:root {
  --paper: #f3f0e9;
  --paper-deep: #e8e3d9;
  --surface: #fbfaf6;
  --surface-raised: #ffffff;
  --ink: #17272b;
  --ink-soft: #526064;
  --line: #cbc8be;
  --line-dark: #9da4a2;
  --petrol: #183e46;
  --petrol-light: #2e6e75;
  --rust: #c85f43;
  --rust-dark: #8f3e2b;
  --ochre: #bf8a2f;
  --sage: #66816e;
  --focus: #166b8f;
  --success-bg: #e3ede7;
  --failure-bg: #f7e3dc;
  --unknown-bg: #ece9e0;
  --shadow: 0 18px 50px rgb(38 48 49 / 9%);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
  font-family: var(--sans);
  font-synthesis: none;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(90deg, transparent calc(50% - 1px), rgb(24 62 70 / 3%) 50%, transparent calc(50% + 1px)),
    var(--paper);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="range"] {
  accent-color: var(--petrol-light);
}

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

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus), transparent 20%);
  outline-offset: 3px;
}

a {
  color: inherit;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.85rem;
  color: white;
  background: var(--petrol);
  transform: translateY(-180%);
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1440px, calc(100% - 5rem));
  margin: 0 auto;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: flex;
  gap: 0.55rem;
  align-items: baseline;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.wordmark-divider {
  color: var(--rust);
  font-weight: 400;
}

.wordmark-project {
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.site-header nav {
  display: flex;
  gap: 1.6rem;
}

.site-header nav a {
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 650;
  text-decoration: none;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.8fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: center;
  width: min(1300px, calc(100% - 5rem));
  min-height: 690px;
  margin: 0 auto;
  padding: 7rem 0 8rem;
}

.eyebrow,
.section-number,
.plot-kicker,
.control-kicker,
.paper-venue {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 1.15rem;
}

.eyebrow-mark {
  display: inline-block;
  width: 1.8rem;
  height: 2px;
  background: var(--rust);
}

.hero h1 {
  margin: 0;
  color: var(--petrol);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(4.2rem, 9vw, 8.4rem);
  font-weight: 400;
  letter-spacing: -0.075em;
  line-height: 0.92;
}

.hero h1 span {
  color: var(--rust);
}

.hero-lede {
  max-width: 42rem;
  margin: 2.2rem 0 0;
  color: #34484d;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.55;
}

.hero-actions,
.button-row,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.hero-actions {
  gap: 1.3rem;
  margin-top: 2.4rem;
}

.button,
.quiet-button,
.icon-button,
.text-button,
.formula-toggle {
  border: 0;
  cursor: pointer;
}

.button {
  display: inline-flex;
  min-height: 2.8rem;
  padding: 0.72rem 1.05rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: none;
}

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

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

.button-primary:hover:not(:disabled) {
  background: #0f3037;
}

.button-secondary {
  color: var(--petrol);
  border-color: var(--line-dark);
  background: transparent;
}

.button-secondary:hover:not(:disabled) {
  border-color: var(--petrol);
  background: rgb(24 62 70 / 5%);
}

.quiet-button,
.icon-button {
  min-height: 2.5rem;
  padding: 0.58rem 0.75rem;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 3px;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 700;
}

.quiet-button:hover,
.icon-button:hover {
  color: var(--ink);
  border-color: var(--line-dark);
  background: var(--surface);
}

.text-link,
.text-button,
.formula-toggle {
  display: inline-flex;
  width: fit-content;
  padding: 0;
  color: var(--petrol-light);
  border-bottom: 1px solid currentColor;
  background: transparent;
  font-size: 0.83rem;
  font-weight: 750;
  text-decoration: none;
}

.text-link:hover,
.text-button:hover:not(:disabled),
.formula-toggle:hover {
  color: var(--rust-dark);
}

.hero-diagram {
  position: relative;
  padding: 2.2rem 2rem 1.5rem;
  border: 1px solid var(--line);
  background: rgb(251 250 246 / 65%);
}

.hero-diagram::before,
.hero-diagram::after {
  position: absolute;
  width: 0.55rem;
  height: 0.55rem;
  border: 1px solid var(--line-dark);
  background: var(--paper);
  content: "";
}

.hero-diagram::before {
  top: -0.32rem;
  left: -0.32rem;
}

.hero-diagram::after {
  right: -0.32rem;
  bottom: -0.32rem;
}

.diagram-signal svg {
  display: block;
  overflow: visible;
  width: 100%;
}

.diagram-grid {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.diagram-line-a,
.diagram-line-b {
  fill: none;
  stroke-linecap: round;
  stroke-width: 3;
}

.diagram-line-a {
  stroke: var(--petrol-light);
}

.diagram-line-b {
  stroke: var(--rust);
}

.diagram-window {
  fill: rgb(24 62 70 / 5%);
  stroke: rgb(24 62 70 / 38%);
  stroke-dasharray: 4 4;
}

.window-two {
  fill: rgb(200 95 67 / 4%);
  stroke: rgb(200 95 67 / 42%);
}

.diagram-flow {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  justify-content: center;
  margin-top: 1.3rem;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.71rem;
}

.flow-arrow {
  color: var(--line-dark);
}

.formula-chip {
  padding: 0.25rem 0.45rem;
  color: var(--petrol);
  background: var(--paper-deep);
}

.hero-facts {
  display: flex;
  justify-content: space-between;
  margin-top: 1.8rem;
  padding-top: 1rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.experiment-section,
.method-section,
.research-section {
  padding: clamp(5rem, 8vw, 8rem) max(2.5rem, calc((100vw - 1440px) / 2));
}

.experiment-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(18rem, 1fr) minmax(20rem, 0.65fr);
  gap: 4rem;
  align-items: end;
  margin: 0 auto 3.4rem;
}

.section-heading h2 {
  max-width: 46rem;
  margin: 0.55rem 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.3rem, 4vw, 4rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1.06;
}

.section-heading > p {
  max-width: 36rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.app-shell {
  position: relative;
  max-width: 1440px;
  min-height: 38rem;
  margin: 0 auto;
  border: 1px solid var(--line-dark);
  background: var(--surface-raised);
  box-shadow: var(--shadow);
}

.loading-state,
.error-state {
  display: flex;
  min-height: 38rem;
  padding: 3rem;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
}

.loading-state {
  gap: 0.8rem;
}

.loading-mark {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--line);
  border-top-color: var(--petrol-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.error-state {
  flex-direction: column;
  text-align: center;
}

.error-state h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.7rem;
}

.experiment-toolbar {
  display: grid;
  grid-template-columns: minmax(10rem, 1.3fr) 7rem auto minmax(12rem, 1fr) auto;
  gap: 0.75rem;
  align-items: end;
  padding: 1.1rem 1.25rem 0.8rem;
  border-bottom: 1px solid var(--line);
  background: #f7f5ef;
}

.experiment-toolbar label,
.control-column label {
  display: grid;
  gap: 0.28rem;
  color: var(--ink-soft);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

select,
input[type="number"] {
  width: 100%;
  min-height: 2.5rem;
  padding: 0.45rem 2rem 0.45rem 0.6rem;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--surface-raised);
  font-size: 0.8rem;
  font-weight: 550;
}

input[type="number"] {
  padding-right: 0.4rem;
  font-family: var(--mono);
}

.toolbar-note {
  min-height: 1.1rem;
  margin: 0;
  padding: 0 1.25rem 0.75rem;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  background: #f7f5ef;
  font-size: 0.7rem;
}

.mode-tabs {
  display: flex;
  border-bottom: 1px solid var(--line-dark);
  background: var(--surface);
}

.mode-tabs button {
  position: relative;
  min-width: 7.4rem;
  padding: 0.9rem 1.1rem;
  color: var(--ink-soft);
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.mode-tabs button[aria-selected="true"] {
  color: var(--petrol);
  background: white;
}

.mode-tabs button[aria-selected="true"]::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 3px;
  background: var(--rust);
  content: "";
}

.mode-tabs button span {
  margin-left: 0.25rem;
  color: var(--rust-dark);
  font-size: 0.55rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(21rem, 0.72fr);
}

.visualization-column {
  min-width: 0;
  border-right: 1px solid var(--line-dark);
}

.plot-card {
  margin: 0;
  padding: 1.25rem 1.4rem 1rem;
  border-bottom: 1px solid var(--line);
}

.plot-card:last-child {
  border-bottom: 0;
}

.plot-heading,
.card-heading-row {
  display: flex;
  gap: 1rem;
  align-items: start;
  justify-content: space-between;
}

.plot-heading h3,
.control-column h3 {
  margin: 0.12rem 0 0;
  font-size: 0.95rem;
  font-weight: 720;
  letter-spacing: -0.01em;
}

.plot-heading h3 .math {
  font-family: Georgia, serif;
  font-style: italic;
  font-weight: 400;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  justify-content: flex-end;
  color: var(--ink-soft);
  font-size: 0.62rem;
}

.legend span {
  display: flex;
  gap: 0.3rem;
  align-items: center;
}

.legend-line {
  display: inline-block;
  width: 1rem;
  height: 2px;
  background: currentColor;
}

.clean-a { color: var(--petrol-light); }
.clean-b { color: var(--rust); }
.attacked { color: var(--ink); border-top: 1px dashed currentColor; background: transparent; }
.score-no { color: #7b8586; }
.score-transition { color: var(--ochre); }
.score-channel { color: var(--petrol-light); }

.plot-card canvas,
.margin-card canvas,
.random-result canvas {
  display: block;
  width: 100%;
}

.signal-card canvas {
  height: 275px;
  cursor: crosshair;
}

.perturbation-card canvas { height: 150px; }
.trace-card canvas { height: 275px; }
.margin-card canvas { height: 72px; }
.random-result canvas { height: 94px; }

.plot-card figcaption {
  min-height: 1.15rem;
  margin-top: 0.25rem;
  color: var(--ink-soft);
  font-size: 0.66rem;
}

.budget-readout {
  color: var(--rust-dark);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.control-column {
  min-width: 0;
  background: #faf9f5;
}

.control-column > section {
  padding: 1.25rem 1.35rem;
  border-bottom: 1px solid var(--line);
}

.property-card > p,
.control-intro,
.verify-panel > p,
.result-card > p,
.fine-print {
  margin: 0.65rem 0 0;
  color: var(--ink-soft);
  font-size: 0.75rem;
  line-height: 1.55;
}

.observed-state,
.valid-badge {
  display: inline-flex;
  padding: 0.22rem 0.45rem;
  color: #315d49;
  border: 1px solid #9ab5a5;
  border-radius: 999px;
  background: var(--success-bg);
  font-size: 0.61rem;
  font-weight: 750;
}

.observed-state.is-violated {
  color: var(--rust-dark);
  border-color: #d4a08e;
  background: var(--failure-bg);
}

.requirement-choice {
  margin-top: 0.85rem;
}

.requirement-horizon {
  margin-top: 0.7rem;
  padding: 0.6rem 0.65rem 0.35rem;
  border: 1px solid var(--line);
  background: white;
}

.requirement-horizon > span {
  display: flex;
  justify-content: space-between;
}

.property-card > h3 {
  margin-top: 0.9rem;
}

.formula-toggle {
  margin-top: 0.7rem;
}

.formula-panel {
  margin-top: 0.75rem;
  padding: 0.7rem;
  border-left: 2px solid var(--petrol-light);
  background: var(--paper);
}

.formula-panel code {
  color: var(--petrol);
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: nowrap;
}

.formula-panel p {
  margin: 0.5rem 0 0;
  color: var(--ink-soft);
  font-size: 0.66rem;
}

.margin-value {
  color: var(--petrol);
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 650;
  line-height: 1;
}

.margin-value.is-negative {
  color: var(--rust-dark);
}

.margin-card canvas {
  margin-top: 0.6rem;
}

.margin-axis {
  display: flex;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.56rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.witness-copy {
  margin: 0.65rem 0 0;
  color: var(--ink-soft);
  font-size: 0.69rem;
  line-height: 1.5;
}

.mode-panel h3 {
  margin-bottom: 0.6rem;
}

.control-grid {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.9rem;
}

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

.range-label {
  margin-top: 0.75rem;
}

.range-label > span,
.control-grid label > span {
  display: flex;
  justify-content: space-between;
}

input[type="range"] {
  width: 100%;
  min-height: 1.5rem;
}

output {
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 600;
}

.checkbox-label {
  display: flex !important;
  gap: 0.45rem !important;
  min-height: 2.5rem;
  flex-direction: row;
  align-items: center;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  background: white;
}

.button-row {
  margin-top: 0.9rem;
}

.button-row .button {
  flex: 1;
}

.full-width {
  width: 100%;
  margin-top: 0.75rem;
}

.advanced-settings {
  margin-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.advanced-settings summary {
  padding-top: 0.7rem;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 700;
}

.attack-actions .button {
  min-width: 9rem;
}

.cancel-button {
  width: 100%;
  margin-top: 0.55rem;
}

.job-progress {
  margin-top: 0.85rem;
}

.job-progress div {
  display: flex;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.65rem;
}

.job-progress progress {
  width: 100%;
  height: 0.38rem;
  border: 0;
  border-radius: 0;
  background: var(--paper-deep);
}

.job-progress progress::-webkit-progress-bar { background: var(--paper-deep); }
.job-progress progress::-webkit-progress-value { background: var(--rust); }
.job-progress progress::-moz-progress-bar { background: var(--rust); }

.random-result {
  margin-top: 0.9rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.comparison-jump {
  margin-top: 0.9rem;
}

.requirement-comparison {
  padding: 1.4rem;
  border-top: 1px solid var(--line-dark);
  background: #f7f5ef;
}

.requirement-comparison-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: end;
}

.requirement-comparison h3 {
  margin: 0.12rem 0 0;
  font-size: 1rem;
  font-weight: 720;
  letter-spacing: -0.01em;
}

.requirement-comparison-heading .control-intro {
  max-width: 48rem;
}

.requirement-comparison-heading .button {
  min-width: 14rem;
}

.requirement-comparison-results {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  margin-top: 1rem;
}

.requirement-comparison-results > .comparison-placeholder {
  grid-column: 1 / -1;
}

.requirement-comparison-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.45rem 0.8rem;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-left-width: 3px;
  background: white;
}

.requirement-identity {
  display: grid;
  min-width: 0;
  gap: 0.18rem;
}

.requirement-identity strong {
  font-size: 0.7rem;
}

.requirement-identity code {
  overflow: hidden;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.55rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.requirement-metric {
  display: grid;
  align-content: start;
  min-width: 4.5rem;
  text-align: right;
}

.requirement-metric span {
  color: var(--ink-soft);
  font-size: 0.52rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.requirement-metric output {
  font-size: 0.78rem;
}

.requirement-status {
  grid-column: 1 / -1;
  color: var(--ink-soft);
  font-size: 0.6rem;
}

.requirement-comparison-row.is-counterexample,
.requirement-comparison-row.is-clean-failure {
  border-left-color: var(--rust);
}

.requirement-comparison-row.is-not-found {
  border-left-color: var(--sage);
}

.requirement-comparison-row.is-running {
  border-left-color: var(--ochre);
}

.comparison-settings {
  min-height: 1em;
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.58rem;
}

.requirement-comparison > .fine-print {
  max-width: 72rem;
}

.random-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 0.35rem;
}

.random-stats > div {
  display: grid;
}

.random-stats > div + div {
  padding-left: 0.8rem;
  border-left: 1px solid var(--line);
}

.random-stats strong {
  font-family: var(--mono);
  font-size: 0.9rem;
}

.random-stats span {
  color: var(--ink-soft);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.comparison-results {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.comparison-placeholder {
  padding: 0.8rem;
  color: var(--ink-soft);
  border: 1px dashed var(--line-dark);
  font-size: 0.7rem;
  text-align: center;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem 0.8rem;
  padding: 0.7rem;
  border: 1px solid var(--line);
  background: white;
}

.comparison-row strong {
  font-size: 0.72rem;
}

.comparison-row output {
  grid-row: span 2;
  align-self: center;
  font-size: 0.88rem;
}

.comparison-row span {
  color: var(--ink-soft);
  font-size: 0.62rem;
}

.comparison-row.is-counterexample {
  border-left: 3px solid var(--rust);
}

.comparison-row.is-not-found {
  border-left: 3px solid var(--sage);
}

.fine-print {
  font-size: 0.66rem;
}

.planned-flow {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  margin: 0.8rem 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.59rem;
}

.planned-flow span {
  padding: 0.3rem;
  border: 1px solid var(--line);
  background: white;
}

.planned-flow i {
  font-style: normal;
}

.result-card {
  background: var(--surface-raised);
}

.result-card.is-counterexample {
  background: linear-gradient(135deg, var(--failure-bg), white 70%);
}

.result-card.is-not-found {
  background: linear-gradient(135deg, var(--success-bg), white 75%);
}

.validity-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.75rem;
  color: var(--ink-soft);
  font-size: 0.62rem;
}

.result-actions {
  justify-content: space-between;
  margin-top: 0.8rem;
}

.method-section {
  background: var(--paper);
}

.method-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  max-width: 1250px;
  margin: 0 auto;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.method-flow article {
  padding: 2rem;
}

.method-flow h3 {
  margin: 1.4rem 0 0.5rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  font-weight: 400;
}

.method-flow p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.method-index {
  color: var(--rust-dark);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.method-arrow {
  align-self: center;
  color: var(--line-dark);
}

.method-details {
  max-width: 900px;
  margin: 3rem auto 0;
}

.overlap-demo {
  display: grid;
  grid-template-columns: minmax(18rem, 0.72fr) minmax(30rem, 1.28fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  max-width: 1250px;
  margin: 3rem auto 0;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line-dark);
  background: var(--surface);
}

.overlap-copy h3 {
  max-width: 30rem;
  margin: 0.6rem 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 400;
  line-height: 1.2;
}

.overlap-copy > p:not(.section-number) {
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.overlap-status {
  min-height: 2.4rem;
  margin: 0.75rem 0 0 !important;
  padding-left: 0.7rem;
  border-left: 2px solid var(--petrol);
  color: var(--ink-soft);
  font-size: 0.57rem;
}

.overlap-instrument {
  overflow-x: auto;
  min-width: 0;
  padding: 1.3rem;
  border: 1px solid var(--line);
  background: white;
  font-family: var(--mono);
}

.toy-stage + .toy-stage {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.toy-stage-heading {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.8rem;
}

.toy-stage-heading > span {
  display: grid;
  width: 1.35rem;
  height: 1.35rem;
  place-items: center;
  color: var(--petrol);
  border: 1px solid var(--petrol);
  border-radius: 50%;
  font-size: 0.56rem;
}

.toy-stage-heading h4 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  font-weight: 400;
}

.toy-rule {
  margin: 0 0 0.75rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.55rem;
}

.separate-attacks,
.merged-scores {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
}

.separate-attacks article {
  padding: 0.8rem;
  border: 1px solid var(--line);
}

.separate-attacks article > p {
  margin: 0 0 0.5rem;
  color: var(--ink-soft);
  font-size: 0.56rem;
}

.toy-window {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 0.65rem;
}

.toy-window span,
.signal-cells span {
  padding: 0.5rem;
  border: 1px solid var(--line);
  text-align: center;
}

.toy-window span + span,
.signal-cells span + span {
  border-left: 0;
}

.shared-input {
  color: var(--petrol);
  background: rgb(46 110 117 / 8%);
  font-weight: 700;
}

.separate-attacks code {
  color: var(--rust-dark);
  font-family: var(--mono);
  font-size: 0.6rem;
}

.attack-score {
  display: flex;
  gap: 0.45rem;
  align-items: baseline;
  margin-top: 0.55rem;
  font-size: 0.58rem;
}

.attack-score span,
.attack-score s {
  color: var(--ink-faint);
}

.attack-score strong {
  color: var(--rust-dark);
  font-size: 0.72rem;
}

.naive-trace {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.7rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid #d69b89;
  background: #fff8f5;
  color: var(--ink-soft);
  font-size: 0.56rem;
}

.naive-trace code,
.naive-trace strong {
  color: var(--rust-dark);
  font-family: var(--mono);
  font-size: 0.61rem;
}

.shared-signal {
  max-width: 25rem;
  margin: 0 auto 0.7rem;
}

.signal-cells {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.signal-window-ranges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  row-gap: 0.25rem;
  margin-top: 0.35rem;
  color: var(--ink-faint);
  font-size: 0.49rem;
  text-align: center;
}

.signal-window-ranges span {
  padding-top: 0.2rem;
  border-top: 1px solid var(--line-dark);
}

.range-zero {
  grid-column: 1 / 3;
  grid-row: 1;
}

.range-one {
  grid-column: 2 / 4;
  grid-row: 2;
}

.toy-equations {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  justify-content: center;
  margin: 0.75rem 0;
}

.toy-equations code {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.56rem;
}

.overlap-slider {
  display: block;
  margin: 0.9rem 0 1rem;
}

.overlap-slider > span:first-child {
  display: flex;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.6rem;
}

.overlap-slider output {
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 700;
}

.overlap-slider input {
  width: 100%;
  margin: 0.65rem 0 0.3rem;
}

.slider-labels {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  color: var(--ink-faint);
  font-size: 0.47rem;
  line-height: 1.35;
}

.slider-labels span:nth-child(2) {
  text-align: center;
}

.slider-labels span:last-child {
  text-align: right;
}

.merged-scores article {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.2rem 0.7rem;
  padding: 0.7rem;
  border: 1px solid var(--line);
  font-size: 0.56rem;
}

.merged-scores strong {
  grid-row: 1 / 3;
  grid-column: 2;
  align-self: center;
  font-size: 0.74rem;
}

.merged-scores small {
  color: var(--ink-faint);
  font-size: 0.49rem;
}

.merged-scores .is-below {
  border-color: #d69b89;
  background: #fff8f5;
}

.merged-scores .is-below strong,
.merged-scores .is-below small {
  color: var(--rust-dark);
}

.merged-scores .is-above strong {
  color: var(--petrol);
}

.toy-property {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.7rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--petrol);
  color: var(--ink-soft);
  font-size: 0.55rem;
}

.toy-property strong {
  color: var(--petrol);
  text-transform: uppercase;
}

.overlap-conclusion {
  margin: 0.8rem 0 0;
  padding-left: 0.7rem;
  border-left: 2px solid var(--rust);
  color: var(--rust-dark);
  font-size: 0.57rem;
}

.fixture-note {
  margin: 1rem 0 0;
  color: var(--ink-faint);
  font-size: 0.5rem;
}

.method-details details {
  border-top: 1px solid var(--line);
}

.method-details details:last-child {
  border-bottom: 1px solid var(--line);
}

.method-details summary {
  padding: 1rem 0;
  cursor: pointer;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
}

.method-details p {
  max-width: 48rem;
  margin: -0.25rem 0 1.2rem 1.2rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.research-section {
  border-top: 1px solid var(--line);
  background: #e9e5dc;
}

.paper-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 1200px;
  margin: 0 auto;
  border: 1px solid var(--line-dark);
  background: var(--surface);
}

.paper-grid article {
  padding: 2rem;
}

.paper-grid article + article {
  border-left: 1px solid var(--line-dark);
}

.paper-grid h3 {
  max-width: 30rem;
  margin: 0.6rem 0 0.8rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.35;
}

.paper-grid article > p:not(.paper-venue) {
  max-width: 33rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.disclaimer {
  max-width: 1200px;
  margin: 1.4rem auto 0;
  padding: 1rem 1.2rem;
  color: var(--ink-soft);
  border-left: 3px solid var(--rust);
  background: rgb(255 255 255 / 45%);
  font-size: 0.75rem;
}

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

footer {
  display: flex;
  justify-content: space-between;
  width: min(1440px, calc(100% - 5rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--ink-soft);
  font-size: 0.7rem;
}

footer p {
  margin: 0;
}

.toast {
  position: fixed;
  z-index: 50;
  right: 1rem;
  bottom: 1rem;
  max-width: 24rem;
  padding: 0.75rem 0.9rem;
  color: white;
  border-radius: 2px;
  background: var(--petrol);
  box-shadow: var(--shadow);
  font-size: 0.75rem;
}

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: 1fr 0.75fr;
    gap: 3rem;
  }

  .workspace {
    grid-template-columns: minmax(0, 1.35fr) minmax(19rem, 0.75fr);
  }

  .experiment-toolbar {
    grid-template-columns: 1fr 7rem auto 1fr;
  }

  .toolbar-share {
    grid-column: 4;
  }

  .legend {
    max-width: 18rem;
  }
}

@media (max-width: 900px) {
  .site-header,
  .hero,
  footer {
    width: min(100% - 2.5rem, 760px);
  }

  .site-header nav {
    gap: 0.9rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 5rem 0;
  }

  .hero-diagram {
    max-width: 620px;
  }

  .experiment-section,
  .method-section,
  .research-section {
    padding-right: 1.25rem;
    padding-left: 1.25rem;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

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

  .requirement-comparison-heading,
  .requirement-comparison-results {
    grid-template-columns: 1fr;
  }

  .requirement-comparison-heading .button {
    width: 100%;
  }

  .visualization-column {
    border-right: 0;
    border-bottom: 1px solid var(--line-dark);
  }

  .control-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .control-column > section {
    border-right: 1px solid var(--line);
  }

  .mode-panel,
  .result-card {
    grid-column: 1 / -1;
  }

  .method-flow {
    grid-template-columns: 1fr;
  }

  .overlap-demo {
    grid-template-columns: 1fr;
  }

  .method-arrow {
    display: none;
  }

  .method-flow article + article {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
  }

  .wordmark {
    display: grid;
    gap: 0;
  }

  .wordmark-divider {
    display: none;
  }

  .wordmark-project {
    font-size: 0.58rem;
  }

  .site-header nav a:not(:first-child) {
    display: none;
  }

  .hero h1 {
    font-size: clamp(3.8rem, 20vw, 6rem);
  }

  .hero-lede {
    font-size: 1.15rem;
  }

  .hero-diagram {
    padding: 1.2rem 1rem 1rem;
  }

  .diagram-flow {
    font-size: 0.58rem;
  }

  .hero-facts {
    gap: 0.5rem;
    font-size: 0.56rem;
  }

  .experiment-section,
  .method-section,
  .research-section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .section-heading h2 {
    font-size: 2.25rem;
  }

  .app-shell {
    margin-right: -1.25rem;
    margin-left: -1.25rem;
    border-right: 0;
    border-left: 0;
  }

  .experiment-toolbar {
    grid-template-columns: 1fr 6.5rem;
  }

  .experiment-toolbar .icon-button {
    grid-column: 1;
  }

  .experiment-toolbar label:nth-of-type(3) {
    grid-column: 1 / -1;
  }

  .toolbar-share {
    grid-column: 2;
    grid-row: 3;
  }

  .mode-tabs {
    overflow-x: auto;
  }

  .mode-tabs button {
    min-width: 6.2rem;
    padding-right: 0.8rem;
    padding-left: 0.8rem;
  }

  .plot-card {
    padding-right: 0.8rem;
    padding-left: 0.8rem;
  }

  .plot-heading {
    display: grid;
  }

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

  .control-column {
    grid-template-columns: 1fr;
  }

  .control-column > section,
  .mode-panel,
  .result-card {
    grid-column: 1;
    border-right: 0;
  }

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

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

  .requirement-identity,
  .requirement-status {
    grid-column: 1 / -1;
  }

  .requirement-metric {
    text-align: left;
  }

  .method-flow article,
  .paper-grid article {
    padding: 1.35rem;
  }

  .overlap-demo {
    padding: 1.35rem;
  }

  .overlap-instrument {
    padding: 1rem;
  }

  .separate-attacks,
  .merged-scores,
  .naive-trace {
    grid-template-columns: 1fr;
  }

  .naive-trace {
    gap: 0.35rem;
  }

  .toy-property {
    align-items: flex-start;
  }

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

  .paper-grid article + article {
    border-top: 1px solid var(--line-dark);
    border-left: 0;
  }

  footer {
    display: grid;
    gap: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header nav,
  .hero-actions,
  .experiment-toolbar,
  .mode-tabs,
  .control-column,
  .toast {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }

  .workspace {
    display: block;
  }

  .visualization-column {
    border: 0;
  }
}