/* Page-specific styles on top of the Academic Project Page Template.
   Colors follow the paper figures: blue for VLAs, orange for k-NN. */
:root {
  --primary-color: #2a78d6;
  --primary-hover: #1f62b4;
  --knn-color: #eb6834;     /* chart marks */
  --knn-text: #c4501d;      /* orange text accent, darker for legibility */
  --knn-tint: #fdf1ea;
  --vla-color: #2a78d6;
  --grid-color: #e5e7eb;
}

.knn {
  color: var(--knn-text);
}

/* Header */
.publication-affiliations {
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.publication-venue {
  margin: 0.75rem 0 1.5rem;
  font-weight: 600;
}

/* Bulma's .hero is a flex column and .container has auto margins, which disables stretching:
   without an explicit width, wide content widens the whole section on phones */
.hero > .container {
  width: 100%;
}

/* Section headings are centered so the template's centered accent bar sits under them */
.section .title.is-3 {
  text-align: center;
}

.title.is-3::after {
  background: var(--knn-color);
}

.lead {
  font-size: 1.15rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 1.5rem;
}

.lead p + p {
  margin-top: 0.9rem;
}

/* Teaser */
.teaser-caption {
  margin: 1.25rem auto 0;
  max-width: 640px;
  text-align: center;
  font-size: 1.15rem;
  color: var(--text-secondary);
}

/* Figures */
.paper-figure {
  margin: 1.25rem auto 0;
  text-align: center;
}

.paper-figure img {
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  background: #fff;
  border-radius: 8px;
  padding: 0.5rem;
}

.paper-figure.is-medium img {
  max-width: 720px;
}

/* The caption block is centered under the figure, its lines left-aligned (captions with <br> line breaks) */
.paper-figure figcaption {
  display: table;
  margin: 0.6rem auto 0;
  text-align: left;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* Findings */
.finding {
  margin: 0 auto 3.5rem;
}

.finding:last-child {
  margin-bottom: 0;
}

.finding-title {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.finding-num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--knn-tint);
  color: var(--knn-text);
  font-size: 1rem;
  font-weight: 800;
  transform: translateY(-0.1rem);
}

.finding > p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-left: 2.75rem;
}

.finding > p + p {
  margin-top: 0.6rem;
}

/* Dumbbell chart: LIBERO (ring) to LIBERO-Plus (dot), one row per policy */
.dumbbell {
  position: relative;
  margin-top: 1.25rem;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem 1.25rem 0.75rem;
}

.db-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.chart-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem 1rem;
}

.chart-toggle {
  display: inline-flex;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.chart-toggle button {
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border: none;
  background: #fff;
  color: var(--text-secondary);
  cursor: pointer;
}

.chart-toggle button + button {
  border-left: 1px solid var(--border-color);
}

.chart-toggle button.is-active {
  background: var(--text-primary);
  color: #fff;
}

.chart-note {
  font-size: 0.9rem !important;
  margin-top: 0.6rem;
}

.db-key {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.db-swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-sizing: border-box;
}

.db-swatch.is-ring {
  border: 2px solid var(--text-secondary);
  background: #fff;
}

.db-swatch.is-filled {
  background: var(--text-secondary);
}

.db-swatch.is-ring.is-knn { border-color: var(--knn-color); }
.db-swatch.is-filled.is-knn { background: var(--knn-color); }

.db-swatch.is-diamond {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--vla-color);
  transform: rotate(45deg);
}

.db-chip {
  width: 14px;
  height: 4px;
  border-radius: 2px;
}

.db-chip.is-knn { background: var(--knn-color); }
.db-chip.is-vla { background: var(--vla-color); }

.db-head,
.db-row,
.db-axis {
  display: grid;
  grid-template-columns: 9.5rem 1fr 3.5rem;
  column-gap: 0.75rem;
  align-items: center;
}

.db-head {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-bottom: 0.25rem;
}

.db-head span {
  white-space: nowrap;
}

.db-head span:last-child {
  text-align: right;
}

.db-row {
  height: 30px;
  border-radius: 6px;
  cursor: default;
  outline: none;
}

.db-row:hover,
.db-row:focus-visible {
  background: var(--background-accent);
}

.db-row:focus-visible {
  box-shadow: 0 0 0 2px var(--primary-color);
}

.db-name {
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-left: 0.25rem;
}

.db-row.is-knn .db-name {
  font-weight: 700;
}

.db-track {
  position: relative;
  height: 100%;
  background-image: linear-gradient(to right, var(--grid-color) 1px, transparent 1px);
  background-size: 25% 100%;
  border-right: 1px solid var(--grid-color);
}

.db-line {
  position: absolute;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
  background: currentColor;
  opacity: 0.45;
  border-radius: 1px;
}

.db-dot {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-sizing: border-box;
  box-shadow: 0 0 0 2px #fff;   /* surface ring */
}

.db-dot.is-ring {
  border: 2px solid currentColor;
  background: #fff;
}

.db-dot.is-filled {
  background: currentColor;
}

.db-dot.is-vla-mark {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background: var(--vla-color);
  transform: translate(-50%, -50%) rotate(45deg);
}

.db-row.is-knn .db-track,
.db-row.is-backbone .db-track { color: var(--knn-color); }
.db-row.is-vla .db-track { color: var(--vla-color); }

.db-delta {
  text-align: right;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.db-row.is-best .db-delta {
  color: var(--text-primary);
  font-weight: 700;
}

.db-ticks {
  position: relative;
  height: 1.4rem;
  font-size: 0.75rem;
  color: var(--text-light);
  font-variant-numeric: tabular-nums;
}

.db-ticks span {
  position: absolute;
  top: 0.25rem;
  transform: translateX(-50%);
}

#benchmark-chart .db-head,
#benchmark-chart .db-row,
#benchmark-chart .db-axis {
  grid-template-columns: 9.5rem 1fr 5rem;
}

.db-tooltip {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  background: var(--text-primary);
  color: #fff;
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  font-size: 0.85rem;
  line-height: 1.4;
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
}

.db-tooltip strong {
  color: #fff;
  font-size: 0.95rem;
}

.db-tooltip .tt-name {
  color: #cbd5e1;
}

.facts {
  margin: 0.25rem 0 0 2.75rem;
  list-style: none;
}

.facts li {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-secondary);
  padding-left: 1rem;
  border-left: 3px solid var(--knn-tint);
  margin-bottom: 0.75rem;
}

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

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 0;
}

.card-item {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.card-item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.card-item p {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.cards.variants {
  margin-bottom: 0.25rem;
}

.variant-score {
  float: right;
  font-weight: 800;
  color: var(--knn-text);
}

.variant-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: var(--background-accent);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  margin-bottom: 0.45rem;
}

.variant-tag.is-trained {
  color: var(--knn-text);
  background: var(--knn-tint);
}

.cards.is-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card-item p + p {
  margin-top: 0.5rem;
}

.card-item .card-result {
  color: var(--text-primary);
  font-weight: 600;
}

.takeaway {
  border-left: 4px solid var(--knn-color);
  background: var(--knn-tint);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.1rem;
  margin-top: 1.25rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
}

/* Call to action */
.cta .lead {
  margin-bottom: 1.25rem;
}

/* Method section */
.subsection-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 3rem 0 0.5rem;
}

.section-text {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* Interactive pipeline figure: the zones sit over paths (a) and (b) */
.pipeline-frame {
  background: #fff;
  border-radius: 8px;
  padding: 0.5rem;
}

.pipeline-canvas {
  position: relative;
  line-height: 0;
}

.paper-figure .pipeline-canvas img {
  padding: 0;
  border-radius: 0;
}

.path-zone {
  position: absolute;
  border-radius: 8px;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, backdrop-filter 0.2s ease;
  outline: none;
}

.path-zone:not(.is-part) {
  cursor: pointer;
}

.path-zone.is-part {
  pointer-events: none;
  border-radius: 2px;
}

.pipeline-canvas.focus-knn .path-zone[data-path="vla"],
.pipeline-canvas.focus-vla .path-zone[data-path="knn"] {
  background-color: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: grayscale(1);
  backdrop-filter: grayscale(1);
}

.pipeline-canvas.focus-knn .path-zone[data-path="knn"]:not(.is-part) {
  box-shadow: 0 0 0 3px var(--knn-color);
}

.pipeline-canvas.focus-vla .path-zone[data-path="vla"]:not(.is-part) {
  box-shadow: 0 0 0 3px var(--vla-color);
}

/* Rollout videos */
.video-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
}

.video-grid.is-teaser {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.video-grid video {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: block;
  border-radius: 8px;
  background: #e2e8f0;
}

.rollout-tile {
  margin: 0;
}

.rollout-tile figcaption {
  font-size: 0.8rem;
  line-height: 1.35;
  color: var(--text-secondary);
  margin-top: 0.35rem;
  font-style: italic;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rollout-tile .rate {
  font-style: normal;
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 0.3rem;
}

.suite-panel[hidden] {
  display: none;
}

.suite-tabs {
  margin-bottom: 1.25rem !important;
}

.suite-tabs li span.rate {
  margin-left: 0.4rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.suite-tabs li.is-active a {
  background-color: var(--text-primary) !important;
  border-color: var(--text-primary) !important;
  color: #fff !important;
}

.suite-tabs li.is-active span.rate {
  color: #cbd5e1;
}

pre#bibtex-code {
  white-space: pre-wrap;
  word-break: break-word;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

@media screen and (max-width: 768px) {
  .video-grid,
  .video-grid.is-teaser {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .finding > p,
  .facts {
    margin-left: 0;
  }

  .cards,
  .cards.is-two {
    grid-template-columns: 1fr;
  }

  .finding-title {
    font-size: 1.15rem;
  }

  .dumbbell {
    padding: 0.75rem 0.75rem 0.5rem;
  }

  .db-head,
  .db-row,
  .db-axis {
    grid-template-columns: 6rem 1fr 3rem;
    column-gap: 0.5rem;
  }

  .db-row {
    height: auto;
    min-height: 34px;
  }

  .db-track {
    align-self: stretch;
  }

  /* Long names such as "k-NN (multimodal)" wrap instead of being cut */
  .db-name {
    white-space: normal;
    line-height: 1.15;
    padding: 0.2rem 0 0.2rem 0.25rem;
  }

  .db-name,
  .db-delta {
    font-size: 0.8rem;
  }

  #benchmark-chart .db-head,
  #benchmark-chart .db-row,
  #benchmark-chart .db-axis {
    grid-template-columns: 6rem 1fr 4.4rem;
  }

  #benchmark-chart .db-delta {
    font-size: 0.72rem;
  }
}

@media screen and (max-width: 480px) {
  .suite-tabs li span.rate {
    display: none;
  }
}

/* Bring the rollout teaser up to the title: was 4rem (title bottom) + 2rem (teaser top) */
.title-hero .hero-body {
  padding-bottom: 1rem;
}

.teaser .hero-body {
  padding-top: 0.5rem;
}

/* BibTeX syntax colors: plain spans, so the Copy button (textContent) still copies plain text */
#bibtex-code .bib-type { color: #c4501f; font-weight: 600; }   /* a darker k-NN orange, readable on the light box */
#bibtex-code .bib-key { color: var(--text-secondary); }
#bibtex-code .bib-field { color: #1c5cab; }
#bibtex-code .bib-value { color: var(--text-primary); }