:root {
  --week-bg: #090a0b;
  --week-panel: #111315;
  --week-panel-2: #171a17;
  --week-text: #f2f4ed;
  --week-muted: #a3a99f;
  --week-line: #2a2e2a;
  --week-accent: #d1ff00;
  --week-paper: #e9ebe4;
  --week-danger: #ff8178;
  --week-amber: #ffc857;
  --week-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

.week-lesson {
  background: var(--week-bg);
}

.week-lesson .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.week-lesson .hero {
  position: relative;
}

.week-route {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.week-route span {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  color: var(--week-muted);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
  font-size: 0.78rem;
  font-weight: 850;
}

.week-route .is-current {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.root-lock {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 110px minmax(0, 1fr);
  align-items: center;
  gap: 22px;
  padding: clamp(26px, 5vw, 48px);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.root-lock-branches {
  display: grid;
  gap: 8px;
}

.root-lock-branches span {
  min-height: 46px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  color: #777e75;
  background: #0d0f0e;
  border: 1px solid #222622;
  font-size: 0.86rem;
  font-weight: 800;
}

.root-lock-trunk {
  position: relative;
  min-height: 300px;
  display: grid;
  place-items: center;
}

.root-lock-trunk::before {
  position: absolute;
  inset: 0 auto;
  width: 4px;
  content: "";
  background: var(--week-accent);
}

.root-lock-trunk strong {
  z-index: 1;
  padding: 13px 16px;
  color: #111600;
  background: var(--week-paper);
  text-align: center;
}

.root-fields {
  display: grid;
  gap: 1px;
  background: var(--week-line);
}

.root-fields article {
  min-width: 0;
  padding: 18px 20px;
  background: var(--week-panel-2);
}

.root-fields b {
  display: block;
  margin-bottom: 6px;
  color: var(--week-accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.root-fields p {
  margin: 0;
}

.goal-lab {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  gap: 26px;
}

.goal-options {
  display: grid;
  gap: 10px;
}

.goal-option {
  position: relative;
  min-height: 78px;
  display: grid;
  align-content: center;
  padding: 16px 18px;
  background: var(--week-panel);
  border: 1px solid var(--week-line);
  cursor: pointer;
}

.goal-option input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.goal-option strong,
.goal-option span {
  display: block;
}

.goal-option span {
  margin-top: 4px;
  color: var(--week-muted);
  font-size: 0.88rem;
}

.goal-option:has(input:checked) {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.goal-option:has(input:checked) span {
  color: #283000;
}

.goal-result {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(24px, 5vw, 44px);
  color: #151915;
  background: var(--week-paper);
}

.goal-result b {
  color: #526400;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.goal-result h3 {
  margin: 14px 0;
  font-size: clamp(1.6rem, 3vw, 2.45rem);
}

.goal-result p {
  margin: 0;
}

.statement-lab {
  display: grid;
  gap: 1px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.statement-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 92px;
  padding: 18px 20px;
  background: var(--week-panel);
}

.statement-row p {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 750;
}

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

.statement-actions button {
  min-width: 112px;
  min-height: 48px;
  color: var(--week-text);
  background: transparent;
  border: 1px solid var(--week-line);
  font-weight: 850;
}

.statement-actions button:hover {
  border-color: #657800;
}

.statement-actions button.is-picked {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.statement-row.is-correct {
  box-shadow: inset 4px 0 var(--week-accent);
}

.statement-row.is-wrong {
  box-shadow: inset 4px 0 var(--week-danger);
}

.lab-summary {
  margin-top: 18px;
  padding: 18px 20px;
  background: var(--week-panel);
  border-left: 4px solid var(--week-accent);
}

.lab-summary[hidden] {
  display: none;
}

.root-builder {
  display: grid;
  gap: 1px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.builder-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  background: var(--week-panel);
}

.builder-row > strong {
  color: var(--week-accent);
}

.builder-content p {
  margin: 0;
}

.builder-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.builder-check {
  position: relative;
  min-height: 54px;
  display: flex;
  align-items: center;
  padding: 10px 14px 10px 44px;
  background: var(--week-panel-2);
  border: 1px solid var(--week-line);
}

.builder-check input {
  position: absolute;
  left: 14px;
  width: 20px;
  height: 20px;
  accent-color: var(--week-accent);
}

.builder-select {
  min-height: 52px;
  width: 100%;
  padding: 0 14px;
  color: var(--week-text);
  background: var(--week-panel-2);
  border: 1px solid var(--week-line);
}

.root-output {
  margin-top: 20px;
  padding: clamp(24px, 5vw, 42px);
  color: #151915;
  background: var(--week-paper);
}

.root-output[hidden] {
  display: none;
}

.root-output h3 {
  margin-top: 0;
}

.root-output dl {
  display: grid;
  grid-template-columns: 160px 1fr;
  margin: 0;
}

.root-output dt,
.root-output dd {
  padding: 11px 0;
  border-bottom: 1px solid #c9cdc4;
}

.root-output dt {
  font-weight: 850;
}

.root-output dd {
  margin: 0;
}

.transfer-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 24px;
  align-items: stretch;
}

.transfer-case,
.transfer-question {
  padding: clamp(24px, 5vw, 40px);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.transfer-case b {
  color: var(--week-accent);
}

.transfer-question .choices {
  display: grid;
  gap: 8px;
}

.transfer-choice {
  position: relative;
  min-height: 54px;
  display: flex;
  align-items: center;
  padding: 10px 14px 10px 44px;
  background: var(--week-panel-2);
  border: 1px solid var(--week-line);
}

.transfer-choice input {
  position: absolute;
  left: 14px;
  width: 20px;
  height: 20px;
  accent-color: var(--week-accent);
}

.branch-highlight {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 6px;
}

.branch-highlight span {
  min-height: 66px;
  display: grid;
  place-items: center;
  padding: 8px;
  color: #747a72;
  background: #0d0f0e;
  border: 1px solid #202420;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 850;
}

.branch-highlight .is-active {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.demand-lab {
  display: grid;
  grid-template-columns: minmax(260px, 0.55fr) minmax(0, 1.45fr);
  gap: 28px;
  align-items: start;
}

.demand-controls {
  position: sticky;
  top: 20px;
  padding: 24px;
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.control-group + .control-group {
  margin-top: 24px;
}

.control-group > strong {
  display: block;
  margin-bottom: 12px;
  color: var(--week-accent);
}

.load-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.load-options button {
  min-height: 50px;
  color: var(--week-text);
  background: transparent;
  border: 1px solid var(--week-line);
  font-weight: 900;
}

.load-options button[aria-pressed="true"] {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.rep-control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

.rep-control label {
  grid-column: 1 / -1;
}

.rep-control input {
  width: 100%;
  accent-color: var(--week-accent);
}

.rep-value {
  min-width: 48px;
  color: var(--week-accent);
  font-size: 1.4rem;
  font-weight: 900;
  text-align: right;
}

.current-reading {
  margin-top: 24px;
  padding: 20px;
  color: #151915;
  background: var(--week-paper);
}

.current-reading b,
.current-reading strong {
  display: block;
}

.current-reading b {
  color: #526400;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.current-reading strong {
  margin: 8px 0;
  font-size: 1.35rem;
}

.current-reading p {
  margin: 0;
}

.matrix-panel {
  min-width: 0;
}

.matrix-scroll {
  overflow-x: auto;
  padding-bottom: 10px;
}

.demand-matrix {
  min-width: 660px;
  display: grid;
  grid-template-columns: 92px repeat(8, minmax(62px, 1fr));
  gap: 4px;
}

.matrix-label {
  min-height: 48px;
  display: grid;
  place-items: center;
  color: var(--week-muted);
  background: var(--week-panel);
  font-size: 0.8rem;
  font-weight: 850;
}

.matrix-cell {
  min-height: 54px;
  color: var(--week-text);
  background: #121512;
  border: 1px solid var(--week-line);
  font-size: 0.78rem;
  font-weight: 900;
}

.matrix-cell[data-score="1"] {
  color: #e5e8df;
  background: #273020;
}

.matrix-cell[data-score="2"] {
  color: #151a12;
  background: #a6c932;
}

.matrix-cell[data-score="3"] {
  color: #111600;
  background: var(--week-accent);
}

.matrix-cell[aria-current="true"] {
  outline: 3px solid var(--week-paper);
  outline-offset: 2px;
}

.matrix-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 14px;
  color: var(--week-muted);
  font-size: 0.82rem;
}

.matrix-legend span::before {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 7px;
  content: "";
  background: var(--legend-color);
  vertical-align: -1px;
}

.pattern-signals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.pattern-signals article {
  min-width: 0;
  padding: 18px;
  background: var(--week-panel);
}

.pattern-signals b {
  color: var(--week-accent);
}

.pattern-signals p {
  margin: 8px 0 0;
  color: var(--week-muted);
}

.threshold-note {
  margin-top: 20px;
  padding: 20px 22px;
  border-left: 4px solid var(--week-accent);
  background: var(--week-panel);
}

.set-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: center;
}

.set-card {
  padding: 24px;
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.set-card b {
  color: var(--week-accent);
}

.set-card strong {
  display: block;
  margin: 14px 0 5px;
  font-size: 1.45rem;
}

.set-arrow {
  color: var(--week-accent);
  font-size: 2.3rem;
  font-weight: 900;
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--week-line);
}

.decision-grid article {
  padding: 22px;
  background: var(--week-panel);
}

.decision-grid b {
  color: var(--week-accent);
}

.decision-grid p {
  margin: 8px 0 0;
  color: var(--week-muted);
}

.model-limits {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.model-limits article {
  padding: 24px;
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.model-limits article:last-child {
  background: #17110f;
  border-color: #854d48;
}

.model-limits h3 {
  color: var(--week-accent);
}

.model-limits article:last-child h3 {
  color: var(--week-danger);
}

.geometry-lab {
  display: grid;
  grid-template-columns: minmax(250px, 0.62fr) minmax(0, 1.38fr);
  gap: 28px;
  align-items: start;
}

.geometry-controls {
  position: sticky;
  top: 20px;
  display: grid;
  gap: 8px;
}

.geometry-controls button {
  min-height: 58px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  align-items: center;
  padding: 8px 16px;
  color: var(--week-text);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
  text-align: left;
  font-weight: 850;
}

.geometry-controls button span {
  color: var(--week-accent);
  font-family: "Space Grotesk", sans-serif;
}

.geometry-controls button[aria-pressed="true"] {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.geometry-controls button[aria-pressed="true"] span {
  color: #111600;
}

.geometry-stage {
  min-width: 0;
  padding: clamp(20px, 4vw, 34px);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.geometry-figure {
  position: relative;
  min-height: 410px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #0d0f0e;
  border-bottom: 1px solid var(--week-line);
}

.geometry-figure svg {
  width: min(100%, 620px);
  height: auto;
  overflow: visible;
}

.geometry-figure .figure-line,
.geometry-figure .figure-limb,
.geometry-figure .figure-foot,
.geometry-figure .figure-load-line {
  fill: none;
  stroke: var(--week-paper);
  stroke-width: 8;
  stroke-linecap: square;
  stroke-linejoin: round;
  transition:
    transform 360ms var(--week-ease),
    opacity 220ms ease;
}

.geometry-figure .figure-joint {
  fill: var(--week-accent);
  transition: transform 360ms var(--week-ease);
}

.geometry-figure .figure-load {
  fill: var(--week-accent);
  stroke: #111600;
  stroke-width: 5;
  transition: transform 360ms var(--week-ease);
}

.geometry-figure .figure-ground {
  stroke: #575e55;
  stroke-width: 4;
}

.geometry-figure .figure-wedge {
  fill: var(--week-accent);
  opacity: 0;
  transition: opacity 220ms ease;
}

.geometry-figure[data-mode="u3"] .figure-wedge {
  opacity: 1;
}

.geometry-figure[data-mode="u3"] .figure-person {
  transform: translateY(-14px) rotate(-2deg);
  transform-origin: 320px 420px;
}

.geometry-figure[data-mode="u4"] .figure-left-side {
  transform: translateX(-34px);
}

.geometry-figure[data-mode="u4"] .figure-right-side {
  transform: translateX(34px);
}

.geometry-figure[data-mode="u5"] .figure-load,
.geometry-figure[data-mode="u5"] .figure-load-line {
  transform: translate(86px, 66px);
}

.geometry-labels {
  position: absolute;
  inset: 18px 18px auto;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.geometry-labels span {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  color: var(--week-muted);
  background: #171a17;
  border: 1px solid var(--week-line);
  font-size: 0.75rem;
  font-weight: 850;
}

.geometry-labels span.is-changed {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.geometry-reading {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 20px;
  padding-top: 22px;
}

.geometry-reading b {
  color: var(--week-accent);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.geometry-reading h3 {
  margin: 8px 0 0;
  font-size: clamp(1.5rem, 3vw, 2.35rem);
}

.geometry-reading p {
  margin: 0;
  color: var(--week-muted);
}

.geometry-outcomes {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  background: var(--week-line);
}

.geometry-outcomes article {
  min-width: 0;
  padding: 16px;
  background: var(--week-panel-2);
}

.geometry-outcomes b {
  display: block;
  color: var(--week-accent);
  font-size: 0.74rem;
}

.geometry-outcomes strong {
  display: block;
  margin-top: 7px;
  font-size: 1rem;
}

.tradeoff-strip {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.tradeoff-strip article {
  min-width: 0;
  padding: 22px;
  background: var(--week-panel);
}

.tradeoff-strip article:nth-child(2) {
  background: var(--week-paper);
  color: #151915;
}

.tradeoff-strip article:last-child {
  background: #17110f;
}

.tradeoff-strip b {
  color: var(--week-accent);
}

.tradeoff-strip article:nth-child(2) b {
  color: #526400;
}

.tradeoff-strip article:last-child b {
  color: var(--week-danger);
}

.tradeoff-strip p {
  margin: 9px 0 0;
}

.role-ladder {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--week-line);
}

.role-ladder article {
  min-width: 0;
  padding: 22px;
  background: var(--week-panel);
}

.role-ladder b {
  color: var(--week-accent);
}

.role-ladder p {
  margin: 10px 0 0;
  color: var(--week-muted);
}

.geometry-card-output {
  margin-top: 22px;
  padding: clamp(24px, 5vw, 42px);
  color: #151915;
  background: var(--week-paper);
}

.geometry-card-output[hidden] {
  display: none;
}

.geometry-card-output h3 {
  margin-top: 0;
}

.geometry-card-output dl {
  display: grid;
  grid-template-columns: 150px 1fr;
  margin: 0;
}

.geometry-card-output dt,
.geometry-card-output dd {
  padding: 10px 0;
  border-bottom: 1px solid #c9cdc4;
}

.geometry-card-output dt {
  font-weight: 850;
}

.geometry-card-output dd {
  margin: 0;
}

.week-lesson button:focus-visible,
.week-lesson input:focus-visible,
.week-lesson select:focus-visible,
.week-lesson a:focus-visible {
  outline: 3px solid var(--week-accent);
  outline-offset: 3px;
}

.week-lesson .action[hidden] {
  display: none;
}

/* M4 · activity-measurement transfer */
.mobility-handoff {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  margin-top: 24px;
}

.mobility-handoff article {
  padding: clamp(24px, 4vw, 38px);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.mobility-handoff > span {
  align-self: center;
  color: var(--week-accent);
  font-size: clamp(2rem, 4vw, 4rem);
  font-weight: 900;
}

.mobility-handoff b,
.rail-code {
  color: var(--week-accent);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.mobility-handoff h3 {
  margin: 14px 0 8px;
}

.mobility-handoff p,
.mobility-thesis p {
  margin: 0;
}

.mobility-thesis {
  margin-top: 24px;
}

.dual-baseline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.dual-baseline article {
  min-height: 210px;
  padding: clamp(24px, 5vw, 42px);
  background: var(--week-panel);
}

.dual-baseline article:last-child {
  background: var(--week-panel-2);
}

.dual-baseline h3 {
  margin: 18px 0 10px;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

.dual-baseline p {
  margin: 0;
  color: var(--week-muted);
}

.condition-check,
.prediction-board,
.mobility-card-form,
.transfer-question,
[data-retest-test] {
  margin-top: 30px;
}

.week-lesson fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.week-lesson legend {
  margin-bottom: 18px;
  font-size: 1.12rem;
  font-weight: 850;
}

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

.prediction-grid label {
  position: relative;
  min-height: 150px;
  cursor: pointer;
}

.prediction-grid input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.prediction-grid label > span {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  background: var(--week-panel);
  border: 2px solid transparent;
}

.prediction-grid b,
.decision-outcomes b {
  color: var(--week-accent);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

.prediction-grid strong,
.decision-outcomes strong {
  margin-top: 10px;
  font-size: 1.25rem;
}

.prediction-grid small,
.decision-outcomes span {
  margin-top: 6px;
  color: var(--week-muted);
}

.prediction-grid label:has(input:checked) > span {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.prediction-grid label:has(input:checked) b,
.prediction-grid label:has(input:checked) small {
  color: #283000;
}

.mobility-lab[hidden] {
  display: none;
}

.mobility-lab {
  display: grid;
  grid-template-columns: minmax(190px, 0.32fr) minmax(0, 1fr);
  gap: 22px;
  margin-top: 46px;
}

.mobility-time-controls {
  display: grid;
  align-content: start;
  gap: 8px;
}

.mobility-time-controls button {
  min-height: 68px;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 10px;
  align-items: center;
  padding: 10px 16px;
  color: var(--week-text);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
  text-align: left;
  font-weight: 850;
}

.mobility-time-controls button span {
  color: var(--week-accent);
  font-size: 0.76rem;
}

.mobility-time-controls button[aria-pressed="true"] {
  color: #111600;
  background: var(--week-accent);
  border-color: var(--week-accent);
}

.mobility-time-controls button[aria-pressed="true"] span {
  color: #344000;
}

.dual-track {
  --screen-cqw: 16;
  min-width: 0;
  padding: clamp(24px, 4vw, 38px);
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.dual-track[data-time="immediate"] {
  --screen-cqw: 84;
}

.dual-track[data-time="ten"] {
  --screen-cqw: 72;
}

.dual-track[data-time="next"] {
  --screen-cqw: 22;
}

.dual-track > header {
  margin-bottom: 26px;
}

.dual-track > header h3 {
  margin: 8px 0 0;
  font-size: clamp(1.35rem, 3vw, 2.2rem);
}

.track-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.36fr) minmax(180px, 1fr) minmax(150px, 0.44fr);
  gap: 22px;
  align-items: center;
  min-height: 140px;
  border-top: 1px solid var(--week-line);
}

.track-row > div:first-child b,
.track-row > div:first-child strong,
.track-row > p strong,
.track-row > p span {
  display: block;
}

.track-row > div:first-child b {
  margin-bottom: 7px;
  color: var(--week-accent);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.track-row > p {
  margin: 0;
}

.track-row > p strong {
  color: var(--week-text);
  font-size: 1.03rem;
}

.track-row > p span {
  margin-top: 4px;
  color: var(--week-muted);
  font-size: 0.82rem;
}

.track-visual {
  position: relative;
  container-type: inline-size;
  height: 48px;
  border-bottom: 3px solid #535b52;
}

.track-visual::before,
.track-visual::after {
  position: absolute;
  bottom: -9px;
  width: 1px;
  height: 15px;
  content: "";
  background: #7b8479;
}

.track-visual::before {
  left: 16%;
}

.track-visual::after {
  right: 16%;
}

.track-visual span {
  position: absolute;
  bottom: -31px;
  color: var(--week-muted);
  font-size: 0.75rem;
}

.track-visual span:nth-of-type(1) {
  left: 16%;
  transform: translateX(-50%);
}

.track-visual span:nth-of-type(2) {
  right: 16%;
  transform: translateX(50%);
}

.track-visual i {
  position: absolute;
  z-index: 1;
  left: 0;
  bottom: -10px;
  width: 17px;
  height: 17px;
  background: var(--week-accent);
  border: 3px solid var(--week-panel);
  border-radius: 50%;
  transform: translateX(calc(var(--screen-cqw) * 1cqw - 50%));
  transition: transform 520ms var(--week-ease), opacity 180ms ease;
}

.dual-track[data-time="next"] .track-visual i {
  background: transparent;
  border-color: var(--week-muted);
  opacity: 0.6;
}

.task-signal {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.task-signal i {
  height: 12px;
  background: #6b7468;
}

.dual-track[data-time="immediate"] .task-signal i,
.dual-track[data-time="ten"] .task-signal i {
  background: #9a6a66;
}

.dual-track[data-time="next"] .task-signal i {
  background: transparent;
  border: 1px dashed #6b7468;
}

.dual-track > footer {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.dual-track > footer div {
  padding: 20px;
  background: var(--week-panel-2);
}

.dual-track > footer b {
  color: var(--week-accent);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.dual-track > footer p {
  margin: 8px 0 0;
}

.outcome-map {
  display: grid;
  grid-template-columns: 70px minmax(0, 1.1fr) minmax(280px, 0.9fr);
  grid-template-rows: auto 1fr;
  gap: 12px 22px;
}

.outcome-axis {
  color: var(--week-muted);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.06em;
}

.outcome-axis-x {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  text-align: center;
}

.outcome-axis-y {
  grid-row: 2;
  display: grid;
  grid-template-rows: repeat(2, 1fr);
  align-items: center;
  text-align: center;
  writing-mode: vertical-rl;
}

.decision-outcomes {
  grid-column: 2;
  grid-row: 2;
}

.decision-outcomes button {
  min-height: 170px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  color: var(--week-text);
  background: var(--week-panel);
  border: 0;
  text-align: left;
}

.decision-outcomes button[aria-pressed="true"] {
  color: #111600;
  background: var(--week-accent);
}

.decision-outcomes button[aria-pressed="true"] b,
.decision-outcomes button[aria-pressed="true"] span {
  color: #283000;
}

.decision-outcomes .is-authored:not([aria-pressed="true"]) {
  box-shadow: inset 0 0 0 2px var(--week-accent);
}

.outcome-reading {
  grid-column: 3;
  grid-row: 2;
  padding: clamp(24px, 4vw, 38px);
  color: #151915;
  background: var(--week-paper);
}

.outcome-reading > span {
  color: #526400;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.outcome-reading h3 {
  margin: 13px 0 22px;
  font-size: clamp(1.45rem, 3vw, 2.25rem);
}

.outcome-reading dl,
.mobility-card-output dl {
  display: grid;
  grid-template-columns: 130px 1fr;
  margin: 0;
}

.outcome-reading dt,
.outcome-reading dd,
.mobility-card-output dt,
.mobility-card-output dd {
  padding: 11px 0;
  border-bottom: 1px solid #c9cdc4;
}

.outcome-reading dt,
.mobility-card-output dt {
  font-weight: 850;
}

.outcome-reading dd,
.mobility-card-output dd {
  margin: 0;
}

.number-boundary {
  display: grid;
  grid-template-columns: minmax(270px, 0.8fr) minmax(0, 1.2fr);
  gap: 22px;
}

.number-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 390px;
  padding: clamp(28px, 5vw, 48px);
  color: #111600;
  background: var(--week-accent);
}

.number-card > span {
  margin-bottom: auto;
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.06em;
}

.number-card h3 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
}

.number-card p {
  margin: 0;
}

.number-checks {
  display: grid;
  gap: 1px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.number-checks article {
  display: grid;
  grid-template-columns: 48px minmax(120px, 0.42fr) 1fr;
  gap: 16px;
  align-items: center;
  padding: 22px;
  background: var(--week-panel);
}

.number-checks b {
  color: var(--week-accent);
}

.number-checks p {
  margin: 0;
  color: var(--week-muted);
}

.retest-rail {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.retest-rail::before {
  position: absolute;
  top: 38px;
  right: 12%;
  left: 12%;
  height: 2px;
  content: "";
  background: var(--week-accent);
}

.retest-rail article {
  position: relative;
  z-index: 1;
  min-height: 260px;
  padding: 28px;
  background: var(--week-panel);
  border: 1px solid var(--week-line);
}

.retest-rail article > b {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  margin-bottom: 52px;
  color: #111600;
  background: var(--week-accent);
  border-radius: 50%;
  font-size: 0.68rem;
}

.retest-rail article > span {
  color: var(--week-accent);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.retest-rail h3 {
  margin: 10px 0;
}

.retest-rail p {
  margin: 0;
  color: var(--week-muted);
}

.retest-rail .is-future {
  border-style: dashed;
}

.retest-rail .is-future > b {
  color: var(--week-muted);
  background: var(--week-panel);
  border: 2px solid var(--week-muted);
}

.mobility-card-form {
  display: grid;
  gap: 1px;
  background: var(--week-line);
  border: 1px solid var(--week-line);
}

.mobility-card-form > .action,
.mobility-card-form > .feedback {
  width: max-content;
  max-width: calc(100% - 40px);
  margin: 20px;
}

.mobility-card-form > .feedback {
  width: auto;
}

.mobility-card-output {
  margin-top: 24px;
  padding: clamp(26px, 5vw, 44px);
  color: #151915;
  background: var(--week-paper);
}

.mobility-card-output[hidden] {
  display: none;
}

.mobility-card-output .rail-code {
  color: #526400;
}

.mobility-card-output h3 {
  margin: 12px 0 24px;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
}

.mobility-checkpoint {
  margin-top: 28px;
}

@media (max-width: 900px) {
  .goal-lab,
  .demand-lab,
  .geometry-lab,
  .mobility-lab,
  .transfer-card {
    grid-template-columns: 1fr;
  }

  .demand-controls {
    position: static;
  }

  .geometry-controls {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mobility-time-controls {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .mobility-time-controls button {
    grid-template-columns: 1fr;
    align-content: center;
    text-align: center;
  }

  .outcome-map {
    grid-template-columns: 58px minmax(0, 1fr);
  }

  .outcome-reading {
    grid-column: 2;
    grid-row: 3;
  }

  .branch-highlight {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .root-lock {
    grid-template-columns: 1fr;
  }

  .root-lock-trunk {
    min-height: 120px;
  }

  .root-lock-trunk::before {
    inset: auto 0;
    width: auto;
    height: 4px;
  }

  .statement-row,
  .builder-row {
    grid-template-columns: 1fr;
  }

  .mobility-handoff,
  .dual-baseline,
  .number-boundary,
  .retest-rail {
    grid-template-columns: 1fr;
  }

  .mobility-handoff > span {
    transform: rotate(90deg);
    text-align: center;
  }

  .track-row {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 24px 0;
  }

  .track-visual {
    margin: 0 18px 22px;
  }

  .dual-track > footer,
  .outcome-grid {
    grid-template-columns: 1fr;
  }

  .outcome-axis-x {
    display: none;
  }

  .outcome-axis-y {
    grid-column: 1;
    grid-row: 1;
  }

  .decision-outcomes {
    grid-column: 2;
    grid-row: 1;
  }

  .outcome-reading {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .retest-rail::before {
    top: 44px;
    bottom: 44px;
    left: 38px;
    width: 2px;
    height: auto;
  }

  .retest-rail article > b {
    margin-bottom: 38px;
  }

  .statement-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .statement-actions button {
    min-width: 0;
  }

  .builder-options,
  .model-limits {
    grid-template-columns: 1fr;
  }

  .root-output dl {
    grid-template-columns: 1fr;
  }

  .outcome-reading dl,
  .mobility-card-output dl {
    grid-template-columns: 1fr;
  }

  .root-output dt {
    padding-bottom: 3px;
    border-bottom: 0;
  }

  .root-output dd {
    padding-top: 3px;
  }

  .set-compare {
    grid-template-columns: 1fr;
  }

  .set-arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .decision-grid,
  .pattern-signals,
  .tradeoff-strip {
    grid-template-columns: 1fr;
  }

  .geometry-reading,
  .geometry-card-output dl {
    grid-template-columns: 1fr;
  }

  .geometry-card-output dt {
    padding-bottom: 3px;
    border-bottom: 0;
  }

  .geometry-card-output dd {
    padding-top: 3px;
  }

  .outcome-reading dt,
  .mobility-card-output dt {
    padding-bottom: 3px;
    border-bottom: 0;
  }

  .outcome-reading dd,
  .mobility-card-output dd {
    padding-top: 3px;
  }

  .role-ladder,
  .geometry-outcomes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .branch-highlight {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .goal-result {
    min-height: 260px;
  }

  .root-lock-branches span {
    min-height: 44px;
  }

  .geometry-controls,
  .role-ladder,
  .geometry-outcomes {
    grid-template-columns: 1fr;
  }

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

  .number-checks article {
    grid-template-columns: 42px 1fr;
  }

  .number-checks p {
    grid-column: 2;
  }

  .geometry-figure {
    min-height: 330px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .set-arrow {
    transition: none;
  }

  .geometry-figure .figure-line,
  .geometry-figure .figure-limb,
  .geometry-figure .figure-foot,
  .geometry-figure .figure-load-line,
  .geometry-figure .figure-joint,
  .geometry-figure .figure-load,
  .geometry-figure .figure-wedge,
  .track-visual i {
    transition: none;
  }
}

@media print {
  .week-lesson .statement-actions,
  .week-lesson .demand-controls,
  .week-lesson .mobility-time-controls,
  .week-lesson .action,
  .week-lesson .save-status {
    display: none;
  }

  .matrix-scroll {
    overflow: visible;
  }

  .demand-matrix {
    min-width: 0;
  }
}