:root {
  --aantc-blue: #003366;
  --aantc-black: #000000;
  --aantc-white: #ffffff;
  --aantc-text-muted: #555555;
  --aantc-surface: #f4f4f4;
  --aantc-surface-raised: #ffffff;
  --aantc-border: #d9d9d9;
  --aantc-border-strong: #b7bec5;
  --aantc-focus: #003366;
  --panel-width: 304px;
  --result-width: 360px;
  --header-height: 64px;
  --condition-height: 76px;
  --workspace-card-radius: 12px;
  --workspace-control-radius: 6px;
  color-scheme: light;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Model 2.0 capability boundary: unavailable controls remain visible but inert. */
.segmented-control button:disabled,
.field select:disabled,
.range-field input:disabled {
  cursor: not-allowed;
  opacity: 1;
}

.segmented-control button:disabled {
  color: #767676;
  background: #e4e6e8;
  border-color: #c6cbd0;
}

.field select:disabled,
.range-field input:disabled {
  color: #6d7378;
  background-color: #e8eaec;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-width: 320px;
  min-height: 100%;
  margin: 0;
}

body {
  background: #e9edf0;
  color: var(--aantc-black);
  font-size: 16px;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input {
  accent-color: var(--aantc-blue);
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--aantc-white);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--aantc-focus);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  margin: -1px !important;
  padding: 0 !important;
  border: 0 !important;
  clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 12px 16px;
  color: var(--aantc-white);
  background: var(--aantc-blue);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  display: grid;
  min-height: var(--header-height);
  grid-template-columns: auto minmax(180px, 1fr) auto;
  align-items: center;
  gap: 24px;
  padding: 8px 24px;
  color: var(--aantc-white);
  background: var(--aantc-black);
  border-bottom: 1px solid #242424;
}

.brand {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 10px;
  color: var(--aantc-white);
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.brand-name {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 10px;
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.header-title {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 2px;
  padding-left: 24px;
  border-left: 1px solid #474747;
}

.header-title span {
  color: #c5c5c5;
  font-size: 14px;
}

.header-title strong {
  overflow: hidden;
  font-size: 18px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.button,
.icon-button,
.text-button {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: var(--workspace-control-radius);
  font-weight: 600;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 18px;
}

.button-primary {
  background: var(--aantc-white);
  color: var(--aantc-black);
}

.button-dark {
  background: #181818;
  border-color: #555555;
  color: var(--aantc-white);
}

.button.is-running .run-icon {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: currentColor;
  font-size: 0;
}

.condition-bar {
  display: grid;
  min-height: var(--condition-height);
  grid-template-columns: minmax(180px, 1.3fr) minmax(180px, 1.2fr) minmax(240px, 1.7fr) repeat(4, minmax(100px, 0.8fr));
  align-items: stretch;
  background: var(--aantc-surface-raised);
  border-bottom: 1px solid var(--aantc-border-strong);
}

.condition-bar > * {
  min-width: 0;
  padding: 12px 16px;
  border-right: 1px solid var(--aantc-border);
}

.condition-intro {
  display: flex;
  align-items: center;
  gap: 12px;
}

.condition-intro div,
.condition-value,
.compact-field {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.condition-intro span:not(.status-dot),
.condition-value span,
.compact-field > span,
.phase-control legend {
  color: var(--aantc-text-muted);
  font-size: 13px;
}

.status-dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border: 2px solid var(--aantc-blue);
  border-radius: 50%;
  background: var(--aantc-white);
}

body.is-running .status-dot {
  background: var(--aantc-blue);
}

.compact-field select,
.field select,
.field input[type="number"],
.field input[type="text"] {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-control-radius);
  background: var(--aantc-white);
  color: var(--aantc-black);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
}

.compact-field select,
.field select {
  appearance: none;
  padding-right: 42px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m4 6 4 4 4-4' fill='none' stroke='%23545d66' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px 16px;
  cursor: pointer;
}

.phase-control {
  min-width: 0;
  margin: 0;
  border: 0;
}

.phase-control legend {
  margin-bottom: 5px;
}

.segmented-control,
.mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.segmented-control button,
.mode-tabs button {
  min-height: 38px;
  padding: 0 8px;
  background: var(--aantc-white);
  border: 1px solid var(--aantc-border-strong);
  border-right-width: 0;
  color: var(--aantc-black);
  font-size: 14px;
  font-weight: 600;
}

.segmented-control button:first-child,
.mode-tabs button:first-child {
  border-radius: var(--workspace-control-radius) 0 0 var(--workspace-control-radius);
}

.segmented-control button:last-child,
.mode-tabs button:last-child {
  border-right-width: 1px;
  border-radius: 0 var(--workspace-control-radius) var(--workspace-control-radius) 0;
}

.segmented-control button.is-active,
.mode-tabs button.is-active {
  background: var(--aantc-blue);
  border-color: var(--aantc-blue);
  color: var(--aantc-white);
}

.condition-value strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.condition-confidence strong {
  color: var(--aantc-blue);
  font-size: 14px;
  white-space: normal;
}

.workspace {
  display: grid;
  min-height: calc(100vh - var(--header-height) - var(--condition-height) - 34px);
  grid-template-columns: var(--panel-width) minmax(460px, 1fr) var(--result-width);
  align-items: stretch;
}

.input-panel,
.results-panel,
.scene-panel {
  min-width: 0;
}

.input-panel,
.results-panel {
  background: var(--aantc-surface-raised);
}

.input-panel {
  border-right: 1px solid var(--aantc-border-strong);
  transition: width 160ms ease, min-width 160ms ease;
}

.input-panel.is-collapsed {
  width: 64px;
  min-width: 64px;
  overflow: hidden;
}

.workspace.is-input-collapsed {
  --panel-width: 64px;
}

.results-panel {
  border-left: 1px solid var(--aantc-border-strong);
}

.panel-heading {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--aantc-border);
}

.panel-title {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.panel-title h1,
.panel-title h2,
.scene-toolbar h2,
.section-heading h2,
.chart-heading h3,
.detail-card h3,
.assumption-card h3 {
  margin: 0;
}

.panel-title h1,
.panel-title h2 {
  font-size: 17px;
  font-weight: 700;
}

.panel-title p,
.scene-toolbar p,
.chart-heading p {
  margin: 3px 0 0;
  color: var(--aantc-text-muted);
  font-size: 13px;
}

.icon-button,
.text-button {
  display: inline-grid;
  min-width: 44px;
  place-items: center;
  background: var(--aantc-white);
  border-color: var(--aantc-border-strong);
  color: var(--aantc-black);
}

.text-button {
  padding: 0 12px;
}

.input-panel.is-collapsed .panel-heading {
  justify-content: center;
  padding: 10px;
}

.input-panel.is-collapsed .panel-title,
.input-panel.is-collapsed .input-panel-body {
  display: none;
}

.input-panel.is-collapsed .panel-toggle svg {
  transform: rotate(180deg);
}

.input-panel-body {
  overflow: auto;
  max-height: calc(100vh - var(--header-height) - var(--condition-height) - 110px);
  scrollbar-width: thin;
}

.control-section {
  padding: 18px 16px;
  border-bottom: 1px solid var(--aantc-border);
}

.section-heading,
.chart-heading,
.detail-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.section-heading h2,
.chart-heading h3,
.detail-card h3,
.assumption-card h3 {
  font-size: 15px;
  font-weight: 700;
}

.source-badge,
.confidence-badge {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 0 8px;
  border: 1px solid var(--aantc-blue);
  color: var(--aantc-blue);
  font-size: 12px;
  font-weight: 700;
}

.confidence-badge {
  border-color: var(--aantc-black);
  color: var(--aantc-black);
}

.mode-tabs {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 14px;
}

.input-mode-description {
  margin: 0 0 14px;
  color: var(--aantc-text-muted);
  font-size: 14px;
  line-height: 1.45;
}

.model-contract-field {
  position: relative;
  z-index: 5;
  margin-bottom: 14px;
}

.model-contract {
  position: relative;
}

.model-contract summary {
  display: flex;
  width: 100%;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 12px;
  color: var(--aantc-black);
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-control-radius);
  background: var(--aantc-white);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  list-style: none;
  cursor: pointer;
}

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

.model-contract summary svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  fill: none;
  stroke: #545d66;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
  transition: transform 160ms ease;
}

.model-contract[open] summary svg {
  transform: rotate(180deg);
}

.model-contract-panel {
  position: absolute;
  z-index: 8;
  top: calc(100% + 4px);
  left: 0;
  width: 100%;
  padding: 12px;
  color: var(--aantc-text-muted);
  border: 1px solid var(--aantc-border-strong);
  border-radius: 3px;
  background: var(--aantc-white);
  box-shadow: 0 14px 36px rgba(0, 20, 40, 0.16);
  font-size: 13px;
  line-height: 1.45;
}

.model-contract p {
  margin: 8px 0 0;
}

#aircraft-input-form > .field:first-of-type {
  margin-top: 0;
}

.aircraft-parameter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
  margin-top: 14px;
}

.aircraft-parameter-grid .compact-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(34px, auto) 44px;
  align-content: start;
  min-width: 0;
  margin-top: 0;
}

.compact-field > span:first-child {
  display: flex;
  min-height: 34px;
  align-items: flex-end;
  line-height: 1.2;
}

.compact-field input,
.compact-field .input-with-unit {
  box-sizing: border-box;
  min-height: 44px;
  width: 100%;
}

.aircraft-parameter-grid .compact-field > input[type="number"],
.aircraft-parameter-grid .compact-field .input-with-unit,
.aircraft-parameter-grid .compact-field .input-with-unit input {
  width: 100%;
  max-width: none;
}

.compact-field .input-with-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-control-radius);
  background: var(--aantc-white);
}

.compact-field .input-with-unit input {
  height: 42px;
  min-width: 0;
  max-width: none;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.compact-field .input-with-unit > span {
  display: flex;
  align-items: center;
  padding: 0 12px 0 8px;
  color: var(--aantc-text-muted);
  font-weight: 600;
}

.field-error {
  display: block;
  grid-column: 1;
  margin-top: 2px;
  color: var(--aantc-black);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.35;
}

.field-error:empty {
  display: none;
}

.compact-field.has-error > input,
.compact-field.has-error .input-with-unit {
  border-color: var(--aantc-black);
  box-shadow: inset 0 0 0 1px var(--aantc-black);
}

html[data-theme="dark"] .model-contract summary,
html[data-theme="dark"] .field-error {
  color: var(--aantc-white);
}

html[data-theme="dark"] .model-contract-panel {
  background: var(--aantc-surface-raised);
}

html[data-theme="dark"] .model-contract summary svg {
  stroke: var(--aantc-white);
}

html[data-theme="dark"] .compact-field.has-error > input,
html[data-theme="dark"] .compact-field.has-error .input-with-unit {
  border-color: var(--aantc-white);
  box-shadow: inset 0 0 0 1px var(--aantc-white);
}

.parameter-span-full {
  grid-column: 1;
}

.check-field {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 0 12px;
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-control-radius);
  color: var(--aantc-black);
  font-size: 14px;
  font-weight: 600;
}

.check-field input {
  width: 18px;
  height: 18px;
  margin: 0;
}

#aircraft-input-form[data-mode="database"] input[readonly],
#aircraft-input-form[data-mode="database"] .check-field {
  background: color-mix(in srgb, var(--aantc-white) 80%, var(--aantc-border));
}

#aircraft-input-form[data-mode="database"] .check-field {
  color: var(--aantc-text-muted);
}

#aircraft-input-form [hidden] {
  display: none;
}

.field,
.range-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
  color: var(--aantc-text-muted);
  font-size: 14px;
  font-weight: 500;
}

.field-inline {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.input-with-unit {
  display: flex;
  align-items: center;
  gap: 8px;
}

.input-with-unit input {
  max-width: 86px;
  padding-right: 8px;
}

.data-state {
  display: grid;
  gap: 7px;
  margin-top: 14px;
  color: var(--aantc-text-muted);
  font-size: 13px;
}

.data-state span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.state-mark {
  width: 9px;
  height: 9px;
  border: 2px solid var(--aantc-blue);
  border-radius: 50%;
}

.state-missing {
  border-color: var(--aantc-black);
}

.section-value {
  color: var(--aantc-blue);
  font-size: 13px;
  font-weight: 700;
}

.range-field input {
  width: 100%;
}

.range-limits {
  display: flex;
  justify-content: space-between;
  color: #6d7378;
  font-size: 12px;
}

.ground-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}

.ground-option {
  position: relative;
  display: grid;
  min-height: 72px;
  grid-template-rows: 26px auto;
  place-items: center;
  gap: 4px;
  padding: 10px 4px;
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-control-radius);
  color: var(--aantc-text-muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.ground-option:has(input:checked) {
  border: 2px solid var(--aantc-blue);
  color: var(--aantc-blue);
}

.ground-option input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.ground-option input:focus-visible + .ground-swatch {
  outline: 2px solid var(--aantc-white);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--aantc-focus);
}

.ground-swatch {
  display: block;
  width: 38px;
  height: 24px;
  border: 1px solid rgba(0, 0, 0, 0.3);
  border-radius: 4px;
}

.ground-swatch-grass {
  background: repeating-linear-gradient(105deg, #6c7b59 0 2px, #879575 2px 5px);
}

.ground-swatch-concrete {
  background: #a7aaac;
}

.ground-swatch-water {
  background: repeating-linear-gradient(0deg, #667b88 0 3px, #899aa4 3px 5px);
}

.advanced-controls {
  margin: 16px;
  border: 1px solid var(--aantc-border);
  border-radius: var(--workspace-control-radius);
}

.advanced-controls summary {
  min-height: 44px;
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.advanced-controls dl {
  margin: 0;
  padding: 0 12px 12px;
}

.advanced-controls dl div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-top: 1px solid var(--aantc-border);
  font-size: 13px;
}

.advanced-controls dt {
  color: var(--aantc-text-muted);
}

.advanced-controls dd {
  margin: 0;
  text-align: right;
}

.scene-panel {
  display: grid;
  min-height: 680px;
  grid-template-rows: minmax(460px, 1fr);
  background: #eef1f3;
}

.scene-toolbar,
.scene-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--aantc-surface-raised);
  border-bottom: 1px solid var(--aantc-border);
}

.scene-toolbar h2 {
  font-size: 17px;
}

.scene-actions {
  display: flex;
  gap: 6px;
}

.scene-frame {
  position: relative;
  min-height: 460px;
  overflow: hidden;
  background: #edf0f2;
}

.model-loading {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--aantc-text-muted);
  text-align: center;
}

.model-loading.is-visible {
  display: flex;
}

.model-loading strong {
  color: var(--aantc-black);
}

.loading-spinner {
  width: 34px;
  height: 34px;
  border: 3px solid var(--aantc-border);
  border-top-color: var(--aantc-blue);
  border-radius: 50%;
  animation: spinner 800ms linear infinite;
}

.scene-footer {
  align-items: flex-start;
  border-top: 1px solid var(--aantc-border);
  border-bottom: 0;
  color: var(--aantc-text-muted);
  font-size: 13px;
  line-height: 1.45;
}

.scene-footer p {
  max-width: 560px;
  margin: 0;
}

.scene-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.scene-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.legend-line {
  display: block;
  width: 28px;
  height: 0;
  border-top: 2px solid var(--aantc-blue);
}

.legend-line-dashed {
  border-top-color: #606970;
  border-top-style: dashed;
}

.results-panel {
  overflow: auto;
  max-height: calc(100vh - var(--header-height) - var(--condition-height) - 34px);
}

.result-context {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--aantc-border);
}

.result-context h3 {
  margin: 0 0 4px;
  color: var(--aantc-text-muted);
  font-size: 14px;
  font-weight: 500;
}

.result-context strong {
  display: block;
  font-size: 16px;
  line-height: 1.35;
}

.result-context > span {
  flex: 0 0 auto;
  color: var(--aantc-text-muted);
  font-size: 14px;
  line-height: 1.45;
  text-align: right;
}

.result-kind {
  display: block;
  margin-top: 4px;
  color: var(--aantc-text-muted);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.35;
}

.result-feedback {
  padding: 12px 16px;
  background: var(--aantc-surface);
  border-bottom: 1px solid var(--aantc-border);
  border-left: 3px solid var(--aantc-blue);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.45;
}

.result-feedback[hidden] {
  display: none;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--aantc-border);
  border-bottom: 1px solid var(--aantc-border);
}

.metric {
  min-height: 134px;
  padding: 16px;
  background: var(--aantc-surface-raised);
}

.metric.is-unavailable {
  color: var(--aantc-text-muted);
  background: color-mix(in srgb, var(--aantc-surface-raised) 72%, var(--aantc-border));
}

.metric.is-unavailable strong,
.metric.is-unavailable strong small {
  color: var(--aantc-text-muted);
}

.metric-symbol {
  display: block;
  color: var(--aantc-text-muted);
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
}

.metric-symbol i {
  font-family: inherit;
  font-style: italic;
}

.metric-symbol sub {
  font-size: 0.62em;
}

.metric strong {
  display: block;
  margin-top: 8px;
  color: var(--aantc-blue);
  font-size: 30px;
  letter-spacing: -0.03em;
}

.metric strong small {
  color: var(--aantc-black);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}

.metric p {
  margin: 7px 0 0;
  color: var(--aantc-text-muted);
  font-size: 14px;
  line-height: 1.35;
}

.chart-card,
.detail-card,
.assumption-card {
  padding: 18px 16px;
  border-bottom: 1px solid var(--aantc-border);
}

.spectrum-chart {
  position: relative;
  display: grid;
  height: 188px;
  grid-template-columns: 26px 1fr;
  align-items: stretch;
  margin-top: 6px;
}

.chart-y-labels {
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-bottom: 2px;
  color: var(--aantc-text-muted);
  font-size: 11px;
}

.chart-grid {
  position: absolute;
  inset: 0 0 0 26px;
  background: repeating-linear-gradient(to bottom, transparent 0 61px, var(--aantc-border) 61px 62px);
  border-bottom: 1px solid var(--aantc-border-strong);
  border-left: 1px solid var(--aantc-border-strong);
}

.spectrum-bars {
  z-index: 1;
  display: flex;
  grid-column: 2;
  align-items: end;
  justify-content: space-between;
  gap: 3px;
  padding: 0 5px;
}

.spectrum-bar {
  position: relative;
  min-width: 5px;
  flex: 1;
  height: var(--bar-height);
  max-width: 16px;
  background: var(--aantc-blue);
  border: 1px solid var(--aantc-blue);
  transition: height 160ms ease;
}

.spectrum-axis {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding-left: 26px;
  color: var(--aantc-text-muted);
  font-size: 11px;
  text-align: center;
}

.chart-note {
  margin: 14px 0 0;
  padding: 10px;
  background: var(--aantc-surface);
  color: var(--aantc-text-muted);
  font-size: 13px;
  line-height: 1.45;
}

.detail-card-heading span {
  color: var(--aantc-text-muted);
  font-size: 12px;
}

.detail-list {
  margin: 0;
}

.detail-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-top: 1px solid var(--aantc-border);
  font-size: 13px;
}

.detail-list dt {
  color: var(--aantc-text-muted);
}

.detail-list dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.assumption-card {
  background: var(--aantc-surface);
}

.assumption-card ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--aantc-text-muted);
  font-size: 13px;
  line-height: 1.5;
}

.live-status {
  position: fixed;
  z-index: 20;
  right: 18px;
  bottom: 18px;
  max-width: 320px;
  padding: 12px 16px;
  background: var(--aantc-black);
  color: var(--aantc-white);
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.live-status.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.noscript-message {
  position: fixed;
  z-index: 30;
  right: 16px;
  bottom: 16px;
  left: 16px;
  padding: 16px;
  background: var(--aantc-white);
  border: 2px solid var(--aantc-blue);
}

@keyframes spinner {
  to { transform: rotate(360deg); }
}

@media (max-width: 1320px) {
  :root {
    --result-width: 328px;
    --panel-width: 280px;
  }

  .condition-bar {
    grid-template-columns: minmax(180px, 1fr) minmax(170px, 1fr) minmax(220px, 1.4fr) repeat(3, minmax(95px, 0.7fr));
  }

  .condition-confidence {
    display: none;
  }
}

@media (max-width: 1100px) {
  .condition-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .condition-bar > * {
    min-height: 68px;
  }

  .condition-value:nth-of-type(4),
  .condition-value:nth-of-type(5) {
    display: none;
  }

  .workspace {
    grid-template-columns: var(--panel-width) minmax(0, 1fr);
  }

  .results-panel {
    max-height: none;
    grid-column: 1 / -1;
    border-top: 1px solid var(--aantc-border-strong);
    border-left: 0;
  }

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

  .chart-card,
  .detail-card,
  .assumption-card {
    max-width: none;
  }
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px;
    padding: 8px 14px;
  }

  .header-title {
    padding-left: 12px;
  }

  .header-actions {
    grid-column: 1 / -1;
  }

  .header-actions .button {
    flex: 1;
  }

  .condition-bar {
    grid-template-columns: 1fr 1fr;
  }

  .condition-intro,
  .phase-control {
    grid-column: 1 / -1;
  }

  .condition-bar .condition-value {
    display: flex;
  }

  .condition-confidence {
    display: none !important;
  }

  .workspace,
  .workspace.is-input-collapsed {
    --panel-width: 100%;
    display: block;
  }

  .input-panel,
  .input-panel.is-collapsed {
    width: 100%;
    min-width: 100%;
    border-right: 0;
  }

  .input-panel.is-collapsed .panel-heading {
    justify-content: space-between;
    padding: 14px 16px;
  }

  .input-panel.is-collapsed .panel-title {
    display: flex;
  }

  .input-panel-body {
    max-height: none;
  }

  .scene-panel {
    min-height: 0;
    grid-template-rows: minmax(390px, auto);
  }

  .scene-toolbar,
  .scene-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .scene-actions {
    width: 100%;
  }

  .scene-actions .text-button {
    flex: 1;
  }

  .scene-frame {
    min-height: 390px;
  }

  .scene-legend {
    justify-content: flex-start;
  }

  .results-panel {
    max-height: none;
  }
}

@media (max-width: 460px) {
  .brand-name {
    display: none;
  }

  .header-title strong {
    font-size: 16px;
  }

  .condition-bar {
    display: block;
  }

  .condition-bar > * {
    min-height: 64px;
    border-right: 0;
    border-bottom: 1px solid var(--aantc-border);
  }

  .condition-value {
    display: none !important;
  }

  .metric-grid {
    grid-template-columns: 1fr;
  }

  .metric {
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media (forced-colors: active) {
  .segmented-control button.is-active,
  .mode-tabs button.is-active,
  .spectrum-bar {
    border: 1px solid CanvasText;
  }
}

/* Revised floating-workspace layout. The public header mirrors the shared AANTC page shell. */
:root {
  --header-height: 88px;
  --panel-width: 300px;
  --result-width: 360px;
  --workspace-gap: 16px;
}

body {
  background: var(--aantc-surface);
}

body.menu-open {
  overflow: hidden;
}

.shell {
  width: min(calc(100% - 48px), 1440px);
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  display: block;
  height: var(--header-height);
  min-height: 0;
  padding: 0;
  color: var(--aantc-blue);
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--aantc-border);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  min-height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand-cluster {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 18px;
}

.brand,
.institution-brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: inherit;
  text-decoration: none;
}

.aantc-lockup {
  display: inline-flex;
  height: 56px;
  align-items: stretch;
}

.brand .brand-symbol {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.brand-initials {
  display: grid;
  width: 15px;
  height: 56px;
  grid-template-rows: repeat(5, 1fr);
  align-items: center;
  color: var(--aantc-blue);
  font-size: 12px;
  font-style: italic;
  font-weight: 700;
  letter-spacing: -0.08em;
  line-height: 0.8;
  text-align: center;
}

.brand-divider {
  width: 1px;
  align-self: stretch;
  background: var(--aantc-border);
}

.institution-brand img {
  width: 176px;
  height: auto;
  max-height: 52px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 1.7vw, 28px);
  font-size: 16px;
  font-weight: 600;
}

.site-nav > a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}

.mobile-institution-link {
  display: none !important;
}

.site-nav > a:not(.nav-action)::after {
  position: absolute;
  right: 0;
  bottom: 6px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.site-nav > a:hover::after,
.site-nav > a:focus-visible::after,
.site-nav > a[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav .nav-action {
  padding: 0 18px;
  color: var(--aantc-white);
  border-radius: 3px;
  background: var(--aantc-blue);
}

.header-controls {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 16px;
  border-left: 1px solid var(--aantc-border);
}

.header-control {
  display: inline-grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  color: inherit;
  border: 1px solid currentColor;
  border-radius: 3px;
  background: transparent;
}

.header-control:hover,
.header-control:focus-visible {
  color: var(--aantc-white);
  background: var(--aantc-blue);
}

.header-control svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.theme-icon-sun {
  display: none;
}

html[data-theme="dark"] .theme-icon-moon {
  display: none;
}

html[data-theme="dark"] .theme-icon-sun {
  display: block;
}

.language-notice {
  position: absolute;
  z-index: 120;
  top: calc(100% + 12px);
  right: 0;
  width: min(320px, calc(100vw - 32px));
  padding: 16px 18px;
  color: var(--aantc-black);
  background: var(--aantc-white);
  border: 1px solid var(--aantc-blue);
  border-radius: 3px;
  box-shadow: 0 18px 48px rgb(0 33 71 / 18%);
}

.language-notice[hidden] {
  display: none;
}

.language-notice p {
  margin: 0;
  font-size: 15px;
  line-height: 1.45;
}

.language-notice p + p {
  margin-top: 6px;
}

.menu-toggle {
  display: none;
  min-width: 76px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: inherit;
  border: 0;
  border-radius: 3px;
  background: transparent;
  font-size: 16px;
  font-weight: 600;
}

.menu-lines {
  position: relative;
  width: 22px;
  height: 2px;
  margin-left: 10px;
  background: currentColor;
}

.menu-lines::before,
.menu-lines::after {
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  content: "";
  transition: top 160ms ease, transform 160ms ease, background-color 160ms ease;
}

.menu-lines::before { top: -7px; }
.menu-lines::after { top: 7px; }
.menu-toggle[aria-expanded="true"] .menu-lines { background: transparent; }
.menu-toggle[aria-expanded="true"] .menu-lines::before { top: 0; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-lines::after { top: 0; transform: rotate(-45deg); }

.workspace-main {
  min-height: 100svh;
  padding-top: calc(var(--header-height) + 24px);
}

.edge-reveal-zone {
  display: none;
}

@media (min-width: 901px) and (hover: hover) and (pointer: fine) {
  .edge-reveal-zone {
    position: fixed;
    z-index: 7;
    display: block;
    background: transparent;
  }

  .edge-reveal-zone-top {
    top: var(--header-height);
    right: 0;
    left: 0;
    height: 12px;
  }

  .edge-reveal-zone-left,
  .edge-reveal-zone-right {
    top: var(--header-height);
    bottom: 0;
    width: 12px;
  }

  .edge-reveal-zone-left {
    left: 0;
  }

  .edge-reveal-zone-right {
    right: 0;
  }
}

.workspace-shell {
  width: min(calc(100% - 48px), 1600px);
  margin-inline: auto;
  padding-bottom: 32px;
}

.collapsible-card,
.input-panel,
.results-panel,
.scene-panel {
  color: var(--aantc-black);
  background: var(--aantc-white);
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-card-radius);
  box-shadow: 0 8px 24px rgb(0 33 71 / 5%);
}

.scenario-card {
  overflow: hidden;
  margin-bottom: var(--workspace-gap);
}

.scenario-card-heading {
  display: flex;
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 18px;
}

.scenario-card-heading h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.scenario-card-heading p {
  margin: 6px 0 0;
  color: var(--aantc-text-muted);
  font-size: 14px;
}

.card-toggle:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.condition-summary {
  display: grid;
  max-height: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  padding: 0 18px;
  opacity: 0;
  transition: max-height 160ms ease, padding 160ms ease, opacity 120ms ease;
}

.condition-summary > div {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 4px;
  padding: 0 16px;
  border-left: 1px solid var(--aantc-border);
}

.condition-summary > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.condition-summary span {
  color: var(--aantc-text-muted);
  font-size: 12px;
}

.condition-summary strong {
  overflow: hidden;
  font-size: 15px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scenario-editor-shell {
  display: grid;
  grid-template-rows: 1fr;
  opacity: 1;
  transition: grid-template-rows 160ms ease, opacity 120ms ease;
}

.scenario-editor-shell[hidden],
.input-panel-body[hidden],
.results-panel-body[hidden] {
  display: none;
}

.scenario-editor {
  min-height: 0;
  overflow: hidden;
  border-top: 1px solid var(--aantc-border);
}

.scenario-card.is-collapsed .scenario-editor-shell {
  grid-template-rows: 0fr;
  opacity: 0;
}

.scenario-card.is-collapsed .condition-summary {
  max-height: 84px;
  padding-top: 0;
  padding-bottom: 16px;
  opacity: 1;
}

.card-toggle .action-arrow-icon {
  transform: rotate(-90deg);
}

.scenario-card.is-collapsed .card-toggle .action-arrow-icon {
  display: inline-block;
  transform: rotate(90deg);
}

.phase-control {
  padding: 18px;
}

.phase-control legend {
  margin-bottom: 12px;
  color: var(--aantc-black);
  font-size: 15px;
  font-weight: 700;
}

.scenario-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.scenario-options button {
  display: grid;
  min-height: 64px;
  grid-template-columns: 32px 1fr;
  grid-template-rows: auto;
  align-items: center;
  align-content: center;
  gap: 4px 10px;
  padding: 12px;
  color: var(--aantc-black);
  background: var(--aantc-white);
  border: 1px solid var(--aantc-border-strong);
  border-radius: var(--workspace-control-radius);
  text-align: left;
}

.scenario-options button:hover,
.scenario-options button.is-active {
  border-color: var(--aantc-blue);
}

.scenario-options button.is-active {
  box-shadow: inset 0 0 0 1px var(--aantc-blue);
}

.scenario-options button > strong {
  align-self: center;
  font-size: 15px;
}

.scenario-options button > span:last-child {
  align-self: start;
  color: var(--aantc-text-muted);
  font-size: 13px;
}

.scenario-parameters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 0 18px 18px;
}

.scenario-parameters[hidden] {
  display: none;
}

.scenario-field {
  display: grid;
  grid-template-columns: 1fr auto;
  margin: 0;
  padding: 14px;
  background: var(--aantc-surface);
  border-radius: var(--workspace-control-radius);
}

.scenario-field input,
.scenario-field .range-limits {
  grid-column: 1 / -1;
}

.scenario-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--aantc-border);
}

.scenario-actions:has(#confirm-condition[hidden]) {
  display: none;
}

.button-primary {
  color: var(--aantc-white);
  background: var(--aantc-blue);
  border-color: var(--aantc-blue);
}

.button-secondary {
  color: var(--aantc-blue);
  background: var(--aantc-white);
  border-color: var(--aantc-blue);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.workspace {
  display: grid;
  min-height: 680px;
  grid-template-columns: var(--panel-width) minmax(460px, 1fr) var(--result-width);
  gap: var(--workspace-gap);
  align-items: stretch;
}

.input-panel,
.results-panel,
.scene-panel {
  min-width: 0;
  overflow: hidden;
}

.input-panel,
.results-panel {
  border-right: 1px solid var(--aantc-border-strong);
  border-left: 1px solid var(--aantc-border-strong);
}

.scene-panel {
  min-height: 680px;
}

.workspace.is-input-collapsed {
  --panel-width: 64px;
}

.workspace.is-results-collapsed {
  --result-width: 64px;
}

.input-panel.is-collapsed,
.results-panel.is-collapsed {
  width: 64px;
  min-width: 64px;
}

.input-panel-body,
.results-panel-body {
  display: block;
  max-height: calc(100vh - var(--header-height) - 190px);
  overflow: auto;
  opacity: 1;
  transition: max-height 160ms ease, opacity 120ms ease;
}

.input-panel.is-collapsed .input-panel-body,
.results-panel.is-collapsed .results-panel-body {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.input-panel.is-collapsed .panel-heading,
.results-panel.is-collapsed .panel-heading {
  justify-content: center;
  padding: 10px;
}

.input-panel.is-collapsed .panel-title,
.results-panel.is-collapsed .panel-title,
.results-panel.is-collapsed .confidence-badge {
  display: none;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.results-panel.is-collapsed .panel-actions {
  display: block;
}

.results-panel.is-collapsed .panel-toggle svg {
  display: inline-block;
  transform: rotate(180deg);
}

.results-panel {
  max-height: none;
}

.results-panel-body {
  max-height: calc(100vh - var(--header-height) - 190px);
}

.scene-frame {
  min-height: 500px;
}

html[data-theme="dark"] body {
  color: var(--aantc-white);
  background: var(--aantc-black);
}

html[data-theme="dark"] {
  --aantc-text-muted: #b8bdc2;
  --aantc-surface: #101010;
  --aantc-surface-raised: #151515;
  --aantc-border: #333333;
  --aantc-border-strong: #4a4a4a;
  --aantc-focus: #ffffff;
  color-scheme: dark;
}

html[data-theme="dark"] .site-header {
  color: var(--aantc-white);
  background: rgba(0, 0, 0, 0.97);
  border-bottom-color: #383838;
}

html[data-theme="dark"] .brand-initials {
  color: var(--aantc-white);
}

html[data-theme="dark"] .collapsible-card,
html[data-theme="dark"] .condition-bar,
html[data-theme="dark"] .input-panel,
html[data-theme="dark"] .results-panel,
html[data-theme="dark"] .scene-panel,
html[data-theme="dark"] .scenario-options button,
html[data-theme="dark"] .icon-button,
html[data-theme="dark"] .text-button {
  color: var(--aantc-white);
  background: #0b0b0b;
  border-color: #383838;
}

html[data-theme="dark"] .scenario-field,
html[data-theme="dark"] .assumption-card,
html[data-theme="dark"] .metric {
  background: #151515;
}

html[data-theme="dark"] .compact-field select,
html[data-theme="dark"] .field select,
html[data-theme="dark"] .field input[type="number"],
html[data-theme="dark"] .field input[type="text"],
html[data-theme="dark"] .compact-field .input-with-unit,
html[data-theme="dark"] .check-field,
html[data-theme="dark"] .model-contract summary {
  color: var(--aantc-white);
  background-color: #151515;
  border-color: #4a4a4a;
}

html[data-theme="dark"] .compact-field select,
html[data-theme="dark"] .field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m4 6 4 4 4-4' fill='none' stroke='%23ffffff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

html[data-theme="dark"] #aircraft-input-form[data-mode="database"] input[readonly],
html[data-theme="dark"] #aircraft-input-form[data-mode="database"] .check-field {
  color: #aeb4b9;
  background: #242424;
}

html[data-theme="dark"] .section-value,
html[data-theme="dark"] .condition-confidence strong,
html[data-theme="dark"] .detail-list dd,
html[data-theme="dark"] .metric strong {
  color: var(--aantc-white);
}

html[data-theme="dark"] .metric strong small {
  color: #c7c7c7;
}

html[data-theme="dark"] .metric.is-unavailable {
  background: #202020;
}

html[data-theme="dark"] .metric.is-unavailable strong,
html[data-theme="dark"] .metric.is-unavailable strong small {
  color: #9da3a8;
}

html[data-theme="dark"] .result-feedback {
  background: #151515;
  border-color: #383838;
  border-left-color: var(--aantc-white);
}

html[data-theme="dark"] .result-kind {
  color: #c7c7c7;
}

html[data-theme="dark"] .source-badge,
html[data-theme="dark"] .confidence-badge {
  color: var(--aantc-white);
  border-color: #8f969c;
}

html[data-theme="dark"] .scene-frame {
  background: #101214;
}

html[data-theme="dark"] .phase-control legend,
html[data-theme="dark"] .scenario-options button {
  color: var(--aantc-white);
}

html[data-theme="dark"] .button-secondary {
  color: var(--aantc-white);
  background: var(--aantc-black);
  border-color: var(--aantc-white);
}

@media (max-width: 1240px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    z-index: 101;
    inset: var(--header-height) 0 auto;
    display: none;
    max-height: calc(100svh - var(--header-height));
    overflow-y: auto;
    padding: 24px 32px 32px;
    color: var(--aantc-black);
    background: var(--aantc-white);
    border-bottom: 1px solid var(--aantc-border);
  }

  .site-nav[data-open="true"] {
    display: grid;
  }

  .site-nav > a {
    min-height: 52px;
    border-bottom: 1px solid var(--aantc-border);
    font-size: 18px;
  }

  .site-nav .nav-action {
    justify-content: center;
    margin-top: 12px;
  }

  .site-nav .header-controls {
    flex-wrap: wrap;
    justify-content: flex-start;
    margin-top: 20px;
    padding: 20px 0 0;
    border-top: 1px solid var(--aantc-border);
    border-left: 0;
  }

  .site-nav .language-notice {
    position: static;
    flex-basis: 100%;
    width: 100%;
    margin-top: 8px;
    box-shadow: none;
  }

  html[data-theme="dark"] .site-nav {
    color: var(--aantc-white);
    background: var(--aantc-black);
  }
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: var(--panel-width) minmax(0, 1fr);
  }

  .results-panel,
  .results-panel.is-collapsed {
    width: auto;
    min-width: 0;
    grid-column: 1 / -1;
  }

  .results-panel.is-collapsed .panel-title {
    display: flex;
  }

  .results-panel.is-collapsed .panel-heading {
    justify-content: space-between;
    padding: 14px 16px;
  }

  .workspace.is-results-collapsed {
    --result-width: 100%;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 76px;
  }

  .shell,
  .workspace-shell {
    width: min(calc(100% - 32px), 1600px);
  }

  .brand .brand-symbol,
  .aantc-lockup,
  .brand-initials {
    height: 46px;
  }

  .brand .brand-symbol {
    width: 46px;
  }

  .institution-brand img {
    width: auto;
    height: 42px;
  }

  .scenario-card-heading {
    align-items: flex-start;
  }

  .condition-summary,
  .scenario-options,
  .scenario-parameters {
    grid-template-columns: 1fr;
  }

  .condition-summary > div {
    padding: 8px 0;
    border-top: 1px solid var(--aantc-border);
    border-left: 0;
  }

  .condition-summary > div:first-child {
    border-top: 0;
  }

  .scenario-card.is-collapsed .condition-summary {
    max-height: 280px;
  }

  .scenario-actions {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .workspace,
  .workspace.is-input-collapsed,
  .workspace.is-results-collapsed {
    --panel-width: 100%;
    display: block;
  }

  .input-panel,
  .input-panel.is-collapsed,
  .results-panel,
  .results-panel.is-collapsed,
  .scene-panel {
    width: 100%;
    min-width: 100%;
    margin-bottom: var(--workspace-gap);
  }

  .input-panel.is-collapsed .panel-title,
  .results-panel.is-collapsed .panel-title {
    display: flex;
  }

  .input-panel.is-collapsed .panel-heading,
  .results-panel.is-collapsed .panel-heading {
    justify-content: space-between;
    padding: 14px 16px;
  }

  .input-panel-body,
  .results-panel-body {
    max-height: none;
  }

  .scene-actions {
    flex-wrap: wrap;
  }

  .scene-actions .button-primary {
    flex-basis: 100%;
  }
}

@media (max-width: 460px) {
  .institution-brand {
    display: none;
  }

  .brand-divider {
    display: none;
  }

  .site-nav .mobile-institution-link {
    display: inline-flex !important;
  }

}

@media (prefers-reduced-motion: reduce) {
  .scenario-editor-shell,
  .condition-summary,
  .input-panel-body,
  .results-panel-body {
    transition-duration: 0.001ms;
  }
}

/* Immersive workspace: the scene owns the viewport and controls float above it. */
@media (min-width: 901px) {
  .workspace-main {
    position: relative;
    height: 100svh;
    min-height: 640px;
    overflow: hidden;
    padding-top: var(--header-height);
    background: #edf0f2;
  }

  .workspace-shell {
    position: relative;
    width: 100%;
    height: calc(100svh - var(--header-height));
    min-height: 576px;
    margin: 0;
    padding: 0;
  }

  .workspace {
    position: absolute;
    inset: 0;
    display: block;
    min-height: 0;
  }

  .scene-panel {
    position: absolute;
    z-index: 1;
    inset: 0;
    display: block;
    min-height: 0;
    overflow: hidden;
    background: #edf0f2;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .scene-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-height: 0;
  }

  .scenario-card {
    position: absolute;
    z-index: 10;
    top: 16px;
    left: 50%;
    width: min(680px, calc(100% - 760px));
    min-width: 500px;
    max-height: calc(100% - 32px);
    margin: 0;
    overflow: auto;
    background: rgba(255, 255, 255, 0.96);
    transform: translateX(-50%);
  }

  .scenario-card-heading {
    min-height: 68px;
    gap: 16px;
    padding: 12px 14px;
  }

  .scenario-card-heading h1 {
    font-size: clamp(1.25rem, 1.6vw, 1.5rem);
  }

  .scenario-card.is-collapsed {
    display: grid;
    grid-template-columns: 185px minmax(0, 1fr);
    overflow: hidden;
  }

  .scenario-card.is-collapsed .scenario-card-heading {
    min-height: 64px;
    padding: 8px 10px 8px 14px;
  }

  .scenario-card.is-collapsed .scenario-card-heading h1 {
    font-size: 16px;
    letter-spacing: -0.01em;
  }

  .scenario-card.is-collapsed .scenario-card-heading p {
    display: none;
  }

  .scenario-card.is-collapsed .condition-summary {
    max-height: 64px;
    align-items: center;
    grid-template-columns: 1.5fr repeat(2, minmax(0, 1fr));
    padding: 8px 12px 8px 0;
  }

  .scenario-card.is-collapsed .condition-summary > div {
    gap: 1px;
    padding: 0 8px;
  }

  .scenario-card.is-collapsed .condition-summary span {
    font-size: 11px;
  }

  .scenario-card.is-collapsed .condition-summary strong {
    font-size: 13px;
  }

  .scenario-card.is-collapsed .scenario-editor-shell {
    grid-column: 1 / -1;
  }

  .input-panel,
  .results-panel {
    position: absolute;
    z-index: 8;
    top: 76px;
    bottom: 24px;
    min-width: 0;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(183, 190, 197, 0.88);
    border-radius: var(--workspace-card-radius);
    box-shadow: 0 12px 36px rgba(0, 33, 71, 0.09);
  }

  .input-panel {
    top: 76px;
    left: 24px;
    width: 292px;
  }

  .results-panel {
    right: 24px;
    width: 344px;
  }

  .input-panel-body,
  .results-panel-body {
    max-height: calc(100% - 74px);
  }

  .input-panel.is-collapsed,
  .results-panel.is-collapsed {
    bottom: auto;
    width: 56px;
    min-width: 56px;
  }

  .input-panel.is-collapsed .panel-heading,
  .results-panel.is-collapsed .panel-heading {
    min-height: 56px;
    padding: 6px;
  }

  .scene-toolbar {
    position: absolute;
    z-index: 5;
    right: auto;
    bottom: 24px;
    left: 50%;
    width: min(620px, calc(100% - 760px));
    min-width: 500px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid rgba(183, 190, 197, 0.88);
    border-radius: var(--workspace-card-radius);
    box-shadow: 0 8px 28px rgba(0, 33, 71, 0.08);
    transform: translateX(-50%);
  }

  .scene-toolbar p {
    margin-top: 2px;
  }

  .scene-footer {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }

  html[data-theme="dark"] .workspace-main,
  html[data-theme="dark"] .scene-panel {
    background: #12171b;
  }

  html[data-theme="dark"] .scenario-card,
  html[data-theme="dark"] .input-panel,
  html[data-theme="dark"] .results-panel,
  html[data-theme="dark"] .scene-toolbar {
    color: var(--aantc-white);
    background: rgba(11, 11, 11, 0.94);
    border-color: #444a4f;
  }
}

@media (min-width: 901px) and (max-width: 1240px) {
  .scenario-card {
    width: min(680px, calc(100% - 48px));
    min-width: 0;
  }

  .scenario-card.is-collapsed {
    right: 316px;
    left: 284px;
    width: auto;
    min-width: 0;
    transform: none;
  }

  .scenario-card.is-collapsed .condition-summary > div:nth-child(3) {
    display: none;
  }

  .scenario-card.is-collapsed .condition-summary {
    grid-template-columns: 1.5fr minmax(0, 1fr);
  }

  .input-panel {
    left: 16px;
    width: 252px;
  }

  .results-panel {
    right: 16px;
    width: 284px;
  }

  .scene-toolbar {
    right: 316px;
    left: 284px;
    width: auto;
    min-width: 0;
    transform: none;
  }

  .scene-toolbar,
  .scene-actions {
    flex-wrap: wrap;
  }

  .workspace-shell:has(.scenario-card:not(.is-collapsed)) .input-panel,
  .workspace-shell:has(.scenario-card:not(.is-collapsed)) .results-panel {
    top: 330px;
  }
}

@media (max-width: 900px) {
  .workspace-main {
    padding-top: calc(var(--header-height) + 16px);
  }

  .workspace-shell {
    padding-bottom: 24px;
  }

  .scenario-card {
    width: 100%;
  }

  .workspace,
  .workspace.is-input-collapsed,
  .workspace.is-results-collapsed {
    --panel-width: 100%;
    display: block;
  }

  .input-panel,
  .input-panel.is-collapsed,
  .results-panel,
  .results-panel.is-collapsed,
  .scene-panel {
    width: 100%;
    min-width: 100%;
    margin-bottom: var(--workspace-gap);
  }

  .input-panel.is-collapsed .panel-title,
  .results-panel.is-collapsed .panel-title {
    display: flex;
  }

  .input-panel.is-collapsed .panel-heading,
  .results-panel.is-collapsed .panel-heading {
    justify-content: space-between;
    padding: 14px 16px;
  }

  .input-panel-body,
  .results-panel-body {
    max-height: none;
  }

  .scene-panel {
    min-height: 0;
    grid-template-rows: auto auto;
  }

  .scene-frame {
    min-height: 0;
    aspect-ratio: 900 / 560;
  }

}

@media (max-width: 460px) {
  .scene-panel {
    min-height: 0;
  }

  .scene-toolbar,
  .scene-footer {
    align-items: stretch;
    flex-direction: column;
  }

}

/* Final workspace-card title normalization. */
.scenario-card-heading,
.panel-heading {
  min-height: 68px;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
}

.scenario-card-heading h1,
.panel-title h2,
.scene-toolbar h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.panel-title {
  gap: 0;
}

.scenario-options button {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: center;
  padding: 12px 14px;
  text-align: center;
}

.scenario-options button > strong {
  align-self: center;
  font-size: 16px;
  line-height: 1.2;
}

.scenario-options.segmented-control {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
}

.scenario-options.segmented-control button {
  display: flex;
  min-height: 44px;
  justify-content: center;
  padding: 0 14px;
  background: var(--aantc-white);
  border: 1px solid var(--aantc-border-strong);
  border-right-width: 0;
  border-radius: 0;
  color: var(--aantc-black);
  text-align: center;
  box-shadow: none;
}

.scenario-options.segmented-control button:first-child {
  border-radius: var(--workspace-control-radius) 0 0 var(--workspace-control-radius);
}

.scenario-options.segmented-control button:last-child {
  border-right-width: 1px;
  border-radius: 0 var(--workspace-control-radius) var(--workspace-control-radius) 0;
}

.scenario-options.segmented-control button.is-active {
  color: var(--aantc-white);
  background: var(--aantc-blue);
  border-color: var(--aantc-blue);
}

html[data-theme="dark"] .scenario-options.segmented-control button.is-active {
  color: var(--aantc-black);
  background: var(--aantc-white);
  border-color: var(--aantc-white);
}

@media (max-width: 680px) {
  .scenario-options.segmented-control {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .scenario-options.segmented-control button {
    min-height: 52px;
    padding: 4px 6px;
  }

  .scenario-options.segmented-control button > strong {
    font-size: 14px;
  }
}

@media (min-width: 901px) {
  .scenario-card.is-collapsed .scenario-card-heading {
    min-height: 64px;
    padding: 8px 10px 8px 14px;
  }

  .scenario-card.is-collapsed .scenario-card-heading h1 {
    font-size: 16px;
  }

  .input-panel.is-collapsed,
  .results-panel.is-collapsed {
    height: 56px;
  }

  .input-panel.is-collapsed .input-panel-body,
  .input-panel.is-collapsed .input-panel-body[hidden],
  .results-panel.is-collapsed .results-panel-body,
  .results-panel.is-collapsed .results-panel-body[hidden] {
    display: none;
    max-height: 0;
  }

  .input-panel.is-collapsed .panel-heading,
  .results-panel.is-collapsed .panel-heading {
    width: 54px;
    min-height: 54px;
    height: 54px;
    justify-content: center;
    padding: 5px;
    border-bottom: 0;
  }

  .input-panel.is-collapsed .panel-title,
  .results-panel.is-collapsed .panel-title {
    display: none;
  }

  .input-panel.is-collapsed .panel-actions,
  .results-panel.is-collapsed .panel-actions {
    display: flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
  }

  .input-panel.is-collapsed .panel-toggle,
  .results-panel.is-collapsed .panel-toggle {
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
    padding: 0;
  }
}

[hidden] {
  display: none !important;
}

.scenario-options button:disabled,
.scenario-options button:disabled:hover,
.scenario-options button:disabled:focus {
  cursor: not-allowed;
  color: #737980;
  background: #dfe2e5;
  border-color: #b9c0c6;
  box-shadow: none;
}

html[data-theme="dark"] .scenario-options button:disabled,
html[data-theme="dark"] .scenario-options button:disabled:hover,
html[data-theme="dark"] .scenario-options button:disabled:focus {
  color: #a9afb5;
  background: #30353a;
  border-color: #565d64;
}

/* Three.js replaces only the scene renderer. The formal workspace cards,
   controls, arrows, state handling, and calculation results keep their
   existing template, stylesheet, and script implementations. */
.three-scene {
  position: absolute;
  z-index: 1;
  inset: 0;
}

.three-scene canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

.three-scene canvas:active {
  cursor: grabbing;
}

.geometry-label {
  position: absolute;
  z-index: 4;
  padding: 5px 8px;
  color: var(--aantc-blue);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(0, 51, 102, 0.28);
  border-radius: 3px;
  font-size: 12px;
  font-weight: 700;
  pointer-events: none;
  transform: translate(10px, -50%);
}

.scene-fallback {
  position: absolute;
  z-index: 5;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: #edf0f2;
  text-align: center;
}

.scene-fallback[hidden] {
  display: none;
}

.scene-fallback span {
  max-width: 460px;
  color: var(--aantc-text-muted);
}

html[data-theme="dark"] .geometry-label {
  color: var(--aantc-white);
  background: rgba(21, 21, 21, 0.92);
  border-color: rgba(255, 255, 255, 0.34);
}

html[data-theme="dark"] .scene-fallback {
  color: var(--aantc-white);
  background: #101214;
}