*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #0d7a6e;
  --primary-dark: #0a6159;
  --accent: #2563c8;
  --text: #1e293b;
  --text-light: #64748b;
  --bg: #ffffff;
  --bg-alt: #f4fbf9;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --radius: 12px;
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans', 'Segoe UI', sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
}

/* ── Layout ─────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header ─────────────────────────────── */
.header {
  padding: 64px 0 48px;
  text-align: center;
  background: linear-gradient(160deg, #edfaf6 0%, #fafafa 100%);
  border-bottom: 1px solid var(--border);
}

.venue-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 6px 20px;
  border-radius: 999px;
  letter-spacing: 0.08em;
  margin-top: 20px;
  margin-bottom: 20px;
}

.title {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 12px;
}

.model-name {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.authors {
  font-size: 1rem;
  margin: 20px 0 8px;
  color: var(--text);
}

.authors a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}
.authors a:hover { text-decoration: underline; }

.affiliation {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.affiliation sup {
  font-size: 0.7em;
  vertical-align: super;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--border);
  color: var(--text);
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-color: transparent;
}

/* ── Sections ────────────────────────────── */
.section {
  padding: 64px 0;
  animation: fadeInUp 0.6s ease both;
}
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  position: relative;
  color: var(--text);
}
.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  margin: 10px auto 0;
}

/* ── Video ───────────────────────────────── */
.video-container {
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
}
.video-container video,
.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ── Images ──────────────────────────────── */
.result-image {
  display: block;
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 0 auto;
}
.result-image.medium { max-width: 700px; }
.result-image.large  { max-width: 900px; }
.result-image.small  { max-width: 500px; }

/* Teaser: white background, no border/shadow */
.teaser-wrap { background: #fff; }
.teaser-img {
  border-radius: 0 !important;
  box-shadow: none !important;
  background: #fff;
}

.image-caption {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 14px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.image-wrap {
  text-align: center;
  margin-bottom: 32px;
}

/* ── Abstract ────────────────────────────── */
.abstract-text {
  max-width: 820px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

/* ── Method items ────────────────────────── */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 36px;
}

.method-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: transform var(--transition), box-shadow var(--transition);
}
.method-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.10);
}

.method-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.method-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ── Key Contributions ───────────────────── */
.contribution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.contribution-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.contribution-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.4rem;
}
.contribution-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.contribution-item p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ── PRISM Video Player ──────────────────── */
.prism-player {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}
.prism-viewport {
  flex: 1;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.prism-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.prism-slide {
  flex: 0 0 100%;
  width: 100%;
  position: relative;
}
.prism-video {
  width: 100%;
  display: block;
}
.prism-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.prism-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1;
  cursor: pointer;
  transition: background var(--transition);
}
.prism-dot.active { background: var(--primary); }

/* Slide label overlay */
.slide-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 16px;
  background: rgba(0,0,0,0.45);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  backdrop-filter: blur(2px);
}
.prism-nav {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.prism-nav:hover {
  background: var(--primary);
  color: #fff;
  transform: scale(1.08);
}

/* ── Tables ──────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.results-table th {
  background: #94a3b8;
  color: #fff;
  padding: 12px 14px;
  text-align: center;
  white-space: nowrap;
  font-weight: 600;
}
.results-table td {
  padding: 10px 14px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: #fff;
}
.results-table .method-row-header td {
  background: #fff;
  border-top: 2px solid #94a3b8;
}
.results-table .dataset-label {
  background: #94a3b8 !important;
  color: #fff !important;
  font-weight: 700;
  vertical-align: middle;
}
.results-table .method-row-header .dataset-label {
  border-top: 2px solid rgba(255,255,255,0.6) !important;
}
.results-table .our-method td {
  background: linear-gradient(90deg, rgba(13,122,110,0.07) 0%, rgba(37,99,200,0.06) 100%);
}
.best { font-weight: 700; }
.second { text-decoration: underline; }

/* ── BibTeX ──────────────────────────────── */
.bibtex-wrap {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
}
.bibtex-wrap pre {
  background: #1e293b;
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 24px 28px;
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
}
.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.copy-btn:hover { background: var(--primary-dark); }

/* ── Footer ──────────────────────────────── */
.footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 0.85rem;
  color: var(--text-light);
  border-top: 1px solid var(--border);
}
.footer a { color: var(--primary); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ── Two-column result layout ────────────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

/* ── Animations ──────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 768px) {
  .header { padding: 40px 0 32px; }
  .section { padding: 48px 0; }
  .two-col { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .contribution-grid { grid-template-columns: 1fr; }
  .title { font-size: clamp(20px, 5vw, 30px); }
}