:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #5c5c5c;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --border: #e5e2dc;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.04);
  --radius: 10px;
  --max-width: 920px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --font-display: "IBM Plex Serif", Georgia, serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

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

.container {
  width: min(var(--max-width), 92vw);
  margin: 0 auto;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 246, 243, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  gap: 1rem;
}

.nav-brand {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-brand:hover { text-decoration: none; color: var(--accent); }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.page-header {
  text-align: center;
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.venue {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 1.25rem;
  color: var(--text);
}

.authors {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.authors a { color: var(--text); font-weight: 500; }
.authors a:hover { color: var(--accent); }

.affiliations {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.equal-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.btn-link:hover {
  text-decoration: none;
  border-color: var(--accent);
  box-shadow: var(--shadow);
  color: var(--accent);
}

.btn-link svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

section {
  padding: 3rem 0;
}

section.alt {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-soft);
}

.text-block {
  text-align: justify;
  color: var(--text);
}

.text-block p { margin: 0 0 1rem; }
.text-block p:last-child { margin-bottom: 0; }

.teaser {
  padding: 2.5rem 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.teaser img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.caption {
  margin-top: 0.85rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
  text-align: center;
}

.caption strong { color: var(--text); }

.models-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.models-column h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 0.65rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

.models-column ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.models-column li { margin-bottom: 0.35rem; }

.content-list {
  margin: 0;
  padding-left: 1.25rem;
}

.content-list li {
  margin-bottom: 0.85rem;
  color: var(--text-muted);
}

.content-list strong { color: var(--text); }

.figure-item {
  margin-bottom: 2.5rem;
}

.figure-item:last-child { margin-bottom: 0; }

.figure-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.figure-item.portrait img {
  max-width: 520px;
  margin: 0 auto;
}

.table-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  align-items: start;
}

.table-row .figure-item {
  margin-bottom: 0;
}

.table-row .figure-item img {
  object-fit: contain;
}

.poster-section { text-align: center; }

.poster-thumb {
  display: inline-block;
  max-width: 360px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.15s;
}

.poster-thumb:hover { transform: scale(1.02); }

.bibtex-wrap {
  position: relative;
}

.bibtex {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre-wrap;
  margin: 0;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid #555;
  border-radius: 6px;
  background: #333;
  color: #eee;
  font-size: 0.78rem;
  font-family: var(--font);
  cursor: pointer;
}

.copy-btn:hover { background: #444; }

.site-footer {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

.site-footer a { color: var(--text); }
.site-footer p { margin: 0.35rem 0; }

@media (max-width: 720px) {
  .nav-links { display: none; }
  .models-grid { grid-template-columns: 1fr; }
  .table-row { grid-template-columns: 1fr; }
  .page-header { padding: 2.5rem 0 2rem; }
}