:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5d6975;
  --line: #d9dee4;
  --soft-line: #e9edf1;
  --paper: #ffffff;
  --panel: #f7f8fa;
  --blue: #326a9a;
  --blue-dark: #214e75;
  --navy: #102a43;
  --navy-deep: #0a1f33;
  --sky: #eaf3f8;
  --sand: #f3eee6;
  --orange: #c66a2b;
  --teal: #36877b;
  --red: #a94848;
  font-family: Arial, "Helvetica Neue", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.55;
}

a {
  color: var(--blue-dark);
  text-underline-offset: 3px;
}

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

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="file"] {
  cursor: pointer;
}

button:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.paper-shell {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.demo-shell {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.paper-page {
  background: #fbfcfd;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  color: #fff;
  background: var(--navy-deep);
  transform: translateY(-150%);
}

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

.project-nav {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(16, 42, 67, 0.1);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.project-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 66px;
  gap: 24px;
}

.project-wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  font-size: 14px;
  text-decoration: none;
}

.project-wordmark > span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  color: #fff;
  background: var(--navy);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.project-nav nav,
.paper-footer nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.project-nav nav a,
.paper-footer nav a {
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.project-nav nav .nav-demo-link {
  padding: 8px 13px;
  border-radius: 8px;
  color: #fff;
  background: var(--navy);
}

.paper-hero {
  overflow: hidden;
  border-bottom: 1px solid rgba(16, 42, 67, 0.1);
  background:
    radial-gradient(circle at 82% 18%, rgba(50, 106, 154, 0.15), transparent 25rem),
    linear-gradient(145deg, #f7fafc 0%, #edf4f7 55%, #f7f2ea 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(280px, 0.68fr);
  align-items: center;
  gap: clamp(46px, 7vw, 90px);
  min-height: 660px;
  padding-top: 78px;
  padding-bottom: 88px;
}

.project-label,
.section-kicker,
.evidence-kicker {
  margin: 0 0 16px;
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-copy h1 {
  max-width: 820px;
  margin: 0;
  color: var(--navy-deep);
  font-size: clamp(40px, 5.2vw, 66px);
  font-weight: 760;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.paper-subtitle {
  max-width: 760px;
  margin: 24px 0 0;
  color: #41566a;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.5;
}

.paper-authors {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 5px 9px;
  margin: 28px 0 0;
  color: var(--navy);
  font-size: 14px;
}

.paper-authors span,
.paper-authors sup {
  color: #7890a3;
}

.paper-affiliation {
  max-width: 720px;
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.paper-links a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 17px;
  border: 1px solid #b8c5d0;
  border-radius: 10px;
  color: var(--navy);
  background: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.paper-links .button-primary {
  border-color: var(--navy);
  color: #fff;
  background: var(--navy);
}

.paper-links a:hover,
.paper-links a:focus-visible {
  border-color: var(--blue);
  outline: none;
  box-shadow: 0 8px 24px rgba(16, 42, 67, 0.12);
  transform: translateY(-1px);
}

.hero-evidence {
  position: relative;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  color: #fff;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%);
  box-shadow: 0 24px 60px rgba(16, 42, 67, 0.2);
}

.hero-evidence::before {
  position: absolute;
  top: 20px;
  right: 22px;
  width: 34px;
  height: 3px;
  border-radius: 99px;
  background: var(--orange);
  content: "";
}

.evidence-kicker {
  color: #acc9dc;
}

.evidence-stat {
  display: grid;
  gap: 5px;
  padding: 21px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.evidence-stat strong {
  color: #fff;
  font-size: 42px;
  letter-spacing: -0.04em;
  line-height: 1;
}

.evidence-stat.compact strong {
  font-size: 30px;
}

.evidence-stat span {
  color: #c6d6e2;
  font-size: 13px;
  line-height: 1.45;
}

.evidence-note {
  margin: 18px 0 0;
  color: #8fa9bc;
  font-size: 11px;
}

.featured-figure {
  margin: 72px auto 10px;
  padding: 20px;
  border: 1px solid var(--soft-line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(20, 46, 70, 0.08);
}

.featured-figure img,
.paper-result-figure img {
  width: 100%;
  border-radius: 12px;
  background: #fff;
}

.featured-figure figcaption,
.paper-result-figure figcaption {
  margin: 15px auto 1px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.featured-figure figcaption {
  max-width: 850px;
  text-align: center;
}

.paper-section {
  padding: 92px 0;
  border-top: 1px solid var(--soft-line);
}

.featured-figure + .paper-section {
  margin-top: 72px;
}

.section-heading-copy h2,
.demo-callout h2 {
  margin: 0;
  color: var(--navy-deep);
  font-size: clamp(30px, 3.5vw, 45px);
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.section-heading-copy > p:last-child {
  max-width: 780px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.centered-heading {
  max-width: 850px;
  margin: 0 auto 44px;
  text-align: center;
}

.centered-heading > p:last-child {
  margin-right: auto;
  margin-left: auto;
}

.abstract-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(50px, 8vw, 110px);
}

.abstract-copy {
  border-left: 3px solid #c7dbe8;
  padding-left: 30px;
}

.abstract-copy p {
  margin: 0;
  color: #344b5f;
  font-size: 17px;
  line-height: 1.8;
}

.abstract-copy p + p {
  margin-top: 20px;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.method-steps article {
  min-height: 225px;
  padding: 26px 23px;
  border: 1px solid #dce4ea;
  border-radius: 16px;
  background: #fff;
  transition: border-color 160ms ease, transform 160ms ease;
}

.method-steps article:hover {
  border-color: #a9c4d6;
  transform: translateY(-3px);
}

.method-steps span {
  display: inline-block;
  margin-bottom: 38px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.method-steps h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 20px;
}

.method-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.results-section {
  padding-bottom: 40px;
}

.result-story {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(240px, 0.65fr);
  align-items: center;
  gap: clamp(35px, 6vw, 80px);
  padding: 50px 0;
}

.result-story + .result-story {
  border-top: 1px solid var(--soft-line);
}

.reverse-story .paper-result-figure {
  order: 2;
}

.paper-result-figure {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--soft-line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 14px 40px rgba(20, 46, 70, 0.06);
}

.paper-result-figure figcaption {
  padding: 0 8px 4px;
}

.result-number {
  margin: 0 0 28px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.result-copy h3 {
  margin: 0;
  color: var(--navy);
  font-size: 28px;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.result-copy > p:last-child {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.demo-callout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(250px, 0.6fr);
  align-items: center;
  gap: 70px;
  margin: 72px 0;
  padding: 58px;
  border: 0;
  border-radius: 24px;
  color: #fff;
  background:
    radial-gradient(circle at 90% 10%, rgba(80, 153, 196, 0.28), transparent 19rem),
    var(--navy-deep);
}

.demo-callout .section-kicker {
  color: #91bdd7;
}

.demo-callout h2 {
  color: #fff;
}

.demo-callout p {
  max-width: 720px;
  margin: 18px 0 0;
  color: #c4d3df;
  font-size: 16px;
}

.demo-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 24px 0 0;
  padding: 0;
  color: #a9c0d0;
  font-size: 12px;
  list-style: none;
}

.demo-features li::before {
  margin-right: 7px;
  color: #e4a46d;
  content: "✓";
}

.demo-callout-action {
  display: grid;
  gap: 12px;
}

.demo-callout-action > span {
  color: #89a5b9;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-callout-action > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 10px;
  color: var(--navy-deep);
  background: #fff;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.demo-callout-action small {
  color: #7894a9;
  line-height: 1.5;
}

.citation-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(40px, 7vw, 90px);
}

.citation-section pre {
  overflow-x: auto;
  margin: 0;
  padding: 24px;
  border: 1px solid #d7e0e7;
  border-radius: 14px;
  color: #d8e8f2;
  background: var(--navy-deep);
  font-size: 12px;
  line-height: 1.65;
}

.paper-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 38px 0 56px;
  border-top: 1px solid var(--soft-line);
  color: var(--muted);
  font-size: 13px;
}

.paper-footer > div {
  display: grid;
  gap: 3px;
}

.paper-footer strong {
  color: var(--navy);
}

/* Functional demo */

.demo-shell {
  width: min(1260px, calc(100% - 40px));
}

.demo-masthead {
  position: relative;
  padding: 42px 0 34px;
  border-bottom: 1px solid var(--line);
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 14px;
}

.demo-masthead h1 {
  margin: 0;
  font-size: clamp(29px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.demo-masthead > p {
  max-width: 830px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.demo-masthead > .transport-notice {
  max-width: 830px;
  margin-top: 18px;
  padding: 11px 14px;
  border-left: 3px solid #b36b2c;
  color: #6f4a2b;
  background: #fff6ea;
  font-size: 13px;
  line-height: 1.55;
}

.demo-masthead > .resource-notice {
  max-width: 830px;
  margin-top: 10px;
  padding: 11px 14px;
  border-left: 3px solid var(--steel);
  color: #35556f;
  background: #eef5fa;
  font-size: 13px;
  line-height: 1.55;
}

.runtime-status {
  position: absolute;
  top: 44px;
  right: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #9aa4ad;
}

.runtime-status[data-state="online"] .status-dot {
  background: var(--teal);
}

.runtime-status[data-state="offline"] .status-dot {
  background: var(--red);
}

.active-job {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px solid #b9cedd;
  border-radius: 7px;
  background: #edf5f9;
  box-shadow: 0 8px 24px rgba(33, 78, 117, 0.08);
}

.active-job[data-state="running"] {
  border-color: #8eb8d4;
  background: #e8f3f8;
}

.active-job[data-state="cancelled"],
.active-job[data-state="failed"] {
  border-color: #d4b1b1;
  background: #fbf0f0;
}

.active-job-summary,
.active-job-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.active-job-summary > div {
  display: grid;
  gap: 2px;
}

.active-job-summary strong {
  color: var(--navy);
  font-size: 14px;
}

.active-job-summary span,
.active-job-actions > span {
  color: var(--muted);
  font-size: 12px;
}

.job-pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgba(50, 106, 154, 0.12);
}

.active-job[data-state="running"] .job-pulse {
  animation: job-pulse 1.5s ease-out infinite;
}

.active-job-actions .text-button {
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid #aebfc9;
  border-radius: 4px;
  background: #fff;
}

@keyframes job-pulse {
  0% { box-shadow: 0 0 0 0 rgba(50, 106, 154, 0.34); }
  70% { box-shadow: 0 0 0 8px rgba(50, 106, 154, 0); }
  100% { box-shadow: 0 0 0 0 rgba(50, 106, 154, 0); }
}

.demo-section {
  padding: 38px 0 46px;
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}

.section-heading > span {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  color: #fff;
  background: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
}

.section-heading h2 {
  margin: 0;
  font-size: 25px;
  line-height: 1.2;
}

.section-heading p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.case-layout {
  display: grid;
  grid-template-columns: minmax(340px, 410px) 1fr;
  align-items: stretch;
  gap: 22px;
}

.case-controls,
.geometry-panel,
.result-panel {
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
}

.case-controls {
  padding: 20px;
}

.control-group + .control-group {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--soft-line);
}

.control-group > label,
.flow-controls > label,
.control-label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.035em;
}

#geometry-source,
#airfoil-search,
#airfoil-preset,
.input-row input,
.range-control input[type="number"] {
  width: 100%;
  height: 40px;
  padding: 7px 10px;
  border: 1px solid #bdc6cf;
  border-radius: 4px;
  color: var(--ink);
  background: #fff;
}

#geometry-source:focus,
#airfoil-search:focus,
#airfoil-preset:focus,
.input-row input:focus,
.range-control input[type="number"]:focus {
  border-color: var(--blue);
  outline: 2px solid #d8e7f3;
}

.upload-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-top: 11px;
}

#coordinate-file {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
}

.file-button {
  padding: 7px 10px;
  border: 1px solid #b9c2cb;
  border-radius: 4px;
  font-size: 13px;
}

.upload-row a {
  font-size: 13px;
}

.control-help {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.control-help code {
  font-size: 11px;
}

.mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
}

.mode-tab {
  min-height: 34px;
  border: 0;
  border-radius: 3px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
}

.mode-tab.active {
  color: var(--blue-dark);
  background: #fff;
  box-shadow: 0 0 0 1px #c5cdd5;
}

.mode-panel {
  margin-top: 13px;
  min-height: 76px;
}

.mode-panel > label:not(.custom-setting) {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 12px;
}

#airfoil-search {
  margin-bottom: 8px;
}

.airfoil-description {
  margin: 8px 0 1px;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.4;
}

.airfoil-source {
  font-size: 12px;
}

.range-control {
  display: grid !important;
  grid-template-columns: 1fr 82px;
  align-items: center;
  gap: 4px 10px;
  margin-bottom: 12px !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
}

.range-control span {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.range-control input[type="range"] {
  width: 100%;
  accent-color: var(--blue-dark);
}

.range-control input[type="number"] {
  height: 36px;
  padding: 5px 8px;
}

.reference-state-readout {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 5px 12px;
  margin-top: 15px;
  padding: 11px 12px;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
}

.reference-state-readout strong {
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.reference-state-readout small {
  grid-column: 1 / -1;
  line-height: 1.45;
}

.input-row {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 10px;
}

.input-row label {
  color: var(--muted);
  font-size: 12px;
}

.input-row label:last-child {
  grid-column: 1 / -1;
}

.input-row span {
  display: block;
  margin-bottom: 4px;
}

.geometry-readout {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px 16px;
  margin-top: 12px;
  padding: 13px 14px 11px;
  border-top: 1px solid var(--soft-line);
  border-radius: 4px;
  background: #fff;
  font-size: 13px;
}

.geometry-readout > div {
  min-width: 0;
}

.geometry-readout span,
.geometry-readout strong {
  display: block;
}

.geometry-readout span {
  color: var(--muted);
  font-size: 11px;
}

.geometry-readout strong {
  margin-top: 2px;
  font-family: Arial, "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.35;
}

.geometry-readout small {
  grid-column: 1 / -1;
  color: var(--muted);
  line-height: 1.4;
}

#ood-badge {
  color: var(--blue-dark);
}

#ood-badge.edge {
  color: #9a641d;
}

#ood-badge.out {
  color: var(--red);
}

#ood-badge.id {
  color: #2d6b4f;
}

.uiuc-training-note {
  padding-left: 9px;
  border-left: 2px solid var(--soft-line);
}

.action-button {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--blue-dark);
  border-radius: 4px;
  color: var(--blue-dark);
  background: #fff;
  font-weight: 700;
}

.action-button:hover:not(:disabled),
.action-button:focus-visible {
  background: #eef4f8;
  outline: none;
}

.method-bar {
  margin-top: 22px;
  padding: 18px 20px 14px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
}

.method-bar-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 13px;
}

.method-bar-heading strong {
  font-size: 15px;
}

.method-bar-heading span {
  color: var(--muted);
  font-size: 12px;
}

.method-setting-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(260px, 1fr) minmax(300px, 1.15fr);
  align-items: stretch;
  gap: 12px;
}

.horizontal-setting,
.mesh-preparation {
  min-height: 70px;
  padding: 12px 13px;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  background: #fff;
}

.horizontal-setting {
  display: grid;
  grid-template-columns: 1fr 76px;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.horizontal-setting small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
}

.horizontal-setting input {
  width: 100%;
  height: 38px;
  padding: 6px 8px;
  border: 1px solid #bdc6cf;
  border-radius: 4px;
}

.horizontal-setting input:focus {
  border-color: var(--blue);
  outline: 2px solid #d8e7f3;
}

.mesh-preparation {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
}

.mesh-status {
  padding: 7px 9px;
  border-left: 3px solid #aab3bb;
  color: var(--muted);
  background: var(--panel);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.mesh-status.ready {
  border-left-color: var(--teal);
  color: #2c665e;
}

.case-message {
  min-height: 0;
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.case-message.error {
  color: var(--red);
}

.geometry-panel {
  min-width: 0;
  padding: 18px 20px 14px;
  background: var(--panel);
}

.panel-title-row,
.result-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.panel-title-row h3,
.result-heading h3 {
  margin: 0;
  font-size: 18px;
}

.panel-title-row p,
.result-heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.text-button {
  padding: 0;
  border: 0;
  color: var(--blue-dark);
  background: transparent;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.geometry-editor {
  position: relative;
  margin-top: 10px;
}

#airfoil-svg {
  display: block;
  width: 100%;
  min-height: 310px;
  touch-action: none;
  user-select: none;
}

.editor-grid line {
  stroke: #e1e5e9;
  stroke-width: 1;
}

.editor-grid line.major {
  stroke: #bdc5cc;
}

.editor-grid text {
  fill: #7a858e;
  font-family: Arial, "Helvetica Neue", sans-serif;
  font-size: 11px;
}

.airfoil-fill {
  fill: #dfe8ef;
  opacity: 0.68;
}

.surface-path {
  fill: none;
  stroke: #1d2c38;
  stroke-width: 2.5;
}

.handle-lines line {
  stroke: #8ca7bc;
  stroke-width: 1;
  stroke-dasharray: 4 5;
}

.handle-hit {
  fill: transparent;
  cursor: ns-resize;
}

.handle-dot {
  fill: var(--blue);
  stroke: #fff;
  stroke-width: 2;
  pointer-events: none;
}

.x-axis-label,
.y-axis-label {
  position: absolute;
  color: var(--muted);
  font-size: 12px;
}

.x-axis-label {
  left: 50%;
  bottom: 0;
}

.y-axis-label {
  top: 50%;
  left: 0;
  transform: rotate(-90deg);
}

.stage-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stage-card {
  display: grid;
  grid-template-columns: 4px 1fr auto;
  gap: 12px;
  align-items: center;
  min-height: 70px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.stage-card > i {
  width: 4px;
  height: 34px;
  border-radius: 3px;
  background: #aeb6bd;
}

#stage-surrogate > i {
  background: var(--orange);
}

#stage-recovery > i {
  background: var(--blue);
}

#stage-reference > i {
  background: #253543;
}

.stage-card strong,
.stage-card span {
  display: block;
}

.stage-card strong {
  font-size: 14px;
}

.stage-card span,
.stage-card small {
  color: var(--muted);
  font-size: 12px;
}

.stage-card.running {
  background: #f4f8fb;
}

.stage-card.complete {
  border-color: #9cb5c8;
}

.solver-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0 24px;
}

.solver-actions .action-button {
  min-height: 44px;
}

.surrogate-run {
  border-color: var(--orange);
  color: #fff;
  background: var(--orange);
}

.surrogate-run:hover:not(:disabled),
.surrogate-run:focus-visible {
  color: #fff;
  background: #ad5821;
}

.nk-run {
  border-color: var(--blue-dark);
  color: #fff;
  background: var(--blue-dark);
}

.nk-run:hover:not(:disabled),
.nk-run:focus-visible {
  color: #fff;
  background: #173d5d;
}

.adflow-run {
  border-color: #253543;
  color: #253543;
  background: #fff;
}

.adflow-run:hover:not(:disabled),
.adflow-run:focus-visible {
  color: #fff;
  background: #253543;
}

.result-panel {
  padding: 20px;
}

.result-panel + .result-panel {
  margin-top: 18px;
}

.plot-frame {
  position: relative;
  min-height: 390px;
  margin-top: 14px;
}

#cp-chart {
  display: block;
  width: 100%;
  height: 390px;
}

#cf-chart {
  display: block;
  width: 100%;
  height: 390px;
}

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

.surface-plot-grid .result-panel + .result-panel {
  margin-top: 0;
}

.surface-plot-grid .result-heading {
  display: block;
}

.surface-plot-grid .plot-legend {
  justify-content: flex-start;
  margin-top: 10px;
}

.drag-breakdown {
  display: inline-block;
  text-align: left;
}

.drag-breakdown summary {
  cursor: pointer;
  list-style-position: outside;
  text-align: right;
}

.drag-breakdown div {
  display: grid;
  grid-template-columns: auto auto;
  gap: 3px 12px;
  margin-top: 6px;
  color: var(--muted);
  font-size: 11px;
}

.chart-grid line {
  stroke: #e0e5e9;
  stroke-width: 1;
}

.chart-grid line.axis {
  stroke: #9da8b1;
}

.chart-labels text {
  fill: #66727d;
  font-family: Arial, "Helvetica Neue", sans-serif;
  font-size: 12px;
}

.plot-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 12px;
}

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

.legend-item i {
  width: 18px;
  height: 0;
  border-top: 3px solid;
}

.legend-item i.dashed {
  border-top-style: dashed;
}

.legend-item i.marked-circle,
.legend-item i.marked-square {
  position: relative;
}

.legend-item i.marked-circle::after,
.legend-item i.marked-square::after {
  position: absolute;
  top: -5px;
  left: 6px;
  width: 6px;
  height: 6px;
  border: 2px solid;
  border-color: inherit;
  background: #fff;
  content: "";
}

.legend-item i.marked-circle::after {
  border-radius: 50%;
}

.legend-item i.wide {
  border-top-width: 5px;
  opacity: 0.72;
}

.legend-separator {
  width: 1px;
  height: 17px;
  background: var(--line);
}

.empty-plot {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  color: var(--muted);
  background: var(--panel);
  font-size: 14px;
}

.metric-table-wrap {
  margin-top: 15px;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.comparison-table th,
.comparison-table td {
  padding: 10px 12px;
  border-top: 1px solid var(--soft-line);
  text-align: right;
  white-space: nowrap;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
  text-align: left;
}

.comparison-table thead th {
  border-top: 0;
  color: var(--muted);
  font-size: 12px;
}

.comparison-table tbody th {
  font-size: 13px;
  font-weight: 500;
}

.comparison-table td {
  font-size: 13px;
}

.field-heading {
  align-items: center;
}

.field-toolbar,
.error-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 12px;
  margin-top: 14px;
  padding: 12px;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  background: var(--panel);
}

.field-toolbar label,
.error-toolbar label {
  display: grid;
  gap: 3px;
  color: var(--muted);
  font-size: 11px;
}

.field-toolbar select,
.field-toolbar input,
.error-toolbar input {
  min-width: 145px;
  height: 36px;
  padding: 5px 8px;
  border: 1px solid #bdc6cf;
  border-radius: 4px;
  color: var(--ink);
  background: #fff;
}

.field-toolbar select:focus,
.field-toolbar input:focus,
.error-toolbar input:focus {
  border-color: var(--blue);
  outline: 2px solid #d8e7f3;
}

.field-toolbar .text-button,
.error-toolbar .text-button {
  height: 36px;
  padding: 0 5px;
  font-size: 12px;
}

.shared-colorbar {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.shared-colorbar i {
  width: 130px;
  height: 10px;
  border: 1px solid #c6cdd3;
  background: linear-gradient(90deg, #183e73, #418eb7, #6bb8d5, #eee4b9, #e8773c, #9e2635);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.field-item {
  margin: 0;
}

.field-item figcaption {
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 700;
}

.field-item > div {
  position: relative;
  aspect-ratio: 1.6;
  overflow: hidden;
  border: 1px solid var(--soft-line);
  background: var(--panel);
}

.field-item canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.field-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  color: #8a949d;
  font-size: 12px;
}

.error-section {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--soft-line);
}

.error-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.error-heading h4 {
  margin: 0;
  font-size: 15px;
}

.error-heading p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.error-colorbar {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.error-colorbar i {
  width: 130px;
  height: 10px;
  border: 1px solid #c6cdd3;
  background: linear-gradient(90deg, #fffdf7, #fee0a8, #f59663, #ce4970, #6f1f7b);
}

.error-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 13px;
}

.error-grid figcaption span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
}

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-evidence {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .hero-evidence .evidence-kicker,
  .hero-evidence .evidence-note {
    grid-column: 1 / -1;
  }

  .evidence-stat {
    align-content: start;
  }

  .abstract-section,
  .citation-section,
  .result-story,
  .demo-callout {
    grid-template-columns: 1fr;
  }

  .reverse-story .paper-result-figure {
    order: 0;
  }

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

  .runtime-status {
    position: static;
    margin-top: 18px;
  }

  .case-layout {
    grid-template-columns: 1fr;
  }

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

  .mesh-preparation {
    grid-column: 1 / -1;
  }

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

  .stage-summary,
  .surface-plot-grid,
  .field-grid,
  .error-grid {
    grid-template-columns: 1fr;
  }

  .field-item > div {
    aspect-ratio: 2;
  }
}

@media (max-width: 600px) {
  .paper-shell,
  .demo-shell {
    width: min(100% - 24px, 1260px);
  }

  .project-wordmark strong {
    display: none;
  }

  .project-nav nav a:not(.nav-demo-link) {
    display: none;
  }

  .project-nav-inner {
    min-height: 58px;
  }

  .hero-grid {
    padding-top: 48px;
    padding-bottom: 52px;
  }

  .hero-copy h1 {
    font-size: 39px;
  }

  .paper-authors {
    gap: 4px 7px;
  }

  .paper-links a {
    justify-content: center;
    width: 100%;
  }

  .hero-evidence {
    display: block;
    padding: 24px;
  }

  .featured-figure {
    margin-top: 42px;
    padding: 10px;
  }

  .paper-section {
    padding: 58px 0;
  }

  .featured-figure + .paper-section {
    margin-top: 42px;
  }

  .abstract-section {
    gap: 34px;
  }

  .abstract-copy {
    padding-left: 20px;
  }

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

  .method-steps article {
    min-height: 0;
  }

  .method-steps span {
    margin-bottom: 20px;
  }

  .result-story {
    gap: 28px;
    padding: 36px 0;
  }

  .demo-callout {
    gap: 36px;
    margin: 42px 0;
    padding: 34px 24px;
  }

  .citation-section {
    gap: 34px;
  }

  .active-job {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .active-job-actions {
    justify-content: space-between;
    width: 100%;
  }

  .demo-callout,
  .paper-footer,
  .panel-title-row,
  .result-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .method-bar-heading {
    display: block;
  }

  .method-bar-heading span {
    display: block;
    margin-top: 3px;
  }

  .method-setting-grid,
  .solver-actions {
    grid-template-columns: 1fr;
  }

  .mesh-preparation {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .solver-actions .action-button {
    width: 100%;
  }

  .shared-colorbar,
  .error-colorbar {
    width: 100%;
    margin-left: 0;
  }

  .case-controls,
  .geometry-panel,
  .result-panel {
    padding: 15px;
  }

  #airfoil-svg {
    min-height: 230px;
  }

  .plot-frame,
  #cp-chart {
    min-height: 310px;
    height: 310px;
  }
}