:root {
  color-scheme: light;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #f5576c;
  --text: #1e293b;
  --muted: #64748b;
  --light: #94a3b8;
  --bg: #ffffff;
  --soft: #f8fafc;
  --soft-strong: #f1f5f9;
  --line: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  --radius: 12px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", -apple-system, BlinkMacSystemFont, ui-sans-serif, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

.container {
  width: min(1280px, calc(100% - 24px));
  margin: 0 auto;
}

.narrow {
  width: min(840px, calc(100% - 36px));
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.nav {
  width: min(1280px, calc(100% - 24px));
  min-height: 56px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  color: var(--text);
}

.brand-logo {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  transition: transform var(--transition);
}

.brand:hover .brand-logo {
  transform: translateY(-1px) rotate(-4deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #475569;
  font-size: 0.94rem;
  font-weight: 500;
}

.nav-links a {
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.hero {
  padding: 24px 0 36px;
  text-align: center;
}

.hero-inner {
  width: min(980px, calc(100% - 36px));
}

.hero-logo {
  width: min(440px, 82vw);
  height: auto;
  margin: 0 auto 8px;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  max-width: 900px;
  margin: 0 auto 22px;
  color: var(--text);
  font-size: clamp(1.7rem, 3.1vw, 2.55rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0;
}

.title-mobile {
  display: none;
}

.mobile-only-break {
  display: none;
}

h2 {
  margin-bottom: 18px;
  color: var(--text);
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  font-weight: 750;
  line-height: 1.2;
  letter-spacing: 0;
  text-align: center;
}

h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  margin: 14px auto 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #f093fb 0%, var(--accent) 100%);
}

h3,
h4 {
  color: var(--text);
  line-height: 1.35;
  letter-spacing: 0;
}

.authors {
  width: 100%;
  max-width: 930px;
  margin: 0 auto 10px;
  color: #1f2937;
  font-size: 1.08rem;
  font-weight: 500;
  line-height: 1.55;
  overflow-wrap: anywhere;
  white-space: normal;
}

.authors sup,
.affiliations sup,
.author-notes sup {
  margin-left: 1px;
  font-size: 0.68em;
}

.affiliations {
  width: 100%;
  margin: 0 auto 8px;
  color: var(--muted);
  font-size: 1.06rem;
  font-weight: 500;
  overflow-wrap: anywhere;
  white-space: normal;
}

.author-notes {
  width: 100%;
  margin: 0 auto 24px;
  color: var(--light);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
  white-space: normal;
}

.tagline {
  max-width: 820px;
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 1.08rem;
}

.resource-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.resource {
  min-height: 42px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  box-shadow: var(--shadow-md);
  font-size: 0.94rem;
  font-weight: 750;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.resource small {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.78rem;
  font-weight: 700;
}

a.resource:hover {
  transform: translateY(-2px);
  background: var(--primary);
  box-shadow: var(--shadow-lg);
}

.resource.muted {
  background: #e5e7eb;
  color: #475569;
  box-shadow: none;
}

.resource.muted small {
  color: #64748b;
}

.media-band {
  padding: 0 0 68px;
}

.gallery-heading {
  margin-bottom: 18px;
}

.gallery-heading h2 {
  margin-bottom: 0;
}

.gallery-button {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 48px;
  height: 48px;
  min-width: 0;
  min-height: 0;
  border: 1px solid rgba(255, 255, 255, 0.48);
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.76);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transform: translateY(-50%);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.gallery-button span {
  display: none;
}

.gallery-button::before {
  content: "";
  width: 13px;
  height: 13px;
  border-top: 3px solid currentColor;
  border-right: 3px solid currentColor;
}

.gallery-button-prev::before {
  transform: translateX(2px) rotate(-135deg);
}

.gallery-button-next::before {
  transform: translateX(-2px) rotate(45deg);
}

.gallery-button:hover {
  transform: translateY(-50%) scale(1.04);
  border-color: rgba(255, 255, 255, 0.86);
  background: rgba(37, 99, 235, 0.88);
}

.gallery-button-prev {
  left: -62px;
}

.gallery-button-next {
  right: -62px;
}

.video-feature {
  position: relative;
  width: min(980px, 100%);
  margin: 0 auto;
  overflow: visible;
  border-radius: var(--radius-lg);
  background: #000;
  box-shadow: var(--shadow-xl);
}

.video-feature video {
  width: 100%;
  aspect-ratio: 832 / 480;
  background: #000;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.gallery-caption {
  max-width: 980px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 0.98rem;
  text-align: center;
}

.gallery-caption p {
  margin: 0;
}

.gallery-source {
  margin-top: 6px !important;
  color: var(--light);
  font-size: 0.9rem;
}

.gallery-source a {
  color: var(--primary);
  font-weight: 750;
}

.gallery-source a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.acknowledgement {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  text-align: center;
}

.acknowledgement a {
  color: var(--primary);
  font-weight: 750;
}

.acknowledgement a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section {
  padding: 72px 0;
  border-top: 1px solid var(--line);
}

.section-muted {
  background: var(--soft);
}

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

.section-heading {
  max-width: 820px;
  margin: 0 auto 32px;
  text-align: center;
}

.section-heading.compact {
  max-width: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
}

.section-heading.compact h2 {
  margin-bottom: 0;
  text-align: left;
}

.section-heading.compact h2::after {
  margin-left: 0;
}

.paper-figure {
  margin: 0;
}

.paper-figure img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-lg);
}

.demo-group {
  margin-top: 52px;
}

.demo-group:first-of-type {
  margin-top: 28px;
}

.demo-heading {
  max-width: 820px;
  margin: 0 auto 20px;
  text-align: center;
}

.demo-heading h3 {
  margin-bottom: 8px;
  font-size: 1.55rem;
  font-weight: 760;
}

.split-results > .result-suite > h4 {
  margin-bottom: 20px;
  font-size: 1.55rem;
  font-weight: 760;
}

.demo-heading p {
  margin-bottom: 0;
}

.result-suite,
.prompt-suite {
  margin-top: 24px;
}

.result-suite + .result-suite,
.prompt-suite + .prompt-suite {
  margin-top: 34px;
}

.result-suite h4,
.prompt-suite h4 {
  margin: 0 0 12px;
  color: #363636;
  font-size: 1.08rem;
  font-weight: 800;
  text-align: center;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

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

.pair-grid,
.extended-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.prompt-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.video-card {
  overflow: hidden;
  border-radius: 6px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.video-card video {
  width: 100%;
  aspect-ratio: 832 / 480;
  background: #000;
  object-fit: cover;
}

.video-card h3 {
  min-height: 34px;
  margin: 0;
  padding: 7px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #363636;
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
}

.prompt-toggle {
  background: #fff;
  text-align: center;
}

.baseline-prompt {
  margin-top: 8px;
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
}

.prompt-summary {
  padding: 8px;
  color: var(--primary);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 750;
  list-style: none;
  user-select: none;
  transition: color var(--transition);
}

.prompt-summary::-webkit-details-marker {
  display: none;
}

.prompt-summary::after {
  content: " v";
  font-size: 0.78em;
}

.prompt-toggle[open] .prompt-summary::after {
  content: " ^";
}

.prompt-summary:hover {
  color: var(--primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prompt-text {
  margin: 0;
  padding: 11px 12px 13px;
  background: var(--soft);
  color: #4a5568;
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  text-align: left;
}

.prompt-text::before {
  content: "Text Prompt: ";
  color: var(--primary);
  font-family: Inter, "Segoe UI", ui-sans-serif, sans-serif;
  font-weight: 800;
}

.video-card.load-error::after,
.video-feature.load-error::after {
  content: "Video failed to load.";
  display: block;
  padding: 0 14px 14px;
  color: #b45309;
  background: #fff;
  font-size: 0.9rem;
}

.bibtex {
  margin: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
  background: var(--soft-strong);
  color: var(--text);
  box-shadow: var(--shadow-sm);
  font-size: 0.9rem;
  line-height: 1.55;
}

.bibtex code {
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", monospace;
}

.copy-button {
  min-width: 82px;
  min-height: 38px;
  border: 0;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  font-weight: 750;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.copy-button:hover {
  transform: translateY(-2px);
  background: var(--primary-hover);
  box-shadow: var(--shadow-md);
}

.copy-status {
  min-height: 24px;
  margin: 10px 0 0;
  color: var(--primary);
  font-size: 0.92rem;
}

.footer {
  padding: 36px 0;
  border-top: 1px solid var(--line);
  background: var(--soft);
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.footer p {
  margin: 0;
}

.footer p + p {
  margin-top: 8px;
}

.footer a {
  color: var(--primary);
  font-weight: 750;
}

.footer a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 1024px) {
  .gallery-button-prev {
    left: 10px;
  }

  .gallery-button-next {
    right: 10px;
  }

  .method-comparison-grid,
  .pair-grid,
  .extended-grid,
  .prompt-grid {
    display: flex;
    overflow-x: auto;
    gap: 10px;
    padding-bottom: 10px;
    scroll-snap-type: x mandatory;
  }

  .method-comparison-grid .video-card,
  .pair-grid .video-card,
  .extended-grid .video-card,
  .prompt-grid .video-card {
    flex: 0 0 46vw;
    scroll-snap-align: center;
  }
}

@media (max-width: 880px) {
  .nav {
    padding: 12px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    padding-top: 16px;
  }

  .hero-logo {
    width: min(340px, 84vw);
    margin-bottom: 6px;
  }

  .section-heading.compact {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .container,
  .nav,
  .hero-inner {
    width: min(1280px, calc(100% - 20px));
  }

  h1 {
    font-size: 1.52rem;
    line-height: 1.18;
  }

  .brand-logo {
    width: 30px;
    height: 30px;
  }

  .title-desktop {
    display: none;
  }

  .title-mobile {
    display: inline;
  }

  .mobile-only-break {
    display: block;
  }

  .authors,
  .affiliations {
    width: min(100%, calc(100vw - 28px));
    font-size: 0.98rem;
  }

  .author-notes {
    width: min(100%, calc(100vw - 28px));
  }

  .section {
    padding: 54px 0;
  }

  .method-comparison-grid .video-card,
  .pair-grid .video-card,
  .extended-grid .video-card,
  .prompt-grid .video-card {
    flex-basis: 78vw;
  }

  .resource {
    width: 100%;
  }

  .gallery-button-prev {
    left: 8px;
  }

  .gallery-button-next {
    right: 8px;
  }
}