danger) 60%, var(--hairline));
  color: #f28b90;
}

.balance-equation {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: stretch;
  gap: 10px;
  padding: 20px 24px 12px;
}

.balance-term {
  min-width: 0;
  display: grid;
  align-content: center;
  gap: 6px;
  border-left: 2px solid var(--primary);
  padding: 10px 12px;
  background: var(--surface-2);
}

.balance-term span {
  color: var(--ink-subtle);
  font-size: 12px;
}

.balance-term strong {
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
  font-size: 22px;
}

.balance-operator {
  align-self: center;
  color: var(--ink-muted);
  font-size: 24px;
  font-weight: 600;
}

.balance-note,
.experiment-verdict {
  margin: 0;
  padding: 4px 24px 20px;
  color: var(--ink-subtle);
  font-size: 13px;
}

.panel-kicker {
  margin: 0 0 3px;
  color: #65d17a;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.panel-experiment {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--hairline));
}

.experiment-comparison {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 88px minmax(0, 1fr);
  align-items: stretch;
  gap: 14px;
  padding: 4px 24px 18px;
}

.experiment-comparison[hidden] {
  display: none;
}

.experiment-option {
  min-width: 0;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 16px;
  background: var(--surface-2);
}

.experiment-option--central {
  border-color: color-mix(in srgb, var(--success) 55%, var(--hairline));
}

.experiment-option-label {
  color: var(--ink-subtle);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.experiment-option h3 {
  margin: 4px 0 14px;
  font-size: 17px;
}

.experiment-option dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

.experiment-option dl div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--hairline);
  padding-top: 8px;
}

.experiment-option dt {
  color: var(--ink-subtle);
  font-size: 12px;
}

.experiment-option dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  text-align: right;
}

.experiment-decision {
  align-self: center;
  display: grid;
  justify-items: center;
  gap: 2px;
  color: var(--ink-subtle);
  font-size: 10px;
  text-transform: uppercase;
}

.experiment-decision strong {
  color: var(--primary-hover);
  font-size: 30px;
}

/* ── Presentation mode ───────────────────────────────── */

.presentation-guide {
  position: fixed;
  z-index: 40;
  right: 20px;
  bottom: 20px;
  left: 20px;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto auto;
  align-items: center;
  gap: 20px;
  max-width: 1280px;
  margin: 0 auto;
  border: 1px solid color-mix(in srgb, var(--primary) 65%, var(--hairline));
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: color-mix(in srgb, var(--surface-1) 96%, transparent);
  box-shadow: 0 18px 50px rgb(0 0 0 / 55%);
  backdrop-filter: blur(12px);
}

.presentation-guide[hidden] {
  display: none;
}

.presentation-guide-copy {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.presentation-guide-copy strong {
  font-size: 16px;
}

.presentation-guide-copy p {
  max-width: 78ch;
  margin: 0;
  color: var(--ink-muted);
  font-size: 12px;
}

.presentation-step-label {
  color: var(--primary-hover);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
}

.presentation-progress,
.presentation-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.presentation-progress button {
  width: 28px;
  height: 28px;
  border: 1px solid var(--hairline-strong);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--ink-subtle);
  cursor: pointer;
  font: 600 11px var(--font-mono);
}

.presentation-progress button.is-current {
  border-color: var(--primary-hover);
  background: var(--primary);
  color: var(--on-primary);
}

.presentation-focus {
  outline: 2px solid var(--primary-hover);
  outline-offset: 5px;
}

.presentation-mode {
  padding-bottom: 132px;
}

/* ── Footer ───────────────────────────────────────────── */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 20px 24px 32px;
  border-top: 1px solid var(--hairline);
  color: var(--ink-subtle);
  font-size: 12px;
}

.mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-subtle);
}

/* ── Responsive ───────────────────────────────────────── */

@media (max-width: 1024px) {
  .source-legend-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .viz-grid,
  .split-grid {
    grid-template-columns: 1fr;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .output-kty-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-model-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-model-facts > div:nth-child(3n) {
    border-right: 1px solid var(--hairline);
  }

  .concept-model-facts > div:nth-child(2n) {
    border-right: 0;
  }

  .concept-model-facts > div:nth-child(-n + 4) {
    border-bottom: 1px solid var(--hairline);
  }

  .concept-zone-legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-zone-legend__item:nth-child(4n) {
    border-right: 1px solid var(--hairline);
  }

  .concept-zone-legend__item:nth-child(2n) {
    border-right: 0;
  }

  .balance-equation {
    grid-template-columns: 1fr auto 1fr;
  }

  .balance-equation .balance-operator:nth-of-type(2) {
    grid-column: 1 / -1;
    justify-self: center;
  }

  .experiment-comparison {
    grid-template-columns: 1fr;
  }

  .experiment-decision strong {
    transform: rotate(90deg);
  }

  .presentation-guide {
    grid-template-columns: 1fr auto;
  }

  .presentation-progress {
    display: none;
  }

  .param-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .advanced-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .model-boundary {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .policy-fieldset {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .source-legend {
    width: calc(100% - 24px);
    margin-top: 8px;
  }

  .source-legend-list {
    grid-template-columns: 1fr;
  }

  .error-banner {
    width: calc(100% - 24px);
    margin-top: 8px;
    flex-direction: column;
    align-items: flex-start;
  }
  .hero {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 28px;
  }

  .hero-actions {
    width: 100%;
    justify-content: space-between;
  }

  .kpi-grid,
  .param-grid,
  .advanced-grid,
  .output-kty-grid {
    grid-template-columns: 1fr;
  }

  .concept-model-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .concept-model-actions {
    width: 100%;
  }

  .concept-model-actions .btn {
    flex: 1 1 0;
  }

  .concept-model-facts {
    grid-template-columns: 1fr;
  }

  .concept-model-facts > div,
  .concept-model-facts > div:nth-child(2n),
  .concept-model-facts > div:nth-child(3n) {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }

  .concept-model-facts > div:last-child {
    border-bottom: 0;
  }

  .concept-model-root {
    height: 430px;
  }

  .concept-zone-legend {
    grid-template-columns: 1fr;
  }

  .concept-zone-legend__item,
  .concept-zone-legend__item:nth-child(2n),
  .concept-zone-legend__item:nth-child(4n) {
    border-right: 0;
  }

  .concept-model-footer {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .output-kty-grid > div {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }

  .balance-equation {
    grid-template-columns: 1fr;
  }

  .balance-operator {
    justify-self: center;
  }

  .balance-equation .balance-operator:nth-of-type(2) {
    grid-column: auto;
  }

  .presentation-guide {
    right: 8px;
    bottom: 8px;
    left: 8px;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .presentation-actions {
    justify-content: stretch;
  }

  .presentation-actions .btn {
    flex: 1 1 0;
  }

  .policy-fieldset {
    grid-column: span 1;
  }

  .shell {
    padding: 16px;
  }
}