body {
  margin: 0;
  background: radial-gradient(circle at top, #222, #000);
  color: #fff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Hero */
.hero {
  text-align: center;
  padding: 70px 20px 30px;
}

.title {
  font-size: 52px;
  font-weight: 700;
}

.link-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.link-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 16px;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.link-button:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-1px);
}

.abstract {
  max-width: 1100px;
  margin: 60px auto 30px;
  padding: 0 20px;
  font-size: 20px;
  line-height: 1.55;
  font-weight: 400;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Georgia", serif;
  opacity: 0.9;
}

.abstract h3 {
  text-align: center;
  margin: 0 0 22px;
  font-size: 30px;
  font-weight: 600;
}

.abstract p {
  margin: 0;
  text-align: justify;
  text-justify: inter-word;
}

/* Section title */
.section-title {
  max-width: 1700px;
  margin: 70px auto 20px;
  padding-left: 20px;
  font-size: 28px;
  opacity: 0.9;
}

.subtitle {
  max-width: 1700px;
  margin: 70px auto 20px;
  padding-left: 20px;
  font-size: 20px;
  opacity: 0.9;
}

/* Grid */
.gallery {
  max-width: 1700px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
}

.gallery-eb5 {
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  padding-bottom: 80px;
}

.gallery-videoar {
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  padding-bottom: 80px;
}

.bibtex {
  max-width: 1700px;
  margin: 40px auto 100px;
  padding: 0 20px;
}

.bibtex .section-title {
  text-align: center;
}

.bibtex pre {
  margin: 20px 0 0;
  padding: 24px 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}

.bibtex code {
  color: #f2f2f2;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.license {
  max-width: 1700px;
  margin: 20px auto 80px;
  padding: 0 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
  font-size: 18px;
}

.license p {
  margin: 8px 0;
}

.license a {
  color: #7fb1ff;
  text-decoration: none;
}

.license a:hover {
  text-decoration: underline;
}
/* Card */
.video-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #111;
  box-shadow: 0 25px 70px rgba(0,0,0,.6);
  transition: transform .35s ease, box-shadow .35s ease;
}

.video-card:hover {
  transform: scale(1.05);
  box-shadow: 0 40px 100px rgba(0,0,0,.9);
}

.video-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Responsive */
@media (max-width: 1400px) {
  .gallery-eb5 { grid-template-columns: repeat(2, 1fr); }
  .gallery-videoar { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .gallery-eb5,
  .gallery-videoar { grid-template-columns: repeat(2, 1fr); }
}