:root {
  --primary: #f97316;
  --primary-dark: #c2410c;
  --accent: #dc2626;
  --bg-light: #fcf9f6;
  --bg-white: #ffffff;
  --text-dark: #271c14;
  --text-body: #5c4f43;
  --text-muted: #a8988a;
  --border: #f0e8e0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 20px;
}

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

body {
  font-family: 'Noto Sans', 'Google Sans', system-ui, sans-serif;
  color: var(--text-body);
  background: var(--bg-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.container.wide {
  max-width: 1400px;
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, #fff1e4 0%, #fffaf4 50%, #fff5ea 100%);
  padding: 80px 0 48px;
  text-align: center;
}

.publication-title {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 8px;
}

.publication-title .highlight {
  background: linear-gradient(135deg, var(--primary), #dc2626);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.conference-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0;
}

.conference-badge .venue {
  background: var(--text-dark);
  color: #fff;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.conference-badge .status {
  background: var(--primary);
  color: #fff;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.authors-list {
  margin: 20px 0 6px;
  font-size: 1.05rem;
}

.authors-names {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25em 2.5em;
}

.authors-list a {
  color: inherit;
  text-decoration: none;
}

.authors-list a:hover {
  text-decoration: underline;
}

.authors-affiliation {
  margin-top: 6px;
}

.authors-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.link-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 8px;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 2px solid var(--border);
  color: var(--text-dark);
  background: var(--bg-white);
}

.link-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.link-btn.primary {
  background: var(--text-dark);
  color: #fff;
  border-color: var(--text-dark);
}

.link-btn.primary:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.link-btn svg {
  width: 18px;
  height: 18px;
}

.link-btn.disabled {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

.tldr-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  margin: 28px auto 0;
  max-width: 900px;
  font-size: 0.95rem;
  color: var(--text-body);
  box-shadow: var(--shadow-sm);
}

.tldr-card strong {
  color: var(--primary-dark);
}

/* Egocentric RGB example strip */
.ego-strip {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin: 32px auto 0;
  max-width: 1000px;
}

.ego-group {
  flex: 1;
  min-width: 280px;
  max-width: 460px;
}

.ego-frames {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.ego-frames img {
  width: 100%;
  display: block;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.ego-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin-top: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
}

.ego-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.ego-dot.src { background: var(--primary); }
.ego-dot.ref { background: #6b7280; }

/* Sections */
.content-section {
  padding: 56px 0;
}

.content-section:nth-child(odd) {
  background: var(--bg-white);
}

.content-section:nth-child(even) {
  background: var(--bg-light);
}

.section-title {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 24px;
  text-align: center;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: -16px;
  margin-bottom: 28px;
}

.abstract-text {
  font-size: 1.02rem;
  line-height: 1.8;
  max-width: 1000px;
  margin: 0 auto;
  text-align: justify;
}

.method-name {
  font-weight: 700;
  color: var(--primary-dark);
}

/* Figures */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.method-figure {
  margin: 32px auto;
  max-width: 100%;
  text-align: center;
}

.method-figure img {
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  background: #fff;
  padding: 12px;
}

.method-figure .caption {
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

/* Placeholder boxes (to be replaced with real figures/videos) */
.placeholder-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  min-height: 320px;
  border: 2px dashed #f3c9a8;
  border-radius: var(--radius-lg);
  background: repeating-linear-gradient(
    -45deg,
    #fffaf4,
    #fffaf4 14px,
    #fef3e7 14px,
    #fef3e7 28px
  );
  color: var(--primary-dark);
  text-align: center;
  padding: 32px;
}

.placeholder-box i {
  font-size: 2rem;
  opacity: 0.7;
}

.placeholder-box .ph-title {
  font-weight: 700;
  font-size: 1rem;
}

.placeholder-box .ph-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 560px;
}

.placeholder-box.short { min-height: 220px; }
.placeholder-box.tall { min-height: 420px; }

/* Two-up figure layout */
.figure-two-up {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  align-items: start;
  margin: 32px 0;
}

.figure-two-up .method-figure {
  margin: 0;
}

@media (max-width: 768px) {
  .figure-two-up {
    grid-template-columns: 1fr;
  }
}

/* Method pipeline */
.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.pipeline-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.pipeline-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.pipeline-card h3 {
  font-size: 1.05rem;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.pipeline-card p {
  font-size: 0.9rem;
  color: var(--text-body);
}

.pipeline-card .pipeline-models {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pipeline-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary-dark);
  background: #fef0e2;
  border: 1px solid #f8dcc2;
  padding: 2px 10px;
  border-radius: 20px;
}

/* Results Table */
.results-table-wrapper {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--bg-white);
}

.results-table thead th {
  background: var(--text-dark);
  color: #fff;
  padding: 12px 16px;
  text-align: center;
  font-weight: 600;
  white-space: nowrap;
}

.results-table thead th.group {
  background: #3b2c1f;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.results-table tbody td {
  padding: 10px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.results-table tbody tr:hover {
  background: #fff7ee;
}

.results-table .best {
  font-weight: 700;
  color: var(--primary-dark);
}

.results-table .second {
  font-weight: 600;
  color: var(--primary);
  text-decoration: underline;
}

.results-table .method-col {
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
  white-space: nowrap;
}

.results-table .ours {
  background: #fff3e6;
}

.results-table .fail {
  color: var(--text-muted);
  font-style: italic;
}

.table-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: -12px;
  margin-bottom: 8px;
}

/* Key Findings */
.findings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.finding-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.finding-card .metric {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.finding-card .metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.finding-card .metric-desc {
  font-size: 0.9rem;
  color: var(--text-body);
}

/* Baseline-vs-Ours comparison cards */
.baseline-comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.baseline-comparison-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.baseline-comparison-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 2px;
}

.baseline-comparison-card-title .card-kw {
  color: var(--primary);
  font-weight: 800;
}

.baseline-comparison-card-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.comparison-metric {
  margin-bottom: 14px;
}

.comparison-metric:last-child {
  margin-bottom: 0;
}

.comparison-metric-name {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.comparison-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
  font-size: 0.82rem;
}

.comparison-row.ours .comparison-val {
  font-weight: 700;
  color: var(--primary-dark);
}

.comparison-label-ours {
  color: var(--primary-dark);
  font-weight: 700;
}

.comparison-label {
  flex: 0 0 92px;
  color: var(--text-body);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.comparison-bar-wrap {
  flex: 1;
  min-width: 0;
  height: 10px;
  background: var(--border);
  border-radius: 5px;
  overflow: hidden;
}

.comparison-bar {
  height: 100%;
  border-radius: 5px;
  transition: width 0.3s ease;
}

.comparison-bar.baseline {
  background: #d9cfc5;
}

.comparison-bar.prose {
  background: var(--primary);
}

.comparison-bar-wrap.inv {
  display: flex;
  justify-content: flex-end;
}

.comparison-val-wrap {
  flex: 0 0 60px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
}

.comparison-val {
  font-variant-numeric: tabular-nums;
}

.comparison-row > .comparison-val {
  flex: 0 0 60px;
  text-align: right;
}

.comparison-improve {
  font-size: 0.7rem;
  font-weight: 600;
  color: #16a34a;
}

/* Registration comparison viewers */
.dataset-example-panels {
  position: relative;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 28px 0 0;
}

.comparison-col-label {
  text-align: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-dark);
  padding: 8px 0;
}

.comparison-col-label-ours {
  color: var(--primary-dark);
}

.comparison-viewer {
  position: relative;
  width: 100%;
  height: 260px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fafafa;
  border: 1px solid var(--border);
}

.comparison-viewer canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.viewer-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.sample-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.view-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.toggle-btn {
  padding: 6px 14px;
  border: none;
  background: var(--bg-white);
  color: var(--text-body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.toggle-btn:not(:last-child) {
  border-right: 1px solid var(--border);
}

.toggle-btn:hover {
  color: var(--primary);
}

.toggle-btn.active {
  background: var(--primary);
  color: #fff;
}

.sample-btn {
  padding: 6px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-white);
  color: var(--text-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  min-width: 36px;
}

.sample-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.sample-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.cloud-legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-body);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend-dot {
  display: inline-block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-dot.ref { background: #6b7280; }
.legend-dot.src { background: var(--primary); }

.viewer-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 10px;
  font-style: italic;
}

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

@media (max-width: 480px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

/* Ablation two-up layout */
.ablation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 28px;
  align-items: start;
}

.ablation-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.ablation-card h3 {
  font-size: 1.05rem;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.ablation-card .ablation-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.ablation-card .results-table-wrapper {
  margin: 0;
  box-shadow: none;
}

@media (max-width: 900px) {
  .ablation-grid {
    grid-template-columns: 1fr;
  }
}

/* BibTeX */
.bibtex-wrapper {
  position: relative;
  background: var(--text-dark);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px auto;
  max-width: 960px;
}

.bibtex-code {
  padding: 20px 24px;
  color: #f3ece4;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: rgba(255,255,255,0.2);
}

/* Footer */
.footer-section {
  padding: 32px 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-light);
  border-top: 1px solid var(--border);
}

.footer-section a {
  color: var(--primary-dark);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
  .publication-title {
    font-size: 1.8rem;
  }
  .hero-section {
    padding: 48px 0 32px;
  }
  .container {
    padding: 0 16px;
  }
}

@media (max-width: 480px) {
  .publication-title {
    font-size: 1.5rem;
  }
}