:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-soft: #fafafa;
  --line: #e6e6e6;
  --line-strong: #d8d8d8;
  --text: #222222;
  --muted: #5c5c5c;
  --link: #2f83d5;
  --button: #343434;
  --button-hover: #1f1f1f;
  --shadow-soft: 0 6px 18px rgba(0, 0, 0, 0.08);
  --content-width: 1320px;
  --measure: 1040px;
  --radius-md: 12px;
  --radius-lg: 18px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Nimbus Sans", "Nimbus Sans L", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 22px;
  color: var(--text);
  background: var(--bg);
}

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

a {
  color: inherit;
  text-decoration: none;
}

code,
pre {
  font-family: "SFMono-Regular", "Consolas", monospace;
}

.page-shell {
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
  padding: 0 0 48px;
}

.topbar {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 64px;
  padding: 0 max(24px, calc((100vw - var(--content-width)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 5px 18px rgba(0, 0, 0, 0.06);
  opacity: 0;
  transform: translateY(-100%);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.topbar.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.brand {
  display: flex;
  align-items: center;
}

.brand img {
  display: block;
  width: auto;
  height: 25px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.menu-toggle {
  display: none;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-weight: 600;
}

.section {
  width: min(100%, var(--measure));
  margin: 0 auto 40px;
}

.section-wide {
  width: min(100%, 1180px);
}

.hero {
  width: min(100%, 1120px);
  margin-bottom: 46px;
  padding-top: clamp(64px, 9vw, 118px);
}

.hero-copy {
  text-align: center;
}

.hero-wordmark {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
}

.hero-wordmark img {
  width: min(280px, 42vw);
  height: auto;
}

h1,
h2,
h3 {
  font-family: "Nimbus Sans", "Nimbus Sans L", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

h1 {
  max-width: 1060px;
  margin: 0 auto;
  font-size: clamp(2.1rem, 4.2vw, 3.65rem);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 10px;
  font-size: 2.15rem;
  line-height: 1.22;
  font-weight: 700;
  text-align: center;
}

h3 {
  font-size: 1.18rem;
  line-height: 1.4;
}

.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 12px;
  margin-top: 26px;
  font-size: 1.15rem;
  font-weight: 500;
}

.authors.centered,
.hero-actions.centered {
  justify-content: center;
}

.affiliations.centered {
  text-align: center;
}

.authors span {
  color: var(--link);
}

.authors span::after {
  content: ",";
  margin-left: 12px;
  color: var(--muted);
}

.authors span:last-child::after {
  content: "";
  margin: 0;
}

.affiliations,
.hero-note,
.hero-subtitle,
.prose-card p,
.info-card p,
.result-card p,
.comparison-card p,
.comparison-note li,
.asset-row,
.footer,
.section-intro,
.teaser-panel figcaption {
  color: var(--muted);
  line-height: 1.75;
}

.prose-card p,
.info-card p,
.result-card p,
.comparison-card p,
.comparison-note li,
.section-intro,
.teaser-panel figcaption,
.bibtex-card pre,
.footer {
  font-size: 1.04rem;
}

.affiliations {
  margin-top: 7px;
  font-size: 1.05rem;
  line-height: 1.55;
}

.hero-note {
  margin-top: 10px;
  font-size: 0.98rem;
  font-weight: 600;
  color: #3d3d3d;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 25px;
}

.institution-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  width: min(100%, 1100px);
  margin: 28px auto 0;
}

.institution-logo {
  width: 100%;
  max-width: 230px;
  height: 64px;
  object-fit: contain;
}

.logo-jlu {
  height: 62px;
}

.button,
.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-width: 116px;
  min-height: 44px;
  padding: 0 20px;
  border: 0;
  border-radius: 999px;
  background: var(--button);
  color: #fff;
  font-size: 0.94rem;
  font-weight: 600;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.13);
  transition: background 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

.button:hover,
.button:focus-visible,
.copy-button:hover,
.copy-button:focus-visible {
  background: var(--button-hover);
  transform: translateY(-2px);
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.16);
}

.button.primary {
  background: #2f2f2f;
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 25px;
}

.link-block {
  display: inline-flex;
}

.publication-links .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  background: #2f2f2f;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 400;
  text-decoration: none;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.13);
  transition: background 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

.publication-links .button:hover,
.publication-links .button:focus-visible {
  background: #1f1f1f;
  transform: translateY(-2px);
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.16);
}

.publication-links .button .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.teaser-panel,
.comparison-card,
.bibtex-card {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.teaser-panel img {
  width: 100%;
  height: auto;
}

.teaser-panel figcaption {
  padding-top: 12px;
  font-size: 0.96rem;
}

.teaser-tldr {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 18px;
  padding: 14px 22px;
  border-radius: 999px;
  background: #2f83d5;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.45;
  white-space: nowrap;
}

.teaser-video-panel {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.teaser-video-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 16px;
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.teaser-video-header strong {
  letter-spacing: -0.02em;
}

.teaser-lightning {
  color: #f5b800;
}

.teaser-highlight {
  color: #f5b800;
}

.teaser-video {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  background: #fff;
}

.video-load-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #fff;
}

.teaser-video-panel .video-load-frame {
  border-radius: 0;
}

.video-load-progress {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  left: 0;
  height: 5px;
  overflow: hidden;
  background: rgba(47, 131, 213, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.video-load-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--link);
  transform: scaleX(0);
  transform-origin: left;
}

.video-load-progress.is-loading {
  opacity: 1;
}

.video-load-progress.is-indeterminate span {
  width: 42%;
  transform: translateX(-110%);
  animation: video-loading 1.15s ease-in-out infinite;
}

@keyframes video-loading {
  to {
    transform: translateX(340%);
  }
}

.section-heading {
  margin-bottom: 16px;
}

.section-intro {
  max-width: 74ch;
  margin: 0 auto;
  text-align: center;
}

.prose-card {
  max-width: 82ch;
  margin: 0 auto;
}

.method-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}

.method-figure {
  max-width: 980px;
  margin: 0 auto;
}

.method-figure img {
  width: 100%;
  height: auto;
}

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

.stack {
  display: grid;
  gap: 14px;
}

.info-card,
.result-card,
.comparison-note {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.info-card h3,
.result-card h3,
.comparison-note h3 {
  margin-bottom: 8px;
}

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

.benchmark-stack {
  display: grid;
  gap: 22px;
}

.result-card {
  overflow: hidden;
}

.result-card img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: #fff;
}

.result-card h3 {
  margin-top: 14px;
}

.benchmark-card {
  display: grid;
  gap: 16px;
  padding: 18px;
}

.benchmark-copy {
  max-width: 78ch;
}

.benchmark-copy h3 {
  margin-bottom: 8px;
}

.benchmark-copy p {
  max-width: 74ch;
}

.benchmark-visual {
  margin: 0;
}

.benchmark-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
}

.visualization-gallery {
  display: grid;
  gap: 18px;
}

.visualization-stage {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  padding: 16px;
}

.qualitative-viewer {
  width: 100%;
  height: min(60vh, 520px);
  min-height: 360px;
  border-radius: var(--radius-lg);
  background: #fff;
  --poster-color: transparent;
}

.sequence-video-player {
  width: 100%;
  height: min(60vh, 520px);
  min-height: 360px;
  border-radius: var(--radius-lg);
  background: #fff;
  object-fit: contain;
}

.visualization-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 4px 0;
}

.visualization-eyebrow {
  margin-bottom: 6px;
  color: var(--link);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.visualization-copy h3 {
  margin-bottom: 6px;
  font-size: 1.35rem;
}

.visualization-file {
  color: var(--muted);
  line-height: 1.75;
}

.visualization-tips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.visualization-tips span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 600;
}

.visualization-file {
  font-size: 0.96rem;
}

.visualization-thumbnails {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 220px));
  gap: 14px;
}

#sequence-video-thumbnails {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 2px 2px 10px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

#sequence-video-thumbnails .visualization-thumb {
  flex: 0 0 160px;
  min-width: 160px;
  scroll-snap-align: start;
}

#sequence-video-thumbnails::-webkit-scrollbar {
  height: 10px;
}

#sequence-video-thumbnails::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.06);
  border-radius: 999px;
}

#sequence-video-thumbnails::-webkit-scrollbar-thumb {
  background: rgba(47, 131, 213, 0.32);
  border-radius: 999px;
}

#sequence-video-thumbnails::-webkit-scrollbar-thumb:hover {
  background: rgba(47, 131, 213, 0.5);
}

.visualization-thumb {
  display: grid;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  text-align: left;
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

.visualization-thumb:hover,
.visualization-thumb:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(47, 131, 213, 0.55);
}

.visualization-thumb.is-active {
  border-color: var(--link);
  box-shadow: 0 8px 22px rgba(47, 131, 213, 0.16);
}

.visualization-thumb img {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 10px;
  object-fit: cover;
}

.visualization-thumb-label {
  padding: 0 4px 2px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.comparison-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.7fr);
  gap: 22px;
  align-items: start;
}

.interactive-comparison {
  display: grid;
  gap: 16px;
  margin-bottom: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.comparison-controlbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.comparison-eyebrow {
  margin-bottom: 4px;
  color: var(--link);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.comparison-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.comparison-sync {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 600;
}

.comparison-sync input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--link);
}

.comparison-viewers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.comparison-viewer-card {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}

.comparison-viewer-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.comparison-method-label {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  background: #2f83d5;
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
}

.comparison-viewer-card-cut3r .comparison-method-label {
  background: #6d6d6d;
}

.comparison-viewer-card-ttt3r .comparison-method-label {
  background: #2f7d66;
}

.comparison-method-description {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
}

.comparison-viewer-frame {
  min-height: 320px;
  background: #fff;
}

.comparison-model-viewer {
  width: 100%;
  height: clamp(320px, 38vw, 460px);
  min-height: 320px;
  background: #fff;
  --poster-color: transparent;
}

.comparison-missing {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  min-height: 320px;
  padding: 18px;
  background: var(--surface-soft);
}

.comparison-missing img {
  width: min(220px, 70%);
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  object-fit: cover;
  opacity: 0.72;
  filter: grayscale(0.2);
}

.comparison-missing p {
  max-width: 28ch;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
  text-align: center;
  word-break: break-word;
}

.comparison-scenes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.comparison-scene-thumb {
  display: grid;
  gap: 6px;
  width: 136px;
  padding: 6px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  text-align: left;
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

.comparison-scene-thumb:hover,
.comparison-scene-thumb:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(47, 131, 213, 0.55);
}

.comparison-scene-thumb.is-active {
  border-color: var(--link);
  box-shadow: 0 8px 22px rgba(47, 131, 213, 0.18);
}

.comparison-scene-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.comparison-scene-thumb span {
  padding: 0 2px 2px;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 700;
}

.comparison-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

.comparison-card img {
  width: 100%;
  border: 1px solid var(--line);
}

.comparison-figure-card {
  padding: 18px;
}

.comparison-figure-card img {
  object-fit: contain;
}

.comparison-card p {
  margin-top: 12px;
}

.comparison-note ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

.comparison-note li + li {
  margin-top: 8px;
}

.asset-table {
  display: grid;
  gap: 10px;
}

.asset-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.asset-row span {
  color: var(--text);
  font-weight: 600;
}

.asset-row code {
  white-space: normal;
  text-align: right;
}

.bibtex-card {
  position: relative;
  box-shadow: none;
}

.copy-button {
  position: absolute;
  top: 14px;
  right: 14px;
}

.bibtex-card pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  color: var(--text);
  line-height: 1.7;
}

.footer {
  width: min(100%, var(--measure));
  margin: 6px auto 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 0.92rem;
}

.reveal,
.js-enabled .reveal,
.js-enabled .reveal.is-visible {
  opacity: 1;
  transform: none;
  transition: none;
}

@media (max-width: 980px) {
  .method-layout,
  .comparison-grid,
  .gallery-grid,
  .comparison-viewers {
    grid-template-columns: 1fr;
  }

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

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    min-width: 210px;
    padding: 12px;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: var(--shadow-soft);
  }

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

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .topbar {
    padding-right: 16px;
    padding-left: 16px;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(calc(100% - 20px), var(--content-width));
    padding-top: 0;
  }

  .hero {
    padding-top: 54px;
  }

  .institution-logos {
    gap: 14px;
  }

  .institution-logo {
    max-width: 170px;
    height: 50px;
  }

  .logo-jlu {
    height: 48px;
  }

  h1 {
    font-size: clamp(2rem, 9vw, 2.8rem);
  }

  h2 {
    font-size: 1.8rem;
  }

  .authors {
    gap: 6px 12px;
    font-size: 0.98rem;
  }

  .authors span::after {
    margin-left: 12px;
  }

  .asset-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .asset-row code {
    text-align: left;
  }

  .bibtex-card pre {
    padding-top: 62px;
  }

  .qualitative-viewer {
    height: 56vh;
    min-height: 340px;
  }

  .sequence-video-player {
    height: 56vh;
    min-height: 340px;
  }

  .visualization-toolbar {
    align-items: flex-start;
  }

  .visualization-thumbnails {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  #sequence-video-thumbnails .visualization-thumb {
    flex-basis: 148px;
    min-width: 148px;
  }

  .interactive-comparison {
    padding: 12px;
  }

  .comparison-controlbar,
  .comparison-actions {
    align-items: flex-start;
    justify-content: flex-start;
  }

  .comparison-scene-thumb {
    width: min(148px, calc(50% - 8px));
  }
}