:root {
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --accent: #0ea5e9;
  --teal: #0f766e;
  --ours: #e8f4f8;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-light: #94a3b8;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-accent: #f1f5f9;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;
  --shadow-sm: 0 1px 2px 0 rgb(15 23 42 / 0.06);
  --shadow-md: 0 4px 12px -2px rgb(15 23 42 / 0.08);
  --shadow-lg: 0 14px 32px -8px rgb(15 23 42 / 0.16);
  --radius: 12px;
  --radius-lg: 16px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.title, .subtitle { font-family: 'Inter', sans-serif; color: var(--text-primary); }

/* ---------- Publication header ---------- */
.publication-header { padding-top: 2rem; }
.publication-header .hero-body { padding: 4.5rem 1.5rem 3.5rem; }

.publication-title {
  font-weight: 800 !important;
  font-size: clamp(1.85rem, 4.2vw, 2.85rem) !important;
  line-height: 1.15 !important;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem !important;
}

.insertfuse {
  background: linear-gradient(135deg, #1d4ed8 0%, #0ea5e9 50%, #0f766e 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-ligatures: none;
}

.publication-venue {
  margin: 0.5rem 0 1.75rem;
  color: var(--text-primary);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.publication-venue .venue-tag {
  color: var(--primary);
  font-weight: 800;
}

.publication-authors {
  margin: 0.5rem auto 1rem;
  max-width: 980px;
  line-height: 1.85;
  font-weight: 500;
}

.author-block {
  display: inline-block;
  margin: 0 0.3rem;
  white-space: nowrap;
}

.author-block sup { font-size: 0.65em; color: var(--text-secondary); }

.publication-affiliations {
  max-width: 940px;
  margin: 0.4rem auto 0.6rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.affil-block {
  display: inline-block;
  margin: 0 0.55rem;
  white-space: nowrap;
}

.eql-cntrb {
  margin: 0.5rem 0 0;
  color: var(--text-light);
  font-size: 0.85rem;
  font-style: italic;
}

.publication-links { margin-top: 1.75rem; }
.publication-links .link-block { display: inline-block; }
.publication-links .link-block a { margin: 6px 5px; }

.button.is-dark {
  background: var(--text-primary) !important;
  border: none !important;
  color: #fff !important;
  border-radius: 999px !important;
  font-weight: 600 !important;
  padding: 0.5rem 1.15rem !important;
  letter-spacing: 0.01em;
  box-shadow: var(--shadow-sm);
  transition: var(--transition) !important;
}

.button.is-dark:hover {
  background: var(--primary) !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button.is-dark:active { transform: translateY(0); }

.button.is-dark.is-static {
  opacity: 0.55 !important;
  cursor: default !important;
  pointer-events: none !important;
  box-shadow: none !important;
  transform: none !important;
}

.button.is-dark.is-static:hover {
  background: var(--text-primary) !important;
  transform: none !important;
  box-shadow: none !important;
}

/* ---------- Sections ---------- */
.section { padding: 4.5rem 1.5rem; }
.section.hero.is-light,
.section.tinted {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.title.is-3 {
  font-weight: 700 !important;
  font-size: 2rem !important;
  letter-spacing: -0.015em;
  margin-bottom: 1rem !important;
  padding-bottom: 1rem;
  position: relative;
}

.title.is-3::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 56px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.section-lead {
  max-width: 780px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.section-lead strong { color: var(--text-primary); }

.content.has-text-justified {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.content.has-text-justified p { margin-bottom: 1.25rem; }
.content.has-text-justified strong { color: var(--text-primary); font-weight: 600; }

/* ---------- Highlights / feature cards ---------- */
.highlight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 0.5rem;
}

.highlight-card {
  padding: 1.5rem 1.6rem 1.55rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.highlight-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: #bfdbfe;
}

.highlight-card .idea-head {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 0.75rem;
}

.highlight-card .icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, #dbeafe, #e0f2fe);
  color: var(--primary);
  font-size: 1rem;
  margin-bottom: 0;
}

.highlight-card .idea-title-wrap { min-width: 0; }

.highlight-card .idea-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  background: #eff6ff;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  margin-bottom: 0.35rem;
}

.highlight-card h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.highlight-card p {
  margin: 0 0 0.85rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

.highlight-card p:last-child { margin-bottom: 0; }

.formula-block {
  margin: 0.15rem 0 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow-x: auto;
  text-align: center;
}

.formula-block .katex-display {
  margin: 0.35rem 0 !important;
  overflow-x: auto;
  overflow-y: hidden;
}

.formula-block .katex {
  font-size: 1.02em;
}

.formula-note {
  margin: 0 !important;
  font-size: 0.84rem !important;
  color: var(--text-light) !important;
  line-height: 1.55 !important;
}

.formula-note code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88em;
  background: var(--bg-accent);
  padding: 0.08em 0.32em;
  border-radius: 4px;
  color: var(--text-primary);
}

/* Two-column layout for TAGC / RBFM pair inside one card */
.idea-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 0.15rem;
}

.idea-split-item {
  padding: 0.85rem 0.95rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

.idea-split-item h4 {
  margin: 0 0 0.45rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

.idea-split-item .formula-block {
  margin: 0.35rem 0 0.5rem;
  padding: 0.65rem 0.7rem;
  background: var(--bg-primary);
}

.idea-split-item p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ---------- Stats strip ---------- */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 2rem 0 0.5rem;
}

.stat-card {
  text-align: center;
  padding: 1.15rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stat-card .stat-value {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-card .stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.stat-card .stat-sub {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.72rem;
  color: var(--text-light);
}

/* ---------- Paper figure ---------- */
.paper-figure {
  margin: 1.5rem 0 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.paper-figure img {
  display: block;
  width: 100%;
  height: auto;
  background: #fff;
}

.paper-figure figcaption {
  padding: 1rem 1.25rem 1.1rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.55;
}

.paper-figure figcaption strong { color: var(--text-primary); }
.paper-figure + .paper-figure { margin-top: 1.5rem; }

/* ---------- Method steps ---------- */
.method-steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 1.75rem;
}

.method-step {
  padding: 1.4rem 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.method-step .step-num {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  background: #eff6ff;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.7rem;
}

.method-step h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.method-step p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.65;
}

.method-step code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: var(--bg-accent);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  color: var(--text-primary);
}

/* ---------- Results table ---------- */
.table-wrap {
  margin-top: 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  background: var(--bg-primary);
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  min-width: 780px;
}

.results-table thead th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  padding: 0.7rem 0.55rem;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  white-space: nowrap;
}

.results-table thead th:first-child,
.results-table tbody td:first-child {
  text-align: left;
  padding-left: 1rem;
  position: sticky;
  left: 0;
  background: inherit;
  z-index: 1;
}

.results-table tbody td {
  padding: 0.55rem 0.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
}

.results-table tbody td:first-child {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  background: var(--bg-primary);
}

.results-table tbody tr:last-child td { border-bottom: none; }

.results-table tr.section-row td {
  background: var(--bg-accent) !important;
  font-family: 'Inter', sans-serif !important;
  font-weight: 700 !important;
  font-style: italic;
  color: var(--text-secondary) !important;
  text-align: left !important;
  padding: 0.55rem 1rem !important;
  font-size: 0.8rem;
}

.results-table tr.ours td {
  background: var(--ours);
  font-weight: 700;
  color: var(--text-primary);
}

.results-table tr.ours td:first-child {
  background: var(--ours);
  font-weight: 700;
}

.results-table .best {
  font-weight: 800;
  color: var(--primary);
}

.results-table .second {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.table-note {
  margin: 0.85rem 0 0;
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
}

/* ---------- Ablation mini metrics ---------- */
.result-tables {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 1.75rem;
}

.result-table-card {
  padding: 1.5rem 1.6rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.result-table-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.result-table-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.result-table-card p {
  margin: 0 0 1rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.metric-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.metric-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.92rem;
}

.metric-list li:last-child { border-bottom: none; }

.metric-list span {
  color: var(--text-secondary);
  font-weight: 500;
}

.metric-list strong {
  color: var(--primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

/* ---------- BibTeX ---------- */
.bibtex-card {
  position: relative;
  margin-top: 1.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid #1e293b;
}

.bibtex-card pre {
  margin: 0 !important;
  padding: 1.6rem 1.8rem !important;
  background: #0f172a !important;
  color: #e2e8f0 !important;
  font-family: 'JetBrains Mono', 'SF Mono', monospace !important;
  font-size: 0.9rem !important;
  line-height: 1.7;
  overflow-x: auto;
}

.bibtex-card code {
  background: transparent !important;
  color: inherit !important;
  padding: 0 !important;
  font-family: inherit !important;
}

.copy-bibtex-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  background: rgba(255, 255, 255, 0.1);
  color: #f1f5f9;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  backdrop-filter: blur(8px);
}

.copy-bibtex-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.4);
}

.copy-bibtex-btn.copied {
  background: #10b981;
  border-color: #10b981;
  color: #fff;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 1.5rem;
  color: var(--text-secondary);
}

.footer .content { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }
.footer a { color: var(--primary); transition: var(--transition); }
.footer a:hover { color: var(--primary-hover); }

/* ---------- Scroll to top ---------- */
.scroll-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--text-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.scroll-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-to-top:hover { background: var(--primary); transform: translateY(-3px); }

/* ---------- Responsive ---------- */
@media screen and (max-width: 960px) {
  .highlight-grid { grid-template-columns: 1fr; }
  .idea-split { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .method-steps { grid-template-columns: 1fr; }
  .result-tables { grid-template-columns: 1fr; }
}

@media screen and (max-width: 640px) {
  .publication-header .hero-body { padding: 2.5rem 1rem 2rem; }
  .publication-title { font-size: 1.55rem !important; }
  .section { padding: 3rem 1rem; }
  .title.is-3 { font-size: 1.55rem !important; }
  .section-lead { font-size: 0.95rem; }
  .author-block { white-space: normal; }
  .affil-block { display: block; margin: 0.15rem 0; }
  .copy-bibtex-btn { top: 10px; right: 10px; padding: 0.4rem 0.7rem; font-size: 0.78rem; }
  .bibtex-card pre { font-size: 0.78rem !important; padding: 1.1rem !important; }
  .scroll-to-top { right: 1rem; bottom: 1rem; }
  .stat-card .stat-value { font-size: 1.2rem; }
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero, .section { animation: fadeInUp 0.55s ease-out; }

button:focus-visible, a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}