:root {
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #1f4e8a;
  --bg: #ffffff;
  --rule: #e5e5e5;
  --max-width: 1290px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.hero { text-align: center; margin-bottom: 3rem; }

.paper-title {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 1.5rem;
  font-weight: 700;
}

.authors, .affiliations, .links {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1rem;
}

.authors li { font-size: clamp(0.95rem, 1.8vw, 1.3rem); }
.affiliations li { color: var(--muted); font-size: clamp(0.85rem, 1.5vw, 1.1rem); }
.corresponding {
  color: var(--muted);
  margin: 0 0 0.75rem;
  font-size: clamp(0.85rem, 1.5vw, 1.05rem);
}

.institution-logos {
  list-style: none;
  padding: 0;
  margin: 0 0 3rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.25rem 2.5rem;
}
.institution-logos img {
  display: block;
  height: clamp(36px, 6vw, 60px);
  width: auto;
  max-width: 180px;
  object-fit: contain;
}
.institution-logos .logo-mcgill img {
  height: clamp(44px, 7vw, 72px);
  max-width: 280px;
}
.institution-logos .logo-harvard img,
.institution-logos .logo-salk img,
.institution-logos .logo-ucsd img {
  height: clamp(52px, 8.5vw, 88px);
}

.venue {
  color: var(--muted);
  font-style: italic;
  margin: 0.5rem 0 1.5rem;
  font-size: clamp(0.9rem, 1.6vw, 1.2rem);
}

.links {
  margin-top: 1.25rem;
  gap: 0.5rem;
}
.links li a {
  display: inline-flex;
  align-items: center;
  gap: clamp(0.35rem, 0.7vw, 0.55rem);
  padding: clamp(0.4rem, 0.8vw, 0.6rem) clamp(0.8rem, 1.6vw, 1.2rem);
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: clamp(0.9rem, 1.3vw, 1.1rem);
}

.links .icon {
  width: 1.15em;
  height: 1.15em;
  fill: currentColor;
}
.links li a:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  text-decoration: none;
}

section {
  margin: 3rem 0;
}

section h2 {
  font-size: 2rem;
  margin: 0 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

.paper-heading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-bottom: 1.5rem;
}

.paper-logo {
  width: clamp(260px, 70vw, 800px);
  height: auto;
  margin-bottom: -0.5rem;
}

.paper-heading .paper-title {
  margin: 0;
  text-align: center;
  font-size: clamp(1.5rem, 4.5vw, 3rem);
  line-height: 1.15;
}

@media (min-width: 900px) {
  .paper-heading .paper-title {
    white-space: nowrap;
  }
}

figure {
  margin: 1.5rem 0;
  text-align: center;
}

figure img,
figure object,
figure video {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

#overview figure img {
  width: 100%;
  max-width: 850px;
}

#results figure video {
  width: 100%;
  max-width: 700px;
}

#locomotion figure video,
#baselines-forage-fig video {
  width: 100%;
  max-width: 1000px;
}

#results #motionprior-fig video,
#rear-fig video {
  width: 100%;
  max-width: 1250px;
  height: auto;
  margin: 0 auto;
  display: block;
}

#abstract p {
  font-size: 1.1rem;
}

figcaption {
  margin-top: 0.75rem;
  font-size: 1.1rem;
  color: var(--muted);
  text-align: center;
}

pre {
  background: #f6f6f6;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.85rem;
}

code { font-family: "SF Mono", Menlo, Consolas, monospace; }

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.supp-header { text-align: center; margin-bottom: 2rem; }
.back-link { text-align: left; margin: 1.5rem 0 1rem; }

.supp-group figure video {
  width: 100%;
  max-width: 1000px;
}