:root {
  --ink: #1a1a1a;
  --muted: #5f6368;
  --line: #dedede;
  --soft: #f6f6f4;
  --link: #1d5fbf;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--link); }

:focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }

.page {
  width: min(100% - 40px, 960px);
  margin: 0 auto;
}

.hero {
  padding: 80px 0 44px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

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

h1 {
  max-width: 900px;
  margin: 0 auto;
  font-family: var(--serif);
  font-size: clamp(1.85rem, 3.5vw, 2.45rem);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.authors {
  margin-top: 20px;
  color: #2166e8;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.65;
}

.authors sup,
.affiliations sup,
.author-notes sup {
  font-size: 0.72em;
  line-height: 0;
}

.authors sup {
  color: #202020;
  font-weight: 400;
}

.authors a,
.authors a:visited,
.authors a:hover,
.authors a:focus {
  color: inherit;
  text-decoration: none;
}

.affiliations {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 15px;
  margin-top: 11px;
  color: #202020;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.45;
}

.affiliations span { white-space: nowrap; }

.author-notes {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.8rem;
}

.links {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 21px;
}

.links a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 17px;
  color: #fff;
  background: #1f2b40;
  border-radius: 10px;
  box-shadow: 0 3px 7px rgba(25, 36, 55, 0.14);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.18s ease, transform 0.18s ease;
}

.links a:hover { background: #101a2b; transform: translateY(-1px); }

.paper-icon {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.icon {
  display: inline-flex;
  align-items: center;
  font-size: 1rem;
  line-height: 1;
}

section { padding-top: 48px; }

h2 {
  margin-bottom: 18px;
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 700;
}

.video-card {
  overflow: hidden;
  background: #f3f4f5;
  border: 1px solid #d9dcdf;
  border-radius: 12px;
  box-shadow: 0 5px 16px rgba(20, 27, 36, 0.035);
}

.project-video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #161616;
}

.abstract {
  font-family: "Times New Roman", Times, serif;
  font-size: 1.06rem;
  line-height: 1.7;
  text-align: justify;
}

.abstract-card {
  padding: 24px 28px;
  background: #f3f4f5;
  border: 1px solid #d9dcdf;
  border-radius: 12px;
  box-shadow: 0 5px 16px rgba(20, 27, 36, 0.035);
}

footer {
  width: min(100% - 40px, 960px);
  margin: 58px auto 0;
  padding: 22px 0 32px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

@media (max-width: 700px) {
  .page,
  footer { width: min(100% - 32px, 960px); }

  .hero { padding: 52px 0 34px; }

  section { padding-top: 38px; }

  .abstract { text-align: left; }

  .affiliations { flex-wrap: wrap; gap: 4px 12px; }

}

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