:root {
  --ink: #12211d;
  --ink-soft: #344640;
  --paper: #f1f2eb;
  --paper-deep: #e3e6dc;
  --white: #fbfcf8;
  --forest: #10231f;
  --forest-2: #17342d;
  --green: #66d19e;
  --green-dark: #287b59;
  --amber: #f4b95f;
  --orange: #e8774d;
  --blue: #70a9de;
  --line: rgba(18, 33, 29, 0.16);
  --line-dark: rgba(255, 255, 255, 0.14);
  --muted: #6a7772;
  --muted-light: #a9b7b1;
  --shadow: 0 24px 70px rgba(24, 38, 32, 0.12);
  --radius-sm: 0.55rem;
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --max: 1440px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 1000;
  padding: 0.7rem 1rem;
  color: var(--forest);
  background: var(--amber);
  border-radius: var(--radius-sm);
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.site-header {
  position: relative;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 3rem), var(--max));
  min-height: 5.25rem;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 0.75rem;
  align-items: center;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  grid-template-columns: repeat(3, 0.33rem);
  gap: 0.18rem;
  align-items: end;
  width: 1.38rem;
  height: 1.25rem;
}

.brand-mark span {
  display: block;
  background: var(--forest);
  border-radius: 1px;
}

.brand-mark span:nth-child(1) { height: 45%; }
.brand-mark span:nth-child(2) { height: 100%; background: var(--orange); }
.brand-mark span:nth-child(3) { height: 68%; }

.site-header nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: center;
}

.site-header nav a {
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--green-dark);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: center;
  width: min(calc(100% - 3rem), 1280px);
  min-height: calc(100vh - 5.25rem);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 8rem) 0 8rem;
}

.hero::before {
  position: absolute;
  top: 9%;
  right: -4vw;
  width: clamp(18rem, 37vw, 36rem);
  height: clamp(18rem, 37vw, 36rem);
  content: "";
  border: 1px solid rgba(40, 123, 89, 0.18);
  border-radius: 50%;
  box-shadow:
    0 0 0 4rem rgba(40, 123, 89, 0.035),
    0 0 0 8rem rgba(40, 123, 89, 0.02);
  pointer-events: none;
}

.hero__copy,
.hero__instrument {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker,
.readout-label {
  margin: 0 0 1rem;
  color: var(--green-dark);
  font-family: var(--mono);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow--light {
  color: var(--green);
}

.hero h1 {
  max-width: 850px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(4rem, 9vw, 8.5rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.82;
}

.hero h1 em {
  color: var(--orange);
  font-weight: 400;
}

.hero__lede {
  max-width: 710px;
  margin: 2.35rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.15rem, 2vw, 1.42rem);
  line-height: 1.55;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  margin-top: 2.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.8rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.035em;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.button--primary {
  color: var(--white);
  background: var(--forest);
  box-shadow: 0 10px 28px rgba(16, 35, 31, 0.18);
}

.button--primary:hover {
  background: var(--forest-2);
}

.button--light {
  color: var(--forest);
  background: var(--white);
}

.text-link {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  text-underline-offset: 0.35rem;
}

.text-link span {
  display: inline-block;
  margin-left: 0.35rem;
  transition: transform 160ms ease;
}

.text-link:hover span {
  transform: translateX(0.3rem);
}

.text-link--large {
  display: inline-block;
  margin-top: 2.5rem;
  font-size: 1rem;
}

.hero__instrument {
  padding: clamp(1.8rem, 4vw, 3rem);
  color: var(--white);
  background: var(--forest);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transform: rotate(1.25deg);
}

.instrument__header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  color: var(--muted-light);
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.live-dot::before {
  display: inline-block;
  width: 0.48rem;
  height: 0.48rem;
  margin-right: 0.4rem;
  content: "";
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 0.25rem rgba(102, 209, 158, 0.12);
}

.instrument__number {
  margin: 0;
  color: var(--green);
  font-family: var(--mono);
  font-size: clamp(3.2rem, 6vw, 5.6rem);
  font-weight: 500;
  letter-spacing: -0.08em;
  line-height: 1;
}

.instrument__number--flat {
  color: var(--amber);
}

.instrument__label {
  margin: 0.4rem 0 0;
  color: var(--muted-light);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.instrument__rule {
  height: 1px;
  margin: 2rem 0;
  background: var(--line-dark);
}

.instrument__question {
  margin: 2.5rem 0 0;
  padding-top: 1.4rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.22);
  font-family: var(--serif);
  font-size: 1.35rem;
  font-style: italic;
}

.hero__disclaimer {
  position: absolute;
  bottom: 1.5rem;
  left: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 38rem);
  gap: 1rem;
  align-items: start;
  color: var(--muted);
  font-size: 0.78rem;
}

.hero__disclaimer span {
  font-family: var(--mono);
}

.hero__disclaimer p {
  margin: 0;
}

.lab-shell {
  padding: clamp(4rem, 8vw, 7rem) max(1.5rem, calc((100vw - var(--max)) / 2));
  color: var(--white);
  background: var(--forest);
}

.lab-header {
  display: flex;
  gap: 3rem;
  align-items: end;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto 2.5rem;
}

.lab-header h2,
.argument-section h2,
.prose-header h1,
.not-found h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 5vw, 5.1rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.lab-header > div > p:last-child {
  max-width: 700px;
  margin: 1.3rem 0 0;
  color: var(--muted-light);
  font-size: 1.05rem;
}

.lab-header__actions {
  display: flex;
  flex: none;
  gap: 1rem;
  align-items: center;
}

.help-button {
  display: inline-flex;
  gap: 0.55rem;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.6rem 0.9rem;
  color: var(--forest);
  background: var(--green);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.74rem;
  font-weight: 800;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.16);
}

.help-button span {
  display: grid;
  place-items: center;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--green);
  background: var(--forest);
  border-radius: 50%;
  font-family: var(--mono);
}

.quiet-button {
  padding: 0.55rem 0;
  color: var(--muted-light);
  background: transparent;
  border: 0;
  border-bottom: 1px solid currentColor;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 700;
}

.mode-bar {
  display: flex;
  gap: 2rem;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
}

.mode-bar__copy .section-kicker {
  margin-bottom: 0.25rem;
  color: var(--green);
}

.mode-bar__copy h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
}

.mode-bar__copy > p:last-child {
  margin: 0.25rem 0 0;
  color: var(--muted-light);
  font-size: 0.68rem;
}

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex: none;
  gap: 0.35rem;
  padding: 0.3rem;
  background: rgba(0, 0, 0, 0.22);
  border-radius: 999px;
}

.mode-toggle button {
  min-width: 8rem;
  padding: 0.55rem 0.85rem;
  color: var(--muted-light);
  text-align: left;
  background: transparent;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.mode-toggle button[aria-pressed="true"] {
  color: var(--forest);
  background: var(--green);
}

.mode-toggle strong,
.mode-toggle span {
  display: block;
}

.mode-toggle strong {
  font-size: 0.75rem;
}

.mode-toggle span {
  margin-top: 0.05rem;
  font-size: 0.55rem;
}

.scenario-picker {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: var(--max);
  margin: 0 auto 1rem;
}

.scenario-tab {
  min-height: 7.2rem;
  padding: 1rem;
  color: var(--muted-light);
  text-align: left;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 160ms ease, border 160ms ease, transform 160ms ease;
}

.scenario-tab:hover,
.scenario-tab[aria-pressed="true"] {
  color: var(--white);
  background: rgba(102, 209, 158, 0.08);
  border-color: rgba(102, 209, 158, 0.55);
  transform: translateY(-2px);
}

.scenario-tab__name,
.scenario-tab__prompt {
  display: block;
}

.scenario-tab__name {
  margin-bottom: 0.5rem;
  font-size: 0.82rem;
  font-weight: 800;
}

.scenario-tab__prompt {
  font-size: 0.72rem;
  line-height: 1.45;
}

.lab-console {
  max-width: var(--max);
  margin: 0 auto;
  overflow: hidden;
  color: var(--ink);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 35px 100px rgba(0, 0, 0, 0.28);
}

.console-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(8rem, auto)) 1fr;
  gap: 1px;
  color: var(--white);
  background: #29453d;
  border-bottom: 1px solid var(--line-dark);
}

.console-strip > * {
  margin: 0;
  padding: 1rem 1.25rem;
  background: var(--forest-2);
}

.console-strip div span,
.console-strip div strong {
  display: block;
}

.console-strip div span {
  color: var(--muted-light);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.console-strip div strong {
  margin-top: 0.25rem;
  color: var(--green);
  font-family: var(--mono);
  font-size: 1rem;
}

.console-strip > p {
  display: flex;
  align-items: center;
  color: #c7d2ce;
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
}

.diagnosis-panel,
.pipeline-panel,
.investment-panel,
.history-panel {
  padding: clamp(2rem, 5vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: flex;
  gap: 2rem;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-heading h3,
.prediction-panel h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.section-heading > p {
  max-width: 480px;
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.section-kicker {
  margin-bottom: 0.65rem;
  font-size: 0.65rem;
}

.diagnosis-readout {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 1px;
  overflow: hidden;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.diagnosis-readout > * {
  margin: 0;
  padding: 1.5rem;
  background: #f6f7f2;
}

.readout-label {
  margin: 0 0 0.45rem;
  font-size: 0.59rem;
}

.diagnosis-stage {
  margin: 0;
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 600;
}

.confidence {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.confidence__meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.confidence__meta strong {
  color: var(--ink);
  font-family: var(--mono);
}

.confidence__track {
  height: 0.55rem;
  margin-top: 0.7rem;
  overflow: hidden;
  background: var(--paper-deep);
  border-radius: 999px;
}

.confidence__track span {
  display: block;
  height: 100%;
  background: var(--orange);
  border-radius: inherit;
  transition: width 280ms ease;
}

.diagnosis-missing {
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.diagnosis-missing span {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.59rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.hint-controls {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: stretch;
  margin-top: 0.85rem;
}

.hint-button {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  min-width: 11.5rem;
  padding: 0.8rem 1rem;
  color: var(--green-dark);
  background: #e7f5ed;
  border: 1px solid rgba(40, 123, 89, 0.35);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 800;
  text-align: left;
}

.hint-button:hover:not(:disabled) {
  background: #dcefe5;
  border-color: var(--green-dark);
}

.hint-button:disabled {
  cursor: default;
  opacity: 0.72;
}

.hint-button span {
  font-family: var(--mono);
  font-size: 1rem;
}

.hint-card {
  padding: 0.85rem 1rem;
  background: #fff7e9;
  border: 1px solid rgba(244, 185, 95, 0.7);
  border-radius: var(--radius-sm);
}

.hint-card > span {
  display: block;
  color: #8f5a0c;
  font-family: var(--mono);
  font-size: 0.57rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hint-card p {
  margin: 0.35rem 0 0;
  color: #5f4b2c;
  font-size: 0.76rem;
  line-height: 1.45;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.3rem;
  color: var(--muted);
  font-size: 0.7rem;
}

.legend span {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
}

.legend i {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
}

.legend-signal { background: var(--amber); }
.legend-constraint { background: var(--orange); }

.pipeline {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.pipeline-stage {
  position: relative;
  min-width: 0;
}

.pipeline-arrow {
  position: absolute;
  z-index: 3;
  top: 50%;
  right: -0.62rem;
  display: grid;
  place-items: center;
  width: 1rem;
  height: 1rem;
  color: var(--muted);
  background: var(--white);
  font-family: var(--mono);
  font-size: 0.7rem;
  transform: translateY(-50%);
}

.stage-card {
  min-height: 16.8rem;
  padding: 1rem;
  background: #f5f6f1;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: border 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.stage-card.is-perceived {
  border-color: var(--amber);
  box-shadow: inset 0 3px 0 var(--amber);
}

.stage-card.is-actual {
  border-color: var(--orange);
  box-shadow: inset 0 -3px 0 var(--orange);
  transform: translateY(-0.25rem);
}

.stage-card__topline {
  display: flex;
  min-height: 1.4rem;
  justify-content: space-between;
  gap: 0.3rem;
}

.stage-number {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
}

.stage-flags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: end;
}

.flag {
  padding: 0.18rem 0.35rem;
  color: var(--ink);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.49rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.flag--perceived { background: var(--amber); }
.flag--actual { color: var(--white); background: var(--orange); }

.stage-card h3 {
  min-height: 3.3rem;
  margin: 1.1rem 0 0;
  font-family: var(--serif);
  font-size: 1.23rem;
  font-weight: 600;
  line-height: 1.05;
}

.stage-card > p {
  min-height: 2.7rem;
  margin: 0.5rem 0 1.2rem;
  color: var(--muted);
  font-size: 0.67rem;
  line-height: 1.4;
}

.queue-bar {
  height: 0.42rem;
  overflow: hidden;
  background: var(--paper-deep);
  border-radius: 999px;
}

.queue-bar span {
  display: block;
  height: 100%;
  background: var(--green-dark);
  border-radius: inherit;
  transition: width 260ms ease;
}

.stage-stats {
  display: grid;
  gap: 0.38rem;
  margin: 1rem 0 0;
}

.stage-stats div {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.36rem;
  border-top: 1px solid var(--line);
}

.stage-stats dt,
.stage-stats dd {
  margin: 0;
  font-size: 0.59rem;
}

.stage-stats dt { color: var(--muted); }
.stage-stats dd { font-family: var(--mono); font-weight: 700; }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: 1rem 0 0;
}

.metric-card {
  padding: 1rem;
  background: var(--paper);
  border-radius: var(--radius-sm);
}

.metric-card--accent {
  color: var(--white);
  background: var(--green-dark);
}

.metric-card dt {
  min-height: 2rem;
  color: var(--muted);
  font-size: 0.65rem;
}

.metric-card--accent dt,
.metric-card--accent span {
  color: #cce8dc;
}

.metric-card dd {
  margin: 0.6rem 0 0;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.06em;
}

.metric-card span {
  color: var(--muted);
  font-size: 0.61rem;
}

.investment-panel {
  background: #f6f7f2;
}

.investment-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.investment-card {
  display: grid;
  gap: 0.65rem;
  min-height: 9.5rem;
  padding: 1.15rem;
  color: var(--ink);
  text-align: left;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.investment-card:hover:not(:disabled) {
  border-color: rgba(40, 123, 89, 0.55);
  transform: translateY(-2px);
}

.investment-card.is-selected {
  background: #e7f5ed;
  border-color: var(--green-dark);
  box-shadow: inset 4px 0 0 var(--green-dark);
}

.guidance-cue {
  display: block;
  width: fit-content;
  padding: 0.28rem 0.5rem;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.56rem;
  font-weight: 800;
  line-height: 1.3;
}

.guidance-cue--helpful {
  color: #216746;
  background: #d8f0e3;
}

.guidance-cue--harmful {
  color: #963b27;
  background: #f9ded6;
}

.guidance-cue--learning {
  color: #2d5f89;
  background: #deebf7;
}

.guidance-cue--neutral {
  color: #53605b;
  background: #e8ece7;
}

[data-difficulty="easy"] .investment-card.is-impact-helpful:hover:not(:disabled),
[data-difficulty="easy"] .investment-card.is-impact-helpful:focus-visible,
[data-difficulty="easy"] .investment-card.is-impact-helpful.is-selected {
  background: #e7f5ed;
  border-color: var(--green-dark);
  box-shadow: inset 4px 0 0 var(--green-dark);
}

[data-difficulty="easy"] .investment-card.is-impact-harmful:hover:not(:disabled),
[data-difficulty="easy"] .investment-card.is-impact-harmful:focus-visible,
[data-difficulty="easy"] .investment-card.is-impact-harmful.is-selected {
  background: #fbeae5;
  border-color: #c95e41;
  box-shadow: inset 4px 0 0 #c95e41;
}

[data-difficulty="easy"] .investment-card.is-impact-learning:hover:not(:disabled),
[data-difficulty="easy"] .investment-card.is-impact-learning:focus-visible,
[data-difficulty="easy"] .investment-card.is-impact-learning.is-selected {
  background: #e9f1f8;
  border-color: #4c7fa8;
  box-shadow: inset 4px 0 0 #4c7fa8;
}

[data-difficulty="easy"] .investment-card.is-impact-neutral:hover:not(:disabled),
[data-difficulty="easy"] .investment-card.is-impact-neutral:focus-visible,
[data-difficulty="easy"] .investment-card.is-impact-neutral.is-selected {
  background: #eef0eb;
  border-color: #78847e;
  box-shadow: inset 4px 0 0 #78847e;
}

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

.investment-card__topline {
  display: flex;
  gap: 1rem;
  align-items: start;
  justify-content: space-between;
}

.investment-card__topline strong {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.08;
}

.investment-card__topline > span {
  flex: none;
  padding: 0.25rem 0.48rem;
  color: var(--green-dark);
  background: #dfede6;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 800;
}

.investment-card__mechanism,
.investment-card__risk {
  font-size: 0.7rem;
  line-height: 1.45;
}

.investment-card__mechanism { color: var(--ink-soft); }
.investment-card__risk { color: var(--muted); }

.prediction-panel {
  display: grid;
  grid-template-columns: minmax(16rem, 0.7fr) minmax(20rem, 1.3fr) auto;
  gap: 2rem;
  align-items: center;
  padding: clamp(2rem, 5vw, 4.5rem);
  background: #e9ebe3;
  border-bottom: 1px solid var(--line);
}

.prediction-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.prediction-chip {
  padding: 0.58rem 0.75rem;
  color: var(--ink-soft);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.68rem;
  font-weight: 700;
}

.prediction-chip:hover:not(:disabled),
.prediction-chip[aria-pressed="true"] {
  color: var(--white);
  background: var(--forest);
  border-color: var(--forest);
}

.prediction-chip:disabled {
  opacity: 0.5;
}

.button--run {
  min-width: 9.5rem;
  color: var(--forest);
  background: var(--amber);
  box-shadow: 0 8px 24px rgba(187, 121, 24, 0.18);
}

.button--run:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.form-notice {
  grid-column: 2 / -1;
  margin: -1.25rem 0 0;
  color: #9b3c28;
  font-size: 0.72rem;
  font-weight: 700;
}

.receipt {
  margin: clamp(2rem, 5vw, 4.5rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--white);
  background: var(--forest-2);
  border: 1px solid rgba(102, 209, 158, 0.4);
  border-radius: var(--radius);
  box-shadow: 0 18px 42px rgba(16, 35, 31, 0.18);
}

.receipt__stamp {
  display: inline-block;
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.6rem;
  color: var(--green);
  border: 1px solid rgba(102, 209, 158, 0.5);
  border-radius: 0.25rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.receipt__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.receipt__grid span,
.debrief__facts span {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--muted-light);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.receipt__grid strong {
  font-family: var(--serif);
  font-size: 1.15rem;
}

.receipt__result {
  margin: 1.6rem 0 0;
  padding-top: 1.3rem;
  color: var(--amber);
  border-top: 1px solid var(--line-dark);
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.receipt__result.is-correct {
  color: var(--green);
}

.receipt__interpretation {
  max-width: 850px;
  margin: 0.7rem 0 0;
  color: #c5d1cc;
  font-size: 0.82rem;
}

.history-chart {
  display: grid;
  gap: 0.65rem;
  padding: 1.3rem;
  background: #f5f6f1;
  border-radius: var(--radius);
}

.history-row {
  display: grid;
  grid-template-columns: 5rem minmax(8rem, 1fr) 3.5rem 7rem;
  gap: 0.8rem;
  align-items: center;
  font-size: 0.7rem;
}

.history-row__label,
.history-row__constraint {
  color: var(--muted);
}

.history-row__constraint {
  text-align: right;
}

.history-row__bar {
  height: 0.65rem;
  overflow: hidden;
  background: var(--paper-deep);
  border-radius: 999px;
}

.history-row__bar span {
  display: block;
  height: 100%;
  background: var(--green-dark);
  border-radius: inherit;
  transition: width 260ms ease;
}

.history-row strong {
  font-family: var(--mono);
  text-align: right;
}

.empty-state {
  margin: 0;
  padding: 1.5rem;
  color: var(--muted);
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
}

.debrief {
  padding: clamp(2.5rem, 6vw, 5.5rem);
  color: var(--white);
  background: var(--green-dark);
}

.debrief__header {
  display: flex;
  gap: 2rem;
  justify-content: space-between;
  align-items: end;
}

.debrief h2 {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5vw, 4.8rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 0.95;
}

.debrief__score {
  flex: none;
  font-family: var(--mono);
  font-size: clamp(2.3rem, 5vw, 4rem);
  letter-spacing: -0.07em;
}

.debrief__score small {
  display: block;
  color: #c5e5d7;
  font-size: 0.62rem;
  letter-spacing: 0;
  text-align: right;
}

.debrief__path {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  margin: 2.5rem 0;
  padding: 1.2rem;
  background: rgba(16, 35, 31, 0.24);
  border-radius: var(--radius-sm);
}

.debrief__path span {
  padding: 0.45rem 0.65rem;
  color: var(--forest);
  background: var(--green);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 800;
}

.debrief__path b {
  color: #c5e5d7;
  font-family: var(--mono);
}

.debrief__facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
}

.debrief__facts > div {
  padding: 1.2rem;
  background: rgba(16, 35, 31, 0.18);
}

.debrief__facts strong {
  font-family: var(--mono);
  font-size: 1.15rem;
}

.debrief__claim {
  max-width: 920px;
  margin: 2.5rem 0;
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3vw, 2.25rem);
  line-height: 1.3;
}

body.drawer-open {
  overflow: hidden;
}

.drawer-layer {
  position: fixed;
  z-index: 500;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr minmax(20rem, 36rem);
  pointer-events: none;
}

.drawer-layer.is-open {
  pointer-events: auto;
}

.drawer-scrim {
  grid-column: 1 / -1;
  grid-row: 1;
  padding: 0;
  background: rgba(6, 16, 13, 0.66);
  border: 0;
  cursor: pointer;
  opacity: 0;
  backdrop-filter: blur(3px);
  transition: opacity 180ms ease;
}

.drawer-layer.is-open .drawer-scrim {
  opacity: 1;
}

.help-drawer {
  position: relative;
  z-index: 1;
  grid-column: 2;
  grid-row: 1;
  height: 100%;
  padding: clamp(1.5rem, 4vw, 3rem);
  overflow-y: auto;
  color: var(--ink);
  background: var(--paper);
  box-shadow: -30px 0 80px rgba(0, 0, 0, 0.24);
  transform: translateX(105%);
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.drawer-layer.is-open .help-drawer {
  transform: translateX(0);
}

.help-drawer__header {
  display: flex;
  gap: 2rem;
  align-items: start;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.help-drawer__header .eyebrow {
  margin-bottom: 0.55rem;
}

.help-drawer h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 6vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.drawer-close {
  display: grid;
  flex: none;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
}

.help-drawer__goal {
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  color: var(--ink-soft);
  background: var(--white);
  border-left: 4px solid var(--orange);
  font-size: 0.86rem;
}

.help-drawer__mode {
  margin: -0.5rem 0 1.5rem;
  color: var(--muted);
  font-size: 0.73rem;
}

.help-drawer__mode strong {
  color: var(--ink);
}

.help-drawer__goal strong {
  color: var(--ink);
}

.play-steps {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.play-steps li {
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.play-steps li > span {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  color: var(--green);
  background: var(--forest);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 800;
}

.play-steps strong {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--serif);
  font-size: 1.08rem;
}

.play-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.73rem;
  line-height: 1.45;
}

.signal-definitions {
  display: grid;
  gap: 0.45rem;
  margin: 0.8rem 0 0;
}

.signal-definitions div {
  display: grid;
  grid-template-columns: 6.2rem 1fr;
  gap: 0.75rem;
  padding: 0.6rem 0.7rem;
  background: var(--white);
  border-radius: 0.35rem;
}

.signal-definitions dt,
.signal-definitions dd {
  margin: 0;
  font-size: 0.68rem;
  line-height: 1.4;
}

.signal-definitions dt {
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 800;
}

.signal-definitions dd {
  color: var(--muted);
}

.help-drawer__tip {
  margin: 1.5rem 0;
  padding: 1rem;
  color: #5f4b2c;
  background: #fff4df;
  border: 1px solid rgba(244, 185, 95, 0.6);
  border-radius: var(--radius-sm);
}

.help-drawer__tip span {
  color: #8f5a0c;
  font-family: var(--mono);
  font-size: 0.57rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.help-drawer__tip p {
  margin: 0.4rem 0 0;
  font-size: 0.76rem;
}

.drawer-start {
  width: 100%;
}

.argument-section {
  width: min(calc(100% - 3rem), 1280px);
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) 0;
}

.argument-section__intro {
  display: grid;
  grid-template-columns: 0.45fr 1fr;
  gap: 3rem;
  align-items: start;
}

.argument-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: clamp(3rem, 7vw, 6rem);
  background: var(--line);
  border: 1px solid var(--line);
}

.argument-grid article {
  min-height: 20rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  background: var(--paper);
}

.argument-grid article > span {
  color: var(--orange);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.argument-grid h3 {
  margin: 4.5rem 0 1rem;
  font-family: var(--serif);
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.argument-grid p {
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer {
  display: flex;
  gap: 2rem;
  justify-content: space-between;
  padding: 2rem max(1.5rem, calc((100vw - var(--max)) / 2));
  color: var(--muted-light);
  background: var(--forest);
  font-size: 0.72rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  text-underline-offset: 0.2rem;
}

.footer-settings {
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.cookie-consent {
  position: fixed;
  z-index: 800;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  width: min(calc(100% - 2rem), 920px);
  margin: 0 auto;
  padding: 1.4rem;
  color: var(--white);
  background: var(--forest);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
}

.cookie-consent__eyebrow {
  margin: 0 0 0.25rem;
  color: var(--green);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.cookie-consent h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: -0.025em;
}

.cookie-consent__copy > p:last-child {
  max-width: 650px;
  margin: 0.45rem 0 0;
  color: #c6d2cd;
  font-size: 0.78rem;
}

.cookie-consent a {
  color: var(--white);
  font-weight: 700;
  text-underline-offset: 0.2rem;
}

.cookie-consent__actions {
  display: flex;
  gap: 0.65rem;
}

.cookie-consent__actions .button {
  min-height: 2.8rem;
  padding: 0.65rem 1rem;
}

.cookie-consent__accept {
  color: var(--forest);
  background: var(--green);
}

.cookie-consent__decline {
  color: var(--white);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
}

.prose-shell {
  width: min(calc(100% - 3rem), 980px);
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 8rem) 0;
}

.prose-header {
  max-width: 850px;
  margin-bottom: clamp(3rem, 7vw, 6rem);
}

.prose-header .lede {
  max-width: 720px;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.prose {
  max-width: 760px;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.75;
}

.prose h2 {
  margin: 3.5rem 0 1rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.prose h3 {
  margin-top: 2rem;
  color: var(--ink);
}

.prose a {
  color: var(--green-dark);
  font-weight: 700;
  text-underline-offset: 0.25rem;
}

.prose blockquote {
  margin: 2.5rem 0;
  padding: 1.5rem 1.8rem;
  color: var(--ink);
  background: var(--white);
  border-left: 4px solid var(--orange);
  font-family: var(--serif);
  font-size: 1.45rem;
  font-style: italic;
}

.prose code {
  padding: 0.15rem 0.3rem;
  background: var(--paper-deep);
  border-radius: 0.2rem;
  font-family: var(--mono);
  font-size: 0.85em;
  overflow-wrap: anywhere;
}

.prose pre {
  overflow-x: auto;
  padding: 1.25rem;
  color: #dce8e3;
  background: var(--forest);
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

.prose pre code {
  padding: 0;
  background: transparent;
}

.not-found {
  width: min(calc(100% - 3rem), 900px);
  min-height: calc(100vh - 13rem);
  margin: 0 auto;
  padding: clamp(5rem, 12vw, 10rem) 0;
}

.not-found p:not(.eyebrow) {
  margin: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 1.2rem;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1100px) {
  .hero {
    gap: 3rem;
  }

  .pipeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .pipeline-stage:nth-child(3) .pipeline-arrow {
    display: none;
  }

  .prediction-panel {
    grid-template-columns: 1fr;
  }

  .form-notice {
    grid-column: auto;
    margin: 0;
  }
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 5rem;
  }

  .hero::before {
    top: 45%;
  }

  .hero__instrument {
    width: min(100%, 30rem);
    transform: none;
  }

  .hero__disclaimer {
    position: static;
    grid-column: 1;
    margin-top: 1rem;
  }

  .lab-header,
  .section-heading,
  .debrief__header {
    align-items: start;
    flex-direction: column;
  }

  .lab-header__actions {
    width: 100%;
    justify-content: space-between;
  }

  .mode-bar {
    align-items: start;
    flex-direction: column;
  }

  .mode-toggle {
    width: 100%;
  }

  .mode-toggle button {
    min-width: 0;
  }

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

  .console-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .console-strip > p {
    grid-column: 1 / -1;
  }

  .diagnosis-readout {
    grid-template-columns: 1fr 1fr;
  }

  .diagnosis-missing {
    grid-column: 1 / -1;
  }

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

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

  .argument-section__intro {
    grid-template-columns: 1fr;
  }

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

  .argument-grid article {
    min-height: auto;
  }

  .argument-grid h3 {
    margin-top: 2.5rem;
  }
}

@media (max-width: 620px) {
  .site-header {
    width: min(calc(100% - 2rem), var(--max));
  }

  .site-header nav a:first-child {
    display: none;
  }

  .hero,
  .argument-section,
  .prose-shell,
  .not-found {
    width: min(calc(100% - 2rem), 1280px);
  }

  .hero h1 {
    font-size: clamp(3.6rem, 19vw, 5.5rem);
  }

  .lab-shell {
    padding-right: 0.75rem;
    padding-left: 0.75rem;
  }

  .scenario-picker {
    grid-template-columns: 1fr;
  }

  .mode-bar {
    padding: 0.8rem;
  }

  .mode-toggle button {
    padding-inline: 0.65rem;
  }

  .scenario-tab {
    min-height: auto;
  }

  .console-strip {
    grid-template-columns: 1fr 1fr;
  }

  .console-strip > div:nth-child(3) {
    grid-column: 1 / -1;
  }

  .diagnosis-panel,
  .pipeline-panel,
  .investment-panel,
  .prediction-panel,
  .history-panel {
    padding: 1.5rem 1rem;
  }

  .diagnosis-readout,
  .pipeline,
  .metric-grid,
  .investment-grid,
  .receipt__grid,
  .debrief__facts {
    grid-template-columns: 1fr;
  }

  .hint-controls {
    grid-template-columns: 1fr;
  }

  .hint-button {
    min-width: 0;
  }

  .diagnosis-missing {
    grid-column: auto;
  }

  .stage-card {
    min-height: auto;
  }

  .stage-card h3,
  .stage-card > p {
    min-height: auto;
  }

  .pipeline-arrow {
    top: auto;
    right: 50%;
    bottom: -0.8rem;
    transform: translateX(50%) rotate(90deg);
  }

  .pipeline-stage:nth-child(3) .pipeline-arrow {
    display: grid;
  }

  .metric-card dt {
    min-height: auto;
  }

  .receipt {
    margin: 1rem;
    padding: 1.25rem;
  }

  .history-row {
    grid-template-columns: 4rem minmax(5rem, 1fr) 2.5rem;
  }

  .history-row__constraint {
    display: none;
  }

  .debrief {
    padding: 2rem 1.2rem;
  }

  .debrief__score small {
    text-align: left;
  }

  .site-footer {
    flex-direction: column;
    gap: 0.7rem;
  }

  .cookie-consent {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .cookie-consent__actions .button {
    flex: 1;
  }

  .drawer-layer {
    grid-template-columns: 1fr;
  }

  .help-drawer {
    grid-column: 1;
    padding: 1.25rem;
  }

  .signal-definitions div {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}