:root {
  color-scheme: light;
  --paper: #f4f6f8;
  --surface: #ffffff;
  --ink: #162033;
  --muted: #687386;
  --line: #ccd3dc;
  --blue: #2196f3;
  --blue-soft: #dcefff;
  --navy: #1a237e;
  --coral: #e53935;
  --coral-soft: #fdecea;
  --green: #198f79;
  --purple: #5637d5;
  --hero-bg: #070b18;
  --content: 1360px;
  --reading: 820px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.66;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

img {
  display: block;
  max-width: 100%;
}

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

.page-shell {
  width: min(calc(100% - 64px), var(--content));
  margin-inline: auto;
}

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

.read-progress {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 3px;
  background: transparent;
}

.read-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--coral);
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  min-height: 66px;
  padding: 0 32px;
  border-bottom: 1px solid rgba(22, 32, 51, 0.14);
  background: rgba(244, 246, 248, 0.94);
  backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 800;
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.header-identity,
.header-affiliations,
.header-affiliations a {
  display: flex;
  align-items: center;
}

.header-identity {
  min-width: 0;
}

.header-affiliations {
  height: 40px;
  margin-left: 24px;
  padding-left: 24px;
  border-left: 1px solid rgba(22, 32, 51, 0.18);
  gap: 22px;
}

.header-affiliations a {
  height: 38px;
  opacity: 0.96;
  text-decoration: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.header-affiliations a:hover,
.header-affiliations a:focus-visible {
  opacity: 1;
  transform: translateY(-1px);
}

.header-affiliations img {
  width: auto;
  max-width: 102px;
  height: 21px;
  object-fit: contain;
}

.header-affiliations .header-affiliation-seal img {
  width: 34px;
  max-width: none;
  height: 34px;
}

.header-affiliations a:last-child img {
  max-width: 118px;
  height: 23px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 13px;
  font-weight: 650;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="true"] {
  color: var(--ink);
}

.site-nav .nav-github {
  padding: 8px 11px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  color: var(--ink);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  margin: 6px auto;
  background: var(--ink);
}

.article-hero {
  padding-top: 38px;
}

.article-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.article-meta div {
  min-width: 0;
  padding: 12px 14px 14px 0;
  border-right: 1px solid var(--line);
}

.article-meta div:not(:first-child) {
  padding-left: 14px;
}

.article-meta div:last-child {
  border-right: 0;
}

.article-meta span,
.article-meta strong,
.section-kicker {
  display: block;
  font-size: 11px;
  line-height: 1.4;
  text-transform: uppercase;
}

.article-meta span,
.section-kicker {
  color: var(--muted);
  font-weight: 750;
}

.article-meta strong {
  margin-top: 7px;
  color: var(--ink);
}

.hero-title {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 58px;
  align-items: end;
  padding: 64px 0 28px;
}

.hero-wordmark {
  width: min(100%, 500px);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.04;
}

h1 {
  margin-bottom: 0;
  font-size: 68px;
  font-weight: 690;
}

h2 {
  margin: 12px 0 30px;
  font-size: 46px;
  font-weight: 660;
}

h3 {
  font-size: 24px;
}

.hero-deck {
  max-width: 980px;
  margin: 0 0 42px;
  font-size: 28px;
  line-height: 1.3;
  color: #334057;
}

.hero-authors {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.55;
}

.hero-authors p {
  margin: 0;
}

.hero-actions {
  display: flex;
  gap: 10px;
  padding: 20px 0 34px;
}

.hero-actions a,
.hero-actions span {
  padding: 9px 12px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 750;
  text-decoration: none;
}

.hero-actions .action-muted {
  border-color: var(--line);
  color: var(--muted);
}

.hero-film,
.wide-figure {
  margin: 0 auto;
}

.hero-film video,
.wide-figure img {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface);
}

.hero-film video {
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.research-film {
  margin: 0 auto;
  padding-bottom: 34px;
}

.research-film video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background: #f7f9fb;
  object-fit: contain;
}

.action-alignment-viz {
  margin: 0 auto;
  padding-bottom: 86px;
}

.action-alignment-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  padding: 24px 0 18px;
  border-top: 1px solid var(--ink);
}

.action-alignment-head h3 {
  margin: 7px 0 0;
  font-size: 30px;
}

.action-alignment-head > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-transform: uppercase;
}

.action-alignment-controls {
  display: grid;
  grid-template-columns: 1.35fr repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.action-alignment-controls button {
  min-height: 46px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
}

.action-alignment-controls button:last-child {
  border-right: 0;
}

.action-alignment-controls button[aria-pressed="true"] {
  background: var(--ink);
  color: #ffffff;
}

.action-alignment-stage {
  position: relative;
  height: min(58vh, 610px);
  min-height: 470px;
  overflow: hidden;
  background: #f7f9fb;
}

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

.action-alignment-stage canvas:active {
  cursor: grabbing;
}

.action-alignment-loading,
.action-mode-label,
.action-legend,
.action-reset {
  position: absolute;
}

.action-alignment-loading {
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.action-mode-label {
  top: 24px;
  left: 28px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
  pointer-events: none;
}

.action-reset {
  top: 18px;
  right: 22px;
  width: 40px;
  height: 40px;
  border: 1px solid #aeb9c5;
  border-radius: 4px;
  background: rgba(247, 249, 251, 0.9);
  color: var(--ink);
  cursor: pointer;
  font-size: 21px;
}

.action-legend {
  right: 24px;
  bottom: 20px;
  display: flex;
  gap: 16px;
  padding: 7px 9px;
  background: rgba(247, 249, 251, 0.9);
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  pointer-events: none;
}

.action-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.action-legend i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--legend-color);
}

.action-legend b {
  width: 17px;
  height: 1px;
  background: #8793a3;
}

.action-alignment-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--ink);
}

.action-alignment-metrics div {
  padding: 15px 18px;
  border-right: 1px solid var(--line);
}

.action-alignment-metrics div:last-child {
  border-right: 0;
}

.action-alignment-metrics span,
.action-alignment-metrics strong {
  display: block;
}

.action-alignment-metrics span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.action-alignment-metrics strong {
  margin-top: 5px;
  color: var(--ink);
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}

.embedded-results {
  padding-bottom: 112px;
}

.embedded-results-head,
.correspondence-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  padding: 24px 0 20px;
  border-top: 1px solid var(--ink);
}

.embedded-results-head h3,
.correspondence-head h3 {
  margin: 7px 0 0;
  font-size: 30px;
}

.embedded-results-head p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-transform: uppercase;
}

.shared-results-scroll {
  overflow-x: auto;
  border-bottom: 1px solid var(--ink);
  outline: none;
}

.shared-results-table {
  min-width: 1040px;
  table-layout: fixed;
  background: var(--surface);
  font-size: 14px;
}

.shared-results-table th,
.shared-results-table td {
  position: relative;
  height: 66px;
  padding: 12px 16px;
  border-right: 1px solid #e1e6ec;
}

.shared-results-table th:first-child {
  position: sticky;
  z-index: 2;
  left: 0;
  width: 292px;
  padding-left: 22px;
  background: var(--surface);
}

.shared-results-table th:last-child,
.shared-results-table td:last-child {
  border-right: 0;
}

.shared-results-table thead th {
  height: 45px;
  padding-block: 8px;
  border-top: 0;
  background: #eef2f6;
  color: #59667a;
  text-align: center;
}

.shared-results-table thead th:first-child {
  z-index: 3;
  background: #eef2f6;
  text-align: left;
}

.shared-results-table tbody th {
  padding-left: 52px;
  text-align: left;
  white-space: normal;
}

.shared-results-table tbody th:first-child {
  padding-left: 52px;
}

.shared-results-table tbody th strong,
.shared-results-table tbody th small {
  display: block;
  line-height: 1.3;
}

.shared-results-table tbody th small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.method-swatch {
  position: absolute;
  top: 22px;
  left: 22px;
  width: 16px;
  height: 16px;
  background: var(--method-color);
}

.shared-results-table tbody td {
  overflow: hidden;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.shared-results-table tbody td[style]::after {
  position: absolute;
  right: auto;
  bottom: 0;
  left: 0;
  width: calc(var(--score) * 1%);
  height: 4px;
  background: var(--method-color);
  content: "";
}

.shared-results-table tbody td:last-child {
  background: #e8f3fb;
  color: #175e91;
}

.shared-results-table .primary-result th,
.shared-results-table .primary-result td:not(:last-child) {
  background: #fff2f2;
}

.correspondence-viz {
  margin: 0 auto;
  padding-bottom: 72px;
}

.epoch-selector {
  display: grid;
  grid-template-columns: repeat(5, 48px);
  border: 1px solid var(--line);
}

.epoch-selector button {
  min-height: 40px;
  padding: 0;
  border: 0;
  border-right: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
}

.epoch-selector button:last-child {
  border-right: 0;
}

.epoch-selector button:hover,
.epoch-selector button:focus-visible {
  background: var(--blue-soft);
  color: var(--ink);
  outline: none;
}

.epoch-selector button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--surface);
}

.correspondence-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--ink);
}

.correspondence-chart {
  min-width: 0;
  padding: 22px 28px 8px 0;
}

.correspondence-chart svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.chart-grid line {
  stroke: #d6dde6;
  stroke-width: 1;
}

.chart-grid line:first-child,
.chart-grid line:nth-child(2) {
  stroke: var(--ink);
  stroke-width: 2;
}

.chart-labels text {
  fill: #66748a;
  font-family: inherit;
  font-size: 14px;
}

.chart-labels text:nth-last-child(-n+2) {
  fill: var(--ink);
  font-size: 15px;
  font-weight: 750;
}

.correlation-fit {
  stroke: var(--blue);
  stroke-width: 4;
  stroke-linecap: round;
  opacity: 0.82;
  transition: all 420ms ease;
}

.correlation-point {
  stroke: var(--surface);
  stroke-width: 3;
  transition: cx 420ms ease, cy 420ms ease, opacity 260ms ease;
}

.correspondence-readout {
  display: flex;
  min-width: 0;
  padding: 36px 28px 32px 40px;
  border-left: 1px solid var(--line);
  flex-direction: column;
}

.correspondence-readout > span,
.correspondence-readout div span {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.correspondence-readout > strong {
  margin: 4px 0 24px;
  color: var(--ink);
  font-size: 55px;
  line-height: 1;
}

.correspondence-readout div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
}

.correspondence-readout div strong {
  color: var(--blue);
  font-size: 26px;
  font-variant-numeric: tabular-nums;
}

.correspondence-readout div:nth-of-type(2) strong {
  color: var(--coral);
}

.correspondence-readout div:nth-of-type(3) strong {
  color: var(--green);
}

.correspondence-readout small {
  margin-top: auto;
  padding-top: 22px;
  color: var(--muted);
  font-size: 12px;
}

figcaption {
  max-width: 900px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.story-section {
  padding-block: 112px;
}

.story-section p {
  margin-bottom: 24px;
}

.story-section .lead {
  color: #2b374d;
  font-size: 23px;
  line-height: 1.5;
}

.tldr {
  margin-top: 52px;
  padding: 28px 0 10px;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.tldr h3 {
  color: var(--coral);
}

.tldr ul {
  margin: 0;
  padding: 0 0 18px 22px;
}

.tldr li {
  margin-bottom: 12px;
  padding-left: 8px;
}

.metric-band {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--surface);
}

.metric-band div {
  min-width: 0;
  min-height: 148px;
  padding: 28px;
  border-right: 1px solid var(--line);
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
}

.metric-band div:last-child {
  border-right: 0;
}

.metric-band strong {
  color: var(--coral);
  font-size: 34px;
  line-height: 1;
}

.metric-band span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  text-transform: uppercase;
}

.formula-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 48px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.formula-pair > div {
  padding: 26px 18px 28px 0;
}

.formula-pair > div + div {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.formula-pair span,
.formula-pair small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.formula-pair code {
  display: block;
  margin: 20px 0;
  color: var(--blue);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 21px;
  white-space: nowrap;
}

.formula-pair > div + div code {
  color: var(--green);
}

.wide-figure {
  padding-bottom: 112px;
}

.concept-band {
  padding: 82px max(32px, calc((100% - var(--content)) / 2));
  background: var(--ink);
  color: var(--surface);
}

.concept-heading {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 60px;
}

.concept-heading span {
  color: #aeb8c8;
  font-size: 12px;
  font-weight: 750;
  text-transform: uppercase;
}

.concept-heading h2 {
  margin: 0;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid #5b6576;
}

.concept-grid div {
  padding: 25px 24px 8px 0;
  border-right: 1px solid #5b6576;
}

.concept-grid div:not(:first-child) {
  padding-left: 24px;
}

.concept-grid div:last-child {
  border-right: 0;
}

.concept-grid strong {
  display: block;
  margin-bottom: 14px;
  color: #ffffff;
  font-size: 15px;
}

.concept-grid p {
  color: #bfc7d3;
  font-size: 14px;
  line-height: 1.55;
}

.geometry-section {
  padding-top: 112px;
  background: #eaf0f4;
}

.geometry-intro {
  padding-bottom: 58px;
}

.geometry-intro .lead {
  color: #2b374d;
  font-size: 23px;
  line-height: 1.5;
}

.geometry-lab {
  border-top: 1px solid rgba(22, 32, 51, 0.2);
  border-bottom: 1px solid rgba(22, 32, 51, 0.2);
  background: #f7f9fb;
}

.geometry-toolbar {
  display: grid;
  grid-template-columns: minmax(420px, 1fr) auto auto;
  align-items: stretch;
  gap: 14px;
  padding-block: 14px;
}

.variant-controls,
.dimension-controls {
  display: flex;
  align-items: stretch;
}

.variant-controls {
  min-width: 0;
  flex: 1;
}

.variant-controls button,
.dimension-controls button {
  min-height: 54px;
  border: 1px solid #aeb9c5;
  border-right: 0;
  background: rgba(255, 255, 255, 0.62);
  color: #526074;
  cursor: pointer;
  font: inherit;
}

.variant-controls button:first-child,
.dimension-controls button:first-child {
  border-radius: 5px 0 0 5px;
}

.variant-controls button:last-child,
.dimension-controls button:last-child {
  border-right: 1px solid #aeb9c5;
  border-radius: 0 5px 5px 0;
}

.variant-controls button {
  width: min(220px, 33.333%);
  padding: 8px 18px;
  text-align: left;
}

.variant-controls button span,
.variant-controls button strong {
  display: block;
  line-height: 1.35;
}

.variant-controls button span {
  color: inherit;
  font-size: 13px;
  font-weight: 750;
}

.variant-controls button strong {
  margin-top: 3px;
  color: #8793a3;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
}

.variant-controls button[aria-pressed="true"] {
  color: #ffffff;
}

.variant-controls button[aria-pressed="true"] strong {
  color: rgba(255, 255, 255, 0.74);
}

.variant-option-collapse[aria-pressed="true"] {
  border-color: #c74650;
  background: #c74650;
}

.variant-option-partial[aria-pressed="true"] {
  border-color: #377fbd;
  background: #377fbd;
}

.variant-option-complete[aria-pressed="true"] {
  border-color: #16866f;
  background: #16866f;
}

.dimension-controls button {
  width: 58px;
  padding: 0;
  font-size: 12px;
  font-weight: 800;
}

.dimension-controls button:last-child {
  width: 88px;
}

.dimension-controls button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: #ffffff;
}

.geometry-stage {
  position: relative;
  scroll-margin-top: 76px;
  display: grid;
  grid-template-columns: 1fr;
  width: 100%;
  height: min(45vh, 500px);
  min-height: 410px;
  overflow: hidden;
  border: 0;
  background: #f7f9fb;
}

.geometry-view {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.geometry-stage.mode-3d .geometry-view-2d,
.geometry-stage.mode-2d .geometry-view-3d {
  display: none;
}

.geometry-stage.mode-split {
  grid-template-columns: 1fr 1fr;
}

.geometry-stage.mode-split .geometry-view-2d {
  border-right: 0;
}

.view-label {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: #657388;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  pointer-events: none;
}

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

.geometry-stage canvas:active {
  cursor: grabbing;
}

.viewer-loading {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  padding: 10px 14px;
  border: 1px solid #bcc6d1;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.9);
  color: #536174;
  font-size: 12px;
  font-weight: 750;
  pointer-events: none;
}

.geometry-state,
.task-legend {
  position: absolute;
  pointer-events: none;
}

.geometry-state {
  top: 30px;
  left: max(32px, calc((100% - var(--content)) / 2));
  display: flex;
  flex-direction: column;
}

.geometry-state span,
.geometry-metrics span,
.geometry-state small {
  color: #718095;
  font-size: 10px;
  font-weight: 750;
  line-height: 1.4;
  text-transform: uppercase;
}

.geometry-state strong {
  margin: 7px 0 2px;
  color: var(--ink);
  font-size: 38px;
  line-height: 1;
}

.geometry-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(96px, 1fr));
  border-top: 1px solid #aeb9c5;
  border-bottom: 1px solid #aeb9c5;
}

.geometry-metrics div {
  min-width: 0;
  padding: 7px 10px 8px;
  border-right: 1px solid #c5ced8;
  background: transparent;
}

.geometry-metrics div:last-child {
  border-right: 0;
}

.geometry-metrics strong {
  display: block;
  margin-top: 3px;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.1;
}

.task-legend {
  right: max(32px, calc((100% - var(--content)) / 2));
  bottom: 24px;
  display: flex;
  gap: 18px;
  padding: 8px 10px;
  background: rgba(247, 249, 251, 0.92);
}

.task-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #58667a;
  font-size: 10px;
  font-weight: 750;
}

.task-legend i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--task-color);
}

.geometry-timeline {
  display: grid;
  grid-template-columns: 48px 1fr 48px;
  gap: 18px;
  align-items: start;
  padding-block: 22px 18px;
}

.icon-button {
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background: var(--ink);
  color: #ffffff;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.icon-button:hover {
  background: #2c3a50;
}

.icon-button.reset-view {
  border-color: #aeb9c5;
  background: transparent;
  color: var(--ink);
  font-size: 23px;
}

.timeline-track {
  min-width: 0;
  padding-top: 4px;
}

.timeline-track input {
  --timeline-progress: 0%;
  width: 100%;
  height: 22px;
  margin: 0;
  appearance: none;
  background: transparent;
  cursor: ew-resize;
}

.timeline-track input::-webkit-slider-runnable-track {
  height: 4px;
  overflow: hidden;
  border-radius: 2px;
  background: #c7d0da;
}

.timeline-track input::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  margin-top: -7px;
  appearance: none;
  border: 3px solid #ffffff;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: -100vw 0 0 100vw var(--coral), 0 0 0 1px #a93c42;
}

.timeline-track input::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: #c7d0da;
}

.timeline-track input::-moz-range-progress {
  height: 4px;
  border-radius: 2px;
  background: var(--coral);
}

.timeline-track input::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 3px solid #ffffff;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 1px #a93c42;
}

.epoch-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 3px;
  color: #778599;
  font-size: 9px;
  font-weight: 750;
}

.geometry-caption {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 54px;
  padding-bottom: 24px;
}

.geometry-caption > div:first-child > span,
.geometry-contract strong {
  display: block;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.geometry-caption p,
.geometry-contract span {
  display: block;
  margin: 5px 0 0;
  color: #657388;
  font-size: 11px;
  line-height: 1.5;
}

.geometry-contract {
  text-align: right;
}

.geometry-note {
  padding-block: 40px 92px;
}

.geometry-note p {
  margin: 0;
  color: #526074;
  font-size: 13px;
  line-height: 1.65;
}

.result-table-wrap {
  margin: 42px 0 20px;
  overflow-x: auto;
  outline: none;
}

.result-table-wrap table {
  font-size: 17px;
}

.result-table-wrap th,
.result-table-wrap td {
  padding-block: 17px;
}

.result-table-wrap thead th {
  font-size: 13px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  white-space: nowrap;
}

th:first-child,
td:first-child {
  padding-left: 0;
  text-align: left;
}

thead th {
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

tbody .macro th,
tbody .macro td {
  border-bottom-color: var(--ink);
  color: var(--coral);
}

.protocol-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.evidence-list {
  margin: 46px 0;
  border-top: 1px solid var(--ink);
}

.evidence-list div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 26px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.evidence-list strong {
  color: var(--purple);
  font-size: 30px;
}

.evidence-list span {
  color: var(--muted);
  font-size: 14px;
}

.release-band {
  padding: 94px 0;
  border-top: 1px solid var(--ink);
  background: var(--blue-soft);
}

.release-layout {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 88px;
}

.release-steps {
  border-top: 1px solid var(--ink);
}

.release-steps div {
  display: grid;
  grid-template-columns: 72px 0.8fr 1.2fr;
  gap: 18px;
  padding: 19px 0;
  border-bottom: 1px solid rgba(22, 32, 51, 0.28);
}

.release-steps span {
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.release-steps strong {
  font-size: 14px;
}

.release-steps p {
  margin: 0;
  color: #4f5e73;
  font-size: 13px;
  line-height: 1.5;
}

.site-footer {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.6fr;
  gap: 52px;
  padding-block: 58px;
  font-size: 13px;
}

.site-footer img {
  width: 210px;
  margin-bottom: 16px;
}

.site-footer p {
  color: var(--muted);
}

.site-footer > div:last-child {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .hero-title {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-wordmark {
    width: 420px;
  }

  h1 {
    font-size: 54px;
  }

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

  .metric-band div:nth-child(3) {
    border-right: 0;
  }

  .metric-band div:nth-child(-n+3) {
    border-bottom: 1px solid var(--line);
  }

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

  .concept-grid div:nth-child(2) {
    border-right: 0;
  }

  .concept-grid div:nth-child(-n+2) {
    border-bottom: 1px solid #5b6576;
  }

  .release-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .geometry-stage {
    height: 440px;
  }

  .geometry-toolbar {
    grid-template-columns: 1fr;
  }

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

  .geometry-metrics div {
    padding: 9px 12px;
  }

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

  .correspondence-chart {
    padding-right: 0;
  }

  .correspondence-readout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0 24px;
    padding: 24px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .correspondence-readout > span,
  .correspondence-readout > strong,
  .correspondence-readout small {
    grid-column: 1 / -1;
  }

  .correspondence-readout > strong {
    margin-bottom: 20px;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .page-shell {
    width: min(calc(100% - 28px), var(--content));
  }

  .reading-shell {
    width: min(calc(100% - 28px), var(--reading));
  }

  .site-header {
    min-height: 58px;
    padding-inline: 14px;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    inset: 58px 0 auto;
    display: none;
    padding: 14px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 4px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav .nav-github {
    margin-top: 10px;
    border: 1px solid var(--ink);
    text-align: center;
  }

  .article-hero {
    padding-top: 18px;
  }

  .article-meta {
    grid-template-columns: 1fr 1fr;
  }

  .article-meta div:nth-child(2) {
    border-right: 0;
  }

  .article-meta div:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .hero-title {
    padding-top: 38px;
  }

  .hero-wordmark {
    width: 270px;
  }

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-deck {
    font-size: 21px;
  }

  .hero-authors {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

  .story-section {
    padding-block: 74px;
  }

  .story-section .lead {
    font-size: 19px;
  }

  .geometry-section {
    padding-top: 74px;
  }

  .geometry-intro .lead {
    font-size: 19px;
  }

  .geometry-toolbar {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-block: 14px;
  }

  .variant-controls button {
    min-height: 58px;
    padding-inline: 9px;
  }

  .variant-controls button span {
    font-size: 11px;
  }

  .variant-controls button strong {
    font-size: 8px;
  }

  .dimension-controls button {
    width: 33.333%;
    min-height: 38px;
  }

  .dimension-controls button:last-child {
    width: 33.334%;
  }

  .geometry-stage {
    height: 410px;
    min-height: 410px;
  }

  .geometry-stage.mode-split {
    height: 650px;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }

  .geometry-stage.mode-split .geometry-view-2d {
    border-right: 0;
    border-bottom: 0;
  }

  .geometry-state {
    top: 18px;
    left: 14px;
  }

  .geometry-state strong {
    font-size: 29px;
  }

  .geometry-metrics {
    position: static;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .geometry-metrics div {
    padding: 7px 9px;
  }

  .geometry-metrics span {
    font-size: 8px;
  }

  .geometry-metrics strong {
    font-size: 14px;
  }

  .task-legend {
    right: 14px;
    bottom: 13px;
    left: 14px;
    justify-content: center;
    gap: 12px;
  }

  .task-legend span {
    font-size: 8px;
  }

  .geometry-timeline {
    grid-template-columns: 42px 1fr 42px;
    gap: 10px;
  }

  .icon-button {
    width: 42px;
    height: 42px;
  }

  .geometry-caption {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .geometry-contract {
    text-align: left;
  }

  .action-alignment-head {
    align-items: start;
    flex-direction: column;
    gap: 8px;
  }

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

  .action-alignment-controls button {
    border-bottom: 1px solid var(--line);
  }

  .action-alignment-controls button:first-child {
    grid-column: 1 / -1;
  }

  .action-alignment-stage {
    height: 420px;
    min-height: 420px;
  }

  .action-alignment-metrics div {
    padding-inline: 10px;
  }

  .action-alignment-metrics span {
    font-size: 9px;
  }

  .action-alignment-metrics strong {
    font-size: 18px;
  }

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

  .metric-band div,
  .metric-band div:nth-child(3) {
    min-height: 122px;
    padding: 20px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .metric-band div:nth-child(even) {
    border-right: 0;
  }

  .metric-band div:last-child {
    grid-column: 1 / -1;
    border-right: 0;
    border-bottom: 0;
  }

  .metric-band strong {
    font-size: 28px;
  }

  .formula-pair {
    grid-template-columns: 1fr;
  }

  .formula-pair > div + div {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .formula-pair code {
    font-size: 17px;
  }

  .wide-figure {
    padding-bottom: 74px;
  }

  .embedded-results {
    padding-bottom: 74px;
  }

  .shared-results-table {
    min-width: 900px;
  }

  .shared-results-table th:first-child {
    width: 220px;
  }

  .embedded-results-head,
  .correspondence-head {
    align-items: stretch;
    flex-direction: column;
    gap: 16px;
  }

  .embedded-results-head h3,
  .correspondence-head h3 {
    font-size: 25px;
  }

  .epoch-selector {
    grid-template-columns: repeat(5, 1fr);
    width: 100%;
  }

  .correspondence-viz {
    padding-bottom: 56px;
  }

  .correspondence-chart {
    padding-top: 14px;
  }

  .chart-labels text {
    font-size: 22px;
  }

  .chart-labels text:nth-last-child(-n+2) {
    font-size: 23px;
  }

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

  .correspondence-readout div,
  .correspondence-readout small {
    grid-column: 1;
  }

  .correspondence-readout > strong {
    font-size: 44px;
  }

  .concept-band {
    padding: 66px 14px;
  }

  .concept-heading,
  .concept-grid {
    grid-template-columns: 1fr;
  }

  .concept-grid div,
  .concept-grid div:not(:first-child) {
    padding: 20px 0 8px;
    border-right: 0;
    border-bottom: 1px solid #5b6576;
  }

  .evidence-list div {
    grid-template-columns: 92px 1fr;
  }

  .release-steps div {
    grid-template-columns: 54px 1fr;
  }

  .release-steps p {
    grid-column: 2;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ===== Immersive project opening ===== */
.site-header {
  position: fixed;
  right: 0;
  left: 0;
  border-bottom-color: transparent;
  background: linear-gradient(180deg, rgba(5, 9, 20, 0.72), rgba(5, 9, 20, 0));
  backdrop-filter: none;
  transition: background-color 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header:not(.is-scrolled) .brand,
.site-header:not(.is-scrolled) .site-nav a {
  color: #ffffff;
}

.site-header:not(.is-scrolled) .brand img {
  content: url("assets/intact-mark-light.png");
  filter: none;
}

.site-header:not(.is-scrolled) .header-affiliations {
  border-left-color: rgba(255, 255, 255, 0.26);
}

.site-header:not(.is-scrolled) .header-affiliations img {
  filter: brightness(0) invert(1);
}

.site-header:not(.is-scrolled) .menu-toggle span {
  background: #ffffff;
}

.site-header:not(.is-scrolled) .site-nav .nav-github {
  border-color: rgba(255, 255, 255, 0.54);
}

.site-header.is-scrolled {
  border-bottom-color: rgba(22, 32, 51, 0.14);
  background: rgba(244, 246, 248, 0.94);
  backdrop-filter: blur(14px);
}

@media (min-width: 761px) and (max-width: 1180px) {
  .header-affiliations {
    display: none;
  }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 96px;
    padding-top: 9px;
    align-items: flex-start;
  }

  .header-identity {
    width: calc(100% - 48px);
  }

  .header-affiliations {
    position: absolute;
    top: 51px;
    right: 14px;
    left: 14px;
    display: flex;
    height: 34px;
    margin: 0;
    padding: 0 3px;
    border: 0;
    justify-content: space-between;
    gap: 12px;
  }

  .header-affiliations a {
    height: 30px;
  }

  .header-affiliations img {
    max-width: 72px;
    height: 16px;
  }

  .header-affiliations .header-affiliation-seal img {
    width: 26px;
    height: 26px;
  }

  .header-affiliations a:last-child img {
    max-width: 82px;
    height: 18px;
  }

  .menu-toggle {
    margin-top: 1px;
  }

  .site-nav {
    inset: 96px 0 auto;
  }
}

.hero-band {
  position: relative;
  display: grid;
  min-height: max(720px, calc(100svh - 34px));
  overflow: hidden;
  place-items: center;
  background: #050914;
  color: #ffffff;
  box-shadow: none;
}

.hero-particle-canvas,
.hero-vignette {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-particle-canvas {
  display: block;
}

.hero-vignette {
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 48%, rgba(5, 9, 20, 0.1) 0 24%, rgba(5, 9, 20, 0.48) 66%, rgba(5, 9, 20, 0.92) 100%),
    linear-gradient(180deg, rgba(5, 9, 20, 0.18), rgba(5, 9, 20, 0.02) 62%, rgba(5, 9, 20, 0.72));
}

.article-hero {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: max(720px, calc(100svh - 34px));
  padding: 104px 0 88px;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.hero-overline {
  margin-bottom: 24px;
  color: #a8b8cf;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-title {
  display: flex;
  max-width: 1080px;
  padding: 0;
  align-items: center;
  flex-direction: column;
  gap: 20px;
}

.hero-wordmark {
  width: min(760px, 76vw);
  max-height: 250px;
  object-fit: contain;
}

.article-hero h1 {
  max-width: 1000px;
  color: #ffffff;
  font-size: clamp(32px, 3.2vw, 52px);
  font-weight: 620;
  line-height: 1.08;
}

.article-hero .hero-deck {
  max-width: 870px;
  margin: 24px auto 26px;
  color: #c8d4e6;
  font-size: clamp(18px, 1.55vw, 24px);
  line-height: 1.42;
}

.article-hero .hero-authors {
  display: block;
  max-width: 1120px;
  padding: 17px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  color: #dbe4f1;
  font-size: 13px;
  line-height: 1.55;
}

.hero-author-names {
  margin-bottom: 5px !important;
  color: #ffffff;
  font-size: 16px;
  font-weight: 720;
}

.hero-affiliations {
  color: #a9b8cd;
}

.article-hero .hero-actions {
  justify-content: center;
  padding: 22px 0 0;
}

.article-hero .hero-actions a {
  min-width: 118px;
  padding: 10px 16px;
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.045);
  color: #ffffff;
  backdrop-filter: blur(8px);
}

.article-hero .hero-actions .action-primary {
  border-color: var(--coral);
  background: var(--coral);
}

.hero-scroll-cue {
  position: absolute;
  z-index: 3;
  bottom: 18px;
  left: 50%;
  display: flex;
  transform: translateX(-50%);
  align-items: center;
  color: #a9b8cd;
  flex-direction: column;
  font-size: 10px;
  font-weight: 760;
  gap: 1px;
  text-decoration: none;
  text-transform: uppercase;
}

.hero-scroll-cue b {
  color: #ffffff;
  font-size: 19px;
  font-weight: 400;
}

.project-film-section {
  padding: 64px 0 98px;
  background: #050914;
  color: #d8e2f0;
}

.project-film-section .hero-film video {
  border-color: rgba(255, 255, 255, 0.16);
  background: #050914;
}

.project-film-section .hero-film figcaption {
  border-top-color: rgba(255, 255, 255, 0.17);
  color: #9fafc4;
}

.project-film-section .hero-film figcaption strong {
  color: #ffffff;
}

@media (max-width: 760px) {
  .site-header:not(.is-scrolled) .site-nav.open {
    border-bottom-color: rgba(255, 255, 255, 0.18);
    background: rgba(5, 9, 20, 0.97);
  }

  .site-header:not(.is-scrolled) .site-nav.open a {
    border-bottom-color: rgba(255, 255, 255, 0.14);
    color: #ffffff;
  }

  .hero-band,
  .article-hero {
    min-height: max(700px, calc(100svh - 24px));
  }

  .article-hero {
    padding: 86px 0 78px;
  }

  .hero-overline {
    margin-bottom: 16px;
    font-size: 9px;
  }

  .hero-title {
    gap: 15px;
  }

  .hero-wordmark {
    width: min(340px, 90vw);
  }

  .article-hero h1 {
    font-size: clamp(28px, 9vw, 38px);
  }

  .article-hero .hero-deck {
    margin-block: 18px 20px;
    font-size: 17px;
  }

  .article-hero .hero-authors {
    padding-top: 13px;
    font-size: 10px;
  }

  .hero-author-names {
    font-size: 13px;
  }

  .article-hero .hero-actions {
    gap: 7px;
    padding-top: 17px;
  }

  .article-hero .hero-actions a {
    min-width: 0;
    padding: 8px 10px;
    font-size: 10px;
  }

  .hero-scroll-cue {
    bottom: 9px;
  }

  .project-film-section {
    padding: 28px 0 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Skip-to-content link (keyboard accessibility). */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 1000;
  padding: 10px 16px;
  background: #162033;
  color: #f4f6f8;
  border-radius: 0 0 8px 0;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

/* ===== Dark hero band: 4-task SNE background, red/black/blue brand ===== */
.hero-band {
  position: relative;
  background-color: var(--hero-bg);
  background-image:
    linear-gradient(115deg, rgba(7, 11, 24, 0.94) 0%, rgba(7, 11, 24, 0.48) 40%, rgba(10, 15, 30, 0.82) 100%),
    url("assets/hero-sne-bg.jpg");
  background-size: cover;
  background-position: center center;
  color: #f6f8fc;
  border-bottom: 1px solid #05070f;
  box-shadow: inset 0 -140px 180px -70px rgba(7, 11, 24, 0.92);
}

.article-hero {
  position: relative;
  z-index: 1;
  padding-top: 50px;
}

.article-hero .article-meta {
  border-top-color: rgba(255, 255, 255, 0.28);
  border-bottom-color: rgba(255, 255, 255, 0.14);
}

.article-hero .article-meta div {
  border-right-color: rgba(255, 255, 255, 0.12);
}

.article-hero .article-meta span,
.article-hero .section-kicker {
  color: #9fb0cc;
}

.article-hero .article-meta strong {
  color: #ffffff;
}

.article-hero h1 {
  color: #ffffff;
}

.article-hero .hero-deck {
  color: #ccd6ea;
}

.article-hero .hero-authors {
  border-top-color: rgba(255, 255, 255, 0.14);
  color: #d4dcea;
}

.article-hero .hero-actions a,
.article-hero .hero-actions span {
  border-color: rgba(255, 255, 255, 0.34);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.04);
}

.article-hero .hero-actions a:hover {
  border-color: var(--blue);
  color: #ffffff;
  background: rgba(33, 150, 243, 0.22);
}

.article-hero .hero-actions .action-muted {
  background: var(--coral);
  border-color: var(--coral);
  color: #ffffff;
}

.article-hero .hero-actions .action-muted:hover {
  background: #c02824;
  border-color: #c02824;
  color: #ffffff;
}

.article-hero .hero-film video {
  border-color: rgba(255, 255, 255, 0.16);
  background: #0a0f1e;
}

/* ===== Viewer polish: brand-aligned controls, stable HUD, hover/focus, responsive ===== */
.variant-option-collapse[aria-pressed="true"] { border-color: var(--coral); background: var(--coral); }
.variant-option-partial[aria-pressed="true"] { border-color: var(--blue); background: var(--blue); }
.variant-option-complete[aria-pressed="true"] { border-color: var(--navy); background: var(--navy); }

.variant-controls button,
.dimension-controls button {
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}

.variant-controls button:not([aria-pressed="true"]):hover,
.dimension-controls button:not([aria-pressed="true"]):hover {
  background: rgba(33, 150, 243, 0.12);
  color: var(--ink);
}

.variant-controls button:focus-visible,
.dimension-controls button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

/* Stop the numeric readouts from jittering as they update. */
.geometry-state strong,
.geometry-metrics strong,
.geometry-state small {
  font-variant-numeric: tabular-nums;
}

/* Brand accent stripe across the three metric cells. */
.geometry-metrics div { border-top: 2px solid transparent; }
.geometry-metrics div:nth-child(1) { border-top-color: var(--coral); }
.geometry-metrics div:nth-child(2) { border-top-color: var(--blue); }
.geometry-metrics div:nth-child(3) { border-top-color: var(--navy); }

@media (max-width: 760px) {
  .geometry-stage { height: 410px; min-height: 410px; }
  .geometry-stage.mode-split { height: 650px; }
  .geometry-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .geometry-metrics div { padding: 8px 10px 9px; }
  .geometry-metrics strong { font-size: 14px; }
  .geometry-state strong { font-size: 30px; }
}

/* Keep the interactive canvas, rather than the legacy raster, as the hero surface. */
.hero-band {
  background-color: #050914;
  background-image: none;
  border-bottom: 0;
  box-shadow: none;
}

.article-hero {
  z-index: 2;
  padding: 104px 0 88px;
}

.article-hero .hero-actions a span {
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  backdrop-filter: none;
}

@media (max-width: 760px) {
  .article-hero {
    padding: 86px 0 78px;
  }
}

/* ===== Editorial tightening and full-width project film ===== */
.hero-vignette {
  background:
    radial-gradient(circle at 50% 48%, rgba(5, 9, 20, 0.03) 0 30%, rgba(5, 9, 20, 0.35) 68%, rgba(5, 9, 20, 0.86) 100%),
    linear-gradient(180deg, rgba(5, 9, 20, 0.11), rgba(5, 9, 20, 0.01) 64%, rgba(5, 9, 20, 0.65));
}

.project-film-section {
  padding: 0 0 72px;
}

.project-film-section .hero-film {
  position: relative;
  width: 100%;
  max-width: none;
}

.project-film-section .hero-film video {
  width: 100%;
  max-height: calc(100svh - 20px);
  border: 0;
  object-fit: cover;
}

.film-play-fallback {
  position: absolute;
  z-index: 3;
  top: min(50%, calc(100svh / 2));
  left: 50%;
  display: grid;
  width: 58px;
  height: 58px;
  padding: 0 0 0 4px;
  transform: translate(-50%, -50%);
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  background: rgba(5, 9, 20, 0.72);
  color: #ffffff;
  cursor: pointer;
  font-size: 22px;
  backdrop-filter: blur(10px);
}

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

.project-film-section .hero-film figcaption {
  width: min(calc(100% - 64px), var(--content));
  max-width: none;
  margin: 0 auto;
  padding: 18px 0 0;
}

.story-section {
  padding-block: 88px;
}

.wide-figure,
.embedded-results,
.correspondence-viz,
.action-alignment-viz {
  padding-bottom: 82px;
}

/* ===== Native controller figure ===== */
.controller-figure {
  margin: 0 auto;
  padding: 10px 0 86px;
}

.controller-figure-head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 72px;
  align-items: end;
  padding: 26px 0 24px;
  border-top: 1px solid var(--ink);
}

.controller-figure-head h3 {
  margin: 8px 0 0;
  font-size: clamp(31px, 3vw, 46px);
}

.controller-figure-head p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.55;
}

.controller-charts {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--ink);
  background: var(--surface);
}

.controller-charts > section {
  min-width: 0;
  padding: 28px 32px 30px;
}

.controller-charts > section + section {
  border-left: 1px solid var(--line);
}

.controller-panel-title {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.controller-panel-title > span {
  color: var(--coral);
  font-size: 12px;
  font-weight: 850;
}

.controller-panel-title strong,
.controller-panel-title small {
  display: block;
}

.controller-panel-title strong {
  color: var(--ink);
  font-size: 20px;
  line-height: 1.15;
}

.controller-panel-title small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 720;
  text-transform: uppercase;
}

.controller-legend {
  display: flex;
  justify-content: flex-end;
  gap: 18px;
  margin: 18px 0 4px;
  color: #4d5a6d;
  font-size: 11px;
  font-weight: 720;
}

.controller-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.controller-legend i {
  width: 19px;
  height: 7px;
}

.inverse-swatch {
  background: #087bb7;
}

.intact-swatch {
  background: var(--coral);
}

.native-bar-chart {
  position: relative;
  height: 350px;
  padding: 22px 0 36px 45px;
}

.bar-grid {
  position: absolute;
  inset: 22px 0 36px 0;
  display: flex;
  justify-content: space-between;
  flex-direction: column;
  pointer-events: none;
}

.bar-grid::before,
.bar-grid span {
  border-top: 1px solid #dde3ea;
}

.bar-grid::before {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 45px;
  content: "";
}

.bar-grid span {
  position: relative;
  display: block;
  border-top: 0;
  color: #7a8698;
  font-size: 10px;
  line-height: 0;
  text-align: left;
}

.bar-grid span::after {
  position: absolute;
  top: 0;
  right: 0;
  left: 45px;
  border-top: 1px solid #dde3ea;
  content: "";
}

.bar-groups {
  position: absolute;
  inset: 22px 0 0 45px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.bar-group {
  display: grid;
  min-width: 0;
  height: 328px;
  grid-template-rows: 292px 36px;
}

.bar-group > span {
  align-self: end;
  color: #26344a;
  font-size: 12px;
  font-weight: 760;
  text-align: center;
}

.bars {
  display: flex;
  height: 292px;
  align-items: end;
  justify-content: center;
  gap: 4px;
}

.bar {
  position: relative;
  display: block;
  width: min(34px, 38%);
  height: var(--value);
  min-height: 12px;
  transform: scaleY(0.02);
  transform-origin: bottom;
  transition: transform 900ms cubic-bezier(.2, .75, .25, 1);
}

.controller-figure.visible .bar {
  transform: scaleY(1);
}

.bar.inverse {
  background: linear-gradient(180deg, #1197d5, #096a9d);
}

.bar.intact {
  background: linear-gradient(180deg, #f05a60, #c93545);
  transition-delay: 120ms;
}

.bar b {
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  color: #ffffff;
  font-size: 9px;
  font-style: normal;
  font-weight: 820;
  text-align: center;
}

.bar em {
  position: absolute;
  top: -25px;
  left: 50%;
  color: var(--coral);
  font-size: 11px;
  font-style: normal;
  font-weight: 850;
  transform: translateX(-50%);
  white-space: nowrap;
}

.controller-search-panel {
  position: relative;
}

.native-search-chart {
  display: block;
  width: 100%;
  margin-top: 2px;
  overflow: visible;
}

.search-grid line,
.search-axis line {
  stroke: #dce3eb;
  stroke-width: 1;
}

.search-grid text,
.search-axis text {
  fill: #7a8698;
  font-family: inherit;
  font-size: 11px;
}

.search-trend {
  fill: none;
  stroke: #c4ccd7;
  stroke-dasharray: 5 6;
  stroke-width: 2;
}

.search-point line {
  stroke-width: 2;
}

.search-point circle {
  stroke: #ffffff;
  stroke-width: 3;
}

.search-point text {
  font-family: inherit;
  font-size: 13px;
  font-weight: 760;
}

.direct-point line,
.direct-point circle {
  fill: var(--coral);
  stroke: var(--coral);
}

.direct-point circle {
  stroke: #ffffff;
}

.direct-point text {
  fill: var(--coral);
}

.guarded-point line,
.guarded-point circle {
  fill: #df9900;
  stroke: #df9900;
}

.guarded-point circle {
  stroke: #ffffff;
}

.guarded-point text {
  fill: #c48600;
}

.cem-point line,
.cem-point circle {
  fill: #8d98a6;
  stroke: #8d98a6;
}

.cem-point circle {
  stroke: #ffffff;
}

.cem-point text {
  fill: #788493;
}

.search-verdict {
  display: flex;
  margin: -4px 0 0 64px;
  align-items: baseline;
  color: var(--muted);
  gap: 10px;
}

.search-verdict strong {
  color: var(--purple);
  font-size: 23px;
}

.search-verdict span {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.controller-figure figcaption {
  max-width: none;
  margin-top: 16px;
}

/* ===== Release and affiliations ===== */
.release-band {
  padding: 76px 0;
}

.release-layout {
  grid-template-columns: minmax(300px, 0.7fr) minmax(0, 1.3fr);
  gap: 64px;
}

.release-layout h2 {
  max-width: 500px;
  font-size: clamp(39px, 4vw, 54px);
}

.release-steps div {
  grid-template-columns: 72px minmax(180px, 0.9fr) minmax(0, 1.1fr);
  gap: 22px;
  padding: 23px 0;
  align-items: start;
}

.release-steps span {
  font-size: 12px;
}

.release-steps strong {
  font-size: 17px;
  line-height: 1.35;
}

.release-steps p {
  font-size: 15px;
  line-height: 1.55;
}

.site-footer {
  display: block;
  padding: 0;
  font-size: 13px;
}

.footer-affiliations {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 42px;
  padding-block: 38px;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.footer-affiliations > span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 780;
  text-transform: uppercase;
}

.footer-affiliations > div {
  display: flex;
  align-items: center;
  gap: clamp(42px, 7vw, 100px);
}

.footer-affiliations a {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.footer-affiliations img {
  width: auto;
  height: 42px;
  margin: 0;
  object-fit: contain;
}

.footer-affiliations a:first-child img {
  height: 37px;
}

.site-footer > div.footer-main:last-child {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.6fr;
  gap: 52px;
  padding-block: 46px 54px;
}

.footer-main > div:first-child img {
  width: 210px;
  margin-bottom: 16px;
}

.footer-main > div:last-child {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

@media (max-width: 980px) {
  .controller-figure-head {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .controller-charts {
    grid-template-columns: 1fr;
  }

  .controller-charts > section + section {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .release-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 760px) {
  .project-film-section {
    padding: 0 0 48px;
  }

  .project-film-section .hero-film figcaption {
    width: min(calc(100% - 32px), var(--content));
    padding-top: 13px;
  }

  .story-section {
    padding-block: 66px;
  }

  .wide-figure,
  .embedded-results,
  .correspondence-viz,
  .action-alignment-viz,
  .controller-figure {
    padding-bottom: 62px;
  }

  .controller-figure-head {
    padding-top: 20px;
  }

  .controller-figure-head h3 {
    font-size: 31px;
  }

  .controller-figure-head p {
    font-size: 15px;
  }

  .controller-charts > section {
    padding: 22px 14px 25px;
  }

  .controller-legend {
    align-items: flex-end;
    flex-direction: column;
    gap: 5px;
  }

  .native-bar-chart {
    height: 320px;
    padding-left: 30px;
  }

  .bar-grid::before,
  .bar-grid span::after,
  .bar-groups {
    left: 30px;
  }

  .bar-groups {
    gap: 5px;
  }

  .bar-group {
    height: 298px;
    grid-template-rows: 264px 34px;
  }

  .bars {
    height: 264px;
    gap: 2px;
  }

  .bar {
    width: min(27px, 45%);
  }

  .bar b {
    font-size: 8px;
  }

  .bar-group > span {
    font-size: 9px;
  }

  .search-verdict {
    display: block;
    margin: 2px 0 0 24px;
  }

  .search-verdict strong,
  .search-verdict span {
    display: block;
  }

  .search-verdict strong {
    white-space: nowrap;
  }

  .search-verdict span {
    margin-top: 2px;
    font-size: 10px;
  }

  .release-band {
    padding: 58px 0;
  }

  .release-layout h2 {
    font-size: 38px;
  }

  .release-steps div {
    grid-template-columns: 54px 1fr;
    gap: 8px 14px;
    padding: 19px 0;
  }

  .release-steps p {
    grid-column: 2;
    font-size: 14px;
  }

  .footer-affiliations {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-block: 30px;
  }

  .footer-affiliations > div {
    align-items: flex-start;
    flex-direction: column;
    gap: 24px;
  }

  .footer-affiliations img {
    max-width: 260px;
    height: 36px;
  }

  .footer-affiliations a:first-child img {
    height: 31px;
  }

  .site-footer > div.footer-main:last-child {
    grid-template-columns: 1fr;
    gap: 26px;
    padding-block: 34px 44px;
  }
}