@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,600;0,700;1,400&family=Source+Sans+3:wght@300;400;600;700&display=swap');

/* ── Reset & Base ─────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 1.05rem;
  color: #333333;
  background: #ffffff;
  line-height: 1.75;
}

h1, h2, h3, h4, h5 {
  font-family: 'Noto Serif', serif;
  color: #2c3e6b;
}

a {
  color: #2c3e6b;
  text-decoration: none;
}

a:hover {
  color: #e74c3c;
  text-decoration: underline;
}

/* ── Layout ───────────────────────────────────────────────── */
/* Width matches the horizontal span of the THREE video panels in the demo
   row (lower-left of the robot viewer to lower-right of the GT SMPL viewer):
     content     = 1500 − 64                 = 1436 px
     1fr         = (1436 − 54 gaps) / 3.45fr ≈ 400.6 px
     3-video span = 3 × 400.6 + 2 × 18      ≈ 1238 px
   So 1240 px is the centered "video-row" width used by abstract, teaser,
   method, results, bibtex, and footer. */
.container {
  max-width: 1240px;
}

section {
  padding: 80px 0;
}

section:nth-of-type(even) {
  background: #f8f9fa;
}

.section-heading {
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2c3e6b;
  display: inline-block;
}

/* ══════════════════════════════════════════════════════════
   DEMO — 3-PANEL VIDEO COMPARISON
══════════════════════════════════════════════════════════ */
#demo {
  background: #f8f9fa;
  padding: 30px 0 60px;
}

.demo-container {
  width: 100%;
  max-width: 1500px;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
  box-sizing: border-box;
}

.demo-tldr {
  font-size: 1.08rem;
  line-height: 1.6;
  color: #444;
  margin: 0 auto 1rem;
  max-width: 100%;
  text-align: left;
}

.demo-tldr-tag {
  display: inline-block;
  font-family: 'Noto Serif', serif;
  font-weight: 700;
  color: #e74c3c;
  letter-spacing: 0.04em;
  margin-right: 0.5rem;
}

/* ── Multi-row demo blocks ───────────────────────────────── */
.demo-block {
  margin-bottom: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid #e5e9f2;
}
.demo-block:last-of-type {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.unveil-kw {
  color: #2c3e6b;
  font-style: normal;
}

/* ── 2-row × 3-col grid ──────────────────────────────────
   Row 1 (auto): column headers — tallest drives row height
   Row 2 (fr):   equal video cards, always start at same Y  */
.demo-panels {
  display: grid;
  grid-template-columns: minmax(130px, 0.45fr) 1fr 1fr 1fr;
  grid-template-rows: auto 1fr auto;
  column-gap: 18px;
  row-gap: 0;
  align-items: end;     /* headers align to bottom → videos flush */
}

/* ── Column headers (row 1) ──────────────────────────────── */
.demo-col-header {
  padding-bottom: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Robot column: center itself in the row height */
.demo-col-header--robot {
  align-self: center;
  padding-bottom: 0;
}

/* ── Robot trajectory labelled box ──────────────────────── */
.robot-traj-box {
  display: inline-block;
  background: #eef2ff;
  border: 1.5px solid #b8c8f0;
  border-radius: 10px;
  padding: 0.65rem 1.2rem;
  font-family: 'Noto Serif', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: #2c3e6b;
  text-align: center;
  line-height: 1.4;
}

/* ── Attr panel — the single box wrapping title + chips ──── */
.attr-panel {
  width: 100%;
  border-radius: 12px;
  padding: 0.85rem 0.75rem 0.8rem;
  box-shadow: 0 2px 10px rgba(44,62,107,0.07);
  margin-bottom: 0;
}

.attr-panel--pred {
  background: #fafffe;
  border: 1.5px solid #b8ddc6;
}

.attr-panel--gt {
  background: #f7f8ff;
  border: 1.5px solid #b8c6e8;
}

.attr-panel-title {
  font-family: 'Noto Serif', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: #2c3e6b;
  margin-bottom: 0.65rem;
  text-align: center;
  line-height: 1.4;
}

/* ── Attribute chips ─────────────────────────────────────── */
.attr-row {
  display: flex;
  gap: 6px;
  width: 100%;
}

.attr-chip {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f2fbf5;
  border: 1.5px solid #c0dfc9;
  border-radius: 8px;
  padding: 0.38rem 0.3rem;
  transition: background 0.4s ease, border-color 0.4s ease;
}

.attr-chip--gt {
  background: #f0f3fa;
  border-color: #c4cde8;
}

.attr-chip-label {
  font-size: 0.63rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #999;
  line-height: 1.3;
  white-space: nowrap;
}

.attr-chip-value {
  font-size: 0.95rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #27ae60;
  line-height: 1.3;
  white-space: nowrap;
  transition: color 0.4s ease;
}

.attr-chip--gt .attr-chip-value { color: #2c3e6b; }

/* ══════════════════════════════════════════════════════════
   ATTRIBUTE COMPARISON — pred ⌒Δ⌒ gt
   Each attribute row shows pred (green pill) → arched connector
   with a Δ badge in the middle → gt (blue pill). Match (pred=gt)
   switches the row to a green theme with a ✓ badge.
══════════════════════════════════════════════════════════ */
.attr-comparison {
  display: grid;
  grid-template-rows: auto repeat(4, auto);
  row-gap: 0.18rem;
  padding: 0.3rem 0.4rem 0.35rem;
  background: rgba(255,255,255,0.4);
  border-radius: 14px;
  border: 1px solid #e5e9f2;
}

/* Column headers above the predicted/ground-truth pills */
.comparison-headers {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) minmax(90px, 1.2fr) minmax(0, 1fr);
  column-gap: 0.3rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid #edf0f7;
  margin-bottom: 0.05rem;
}

.comparison-header {
  font-family: 'Noto Serif', serif;
  font-size: 0.92rem;
  font-weight: 600;
  text-align: center;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.comparison-header-pred { color: #1f8a4d; }
.comparison-header-gt   { color: #2c3e6b; }

.comparison-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) minmax(90px, 1.2fr) minmax(0, 1fr);
  align-items: center;
  column-gap: 0.3rem;
}

/* Display order: age, gender, height, weight (headers stay first at order: 0) */
.comparison-row[data-attr="age"]    { order: 1; }
.comparison-row[data-attr="gender"] { order: 2; }
.comparison-row[data-attr="height"] { order: 3; }
.comparison-row[data-attr="weight"] { order: 4; }

.comparison-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8a8f9c;
  white-space: nowrap;
}

.comparison-pred,
.comparison-gt {
  text-align: center;
  padding: 0.3rem 0.45rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  line-height: 1.2;
  transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease;
}

.comparison-pred {
  background: #f2fbf5;
  border: 1.5px solid #c0dfc9;
  color: #1f8a4d;
}

.comparison-gt {
  background: #f0f3fa;
  border: 1.5px solid #c4cde8;
  color: #2c3e6b;
}

/* ── Connector cell: straight SVG line + floating Δ badge ──── */
.comparison-connector {
  position: relative;
  height: 28px;
  min-width: 90px;
}

.comparison-connector svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}

.connector-path {
  fill: none;
  stroke: #cbd2e0;
  stroke-width: 1.75;
  stroke-linecap: round;
  transition: stroke 0.35s ease;
}

.comparison-row.match .connector-path {
  stroke: #b8ddc6;
}

.comparison-delta {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: #ffffff;
  border: 1.5px solid #cbd2e0;
  border-radius: 16px;
  padding: 0.16rem 0.65rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: #555;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  letter-spacing: 0.01em;
  box-shadow: 0 1px 3px rgba(20,30,60,0.07);
  transition: background 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

.comparison-delta .delta-icon {
  font-weight: 800;
  opacity: 0.75;
  font-size: 0.85em;
}

.comparison-row.match .comparison-delta {
  background: #fafffe;
  border-color: #b8ddc6;
  color: #1f8a4d;
}

/* Hide the Δ symbol on a match — the ✓ stands alone */
.comparison-row.match .delta-icon { display: none; }

/* On phones the connector squeezes; keep it readable */
@media (max-width: 900px) {
  .comparison-row {
    grid-template-columns: 56px minmax(0, 1fr) minmax(80px, 1fr) minmax(0, 1fr);
  }
  .comparison-pred,
  .comparison-gt {
    font-size: 0.85rem;
    padding: 0.35rem 0.4rem;
  }
  .comparison-connector {
    height: 26px;
    min-width: 70px;
  }
  .comparison-delta {
    font-size: 0.74rem;
    padding: 0.12rem 0.5rem;
  }
}

/* ── Render arrow (dots + chevron SVG) ───────────────────── */
.render-arrow {
  display: flex;
  justify-content: center;
  margin-top: 8px;
}

.render-arrow-svg {
  width: 36px;
  height: 46px;
}

.render-arrow-svg--pred { color: #27ae60; }
.render-arrow-svg--gt  { color: #2c3e6b; }

/* ── Video panel cards (row 2, equal height) ─────────────── */
.demo-panel {
  border-radius: 12px;
  overflow: hidden;
  background: #1a1a1a;
  border: 1px solid #2e2e2e;
  box-shadow: 0 4px 20px rgba(0,0,0,0.18);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.demo-panel:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(0,0,0,0.28);
}

/* ── Video wrapper ───────────────────────────────────────── */
.panel-video-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #1a1a1a;
  line-height: 0;
}

.panel-video-wrap video {
  width: 100%;
  height: 520px;
  object-fit: contain;
  display: block;
  background: #1a1a1a;
}

.panel-iframe-wrap { background: #1a1a1a; }

.g1-viewer-iframe {
  display: block;
  width: 100%;
  height: 520px;
  border: none;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .demo-panels {
    grid-template-columns: 1fr;
    grid-template-rows: unset;
    max-width: 520px;
    margin: 0 auto;
    row-gap: 12px;
  }
  .panel-video-wrap video,
  .g1-viewer-iframe { height: 380px; }
  .demo-col-header { padding-bottom: 4px; }
  .demo-selector {
    grid-column: 1;
    grid-row: auto;
    align-self: stretch;
    flex-direction: row;
    align-items: center;
    gap: 0.6rem;
  }
  .demo-selector-label { text-align: left; }
  .attr-comparison-wrap { grid-column: 1 / -1 !important; }
  .sync-bar {
    grid-column: 1;
    grid-row: auto;
    margin-top: 6px;
  }
}

/* ── Activity selector dropdown (sidebar in 4-col grid) ─── */
.demo-selector {
  grid-column: 1;
  grid-row: 1 / 3;
  align-self: center;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.4rem;
  margin-bottom: 0;
}

.demo-selector-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
  text-align: center;
}

.demo-selector-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.demo-select {
  appearance: none;
  -webkit-appearance: none;
  background: #fff;
  border: 1.5px solid #d0d8f0;
  border-radius: 8px;
  padding: 0.45rem 2rem 0.45rem 0.7rem;
  font-family: 'Noto Serif', serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: #2c3e6b;
  cursor: pointer;
  outline: none;
  width: 100%;
  min-width: 0;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.demo-select:hover  { border-color: #7a9adc; }
.demo-select:focus  { border-color: #2c3e6b; box-shadow: 0 0 0 3px rgba(44,62,107,0.12); }

.demo-select-arrow {
  position: absolute;
  right: 0.7rem;
  font-size: 1rem;
  color: #2c3e6b;
  pointer-events: none;
  line-height: 1;
}

.demo-selector-count {
  font-size: 0.75rem;
  color: #aaa;
  white-space: nowrap;
}

/* Loading state while switching demo */
.demo-panel.loading { opacity: 0.4; transition: opacity 0.2s; }

/* ── Master sync bar ────────────────────────────────────── */
.sync-bar {
  grid-column: 2 / 5;
  grid-row: 3;
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid #e0e4ed;
  border-radius: 10px;
  padding: 0.65rem 1.1rem;
  box-shadow: 0 1px 6px rgba(44,62,107,0.06);
}

.sync-btn {
  flex-shrink: 0;
  width: 30px; height: 30px;
  border: none;
  background: #2c3e6b;
  color: #fff;
  border-radius: 50%;
  font-size: 12px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.sync-btn:hover { background: #e74c3c; }

.sync-progress {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  background: #e0e4ed;
  border-radius: 99px;
  outline: none;
  cursor: pointer;
}
.sync-progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: #2c3e6b;
  cursor: pointer;
}

.sync-time {
  flex-shrink: 0;
  font-size: 11px;
  color: #888;
  min-width: 70px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.sync-speed {
  flex-shrink: 0;
  font-size: 11px;
  padding: 3px 6px;
  border: 1px solid #dde;
  border-radius: 4px;
  background: #fff;
  color: #444;
  cursor: pointer;
}

.sync-hint {
  flex-shrink: 0;
  font-size: 10px;
  color: #aaa;
  letter-spacing: 0.03em;
  white-space: nowrap;
}


/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .demo-panels {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }

  .panel-video-wrap video { height: 420px; }

  .demo-panel--with-card {
    flex-direction: column;
  }

  .bio-card--side {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #edf0f7;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: space-around;
  }

  .bio-card--side .bio-row { margin-bottom: 0; }
}

/* ── Navbar ───────────────────────────────────────────────── */
#main-nav {
  transition: background 0.3s, box-shadow 0.3s;
  background: transparent;
}

#main-nav.scrolled {
  background: #ffffff !important;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

#main-nav .navbar-brand {
  font-family: 'Noto Serif', serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: #2c3e6b;
  letter-spacing: 0.04em;
}

#main-nav .nav-link {
  font-weight: 600;
  color: #2c3e6b;
  padding-left: 1rem;
  padding-right: 1rem;
}

#main-nav .nav-link:hover {
  color: #e74c3c;
}

/* ── Hero ─────────────────────────────────────────────────── */
#hero {
  padding: 30px 0 25px;
  text-align: center;
  background: #ffffff;
}

#hero .container { max-width: 1280px; }

#hero h1.paper-title {
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.55rem;
  color: #2c3e6b;
  white-space: nowrap;
}

#hero h1.paper-title .unveil-keyword {
  color: #e74c3c;
}

#hero .authors-line {
  font-size: 0.95rem;
  color: #666;
  margin-top: 0.4rem !important;
  margin-bottom: 0.15rem;
}

#hero .venue-line {
  font-size: 0.9rem;
  font-weight: 600;
  color: #2c3e6b;
  margin-bottom: 0.85rem;
}

#hero .d-flex { margin-top: 0.5rem !important; }

.btn-pill {
  border-radius: 50px;
  padding: 0.2rem 1.05rem;
  font-size: 0.82rem;
  font-weight: 600;
  margin: 0.2rem;
  border-width: 1.5px;
  cursor: default;
  opacity: 0.55;
  pointer-events: none;
  line-height: 1.4;
}

.btn-pill-enabled {
  opacity: 1;
  pointer-events: auto;
  cursor: pointer;
  background: #111 !important;
  color: #fff !important;
  border-color: #111 !important;
}

.btn-pill-enabled:hover,
.btn-pill-enabled:focus {
  background: #2c3e6b !important;
  color: #fff !important;
  border-color: #2c3e6b !important;
}

.btn-pill-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.pill-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  vertical-align: middle;
}

/* ── Teaser Pipeline ──────────────────────────────────────── */
#teaser {
  background: #f8f9fa;
  padding: 70px 0 60px;
}

.teaser-pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: nowrap;
  padding: 2rem 0;
}

.pipeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  flex: 0 0 auto;
}

.pipeline-node.visible {
  opacity: 1;
  transform: translateY(0);
}

.node-icon {
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-bottom: 0.75rem;
  font-size: 2.8rem;
}

.node-icon.human {
  background: #eaf0ff;
  border: 2px solid #2c3e6b;
}

.node-icon.robot {
  background: #fff3f3;
  border: 2px solid #e74c3c;
}

.node-icon.result {
  background: #fff8e1;
  border: 2px solid #f39c12;
  width: auto;
  height: auto;
  border-radius: 12px;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  text-align: left;
  min-width: 200px;
}

.node-label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #2c3e6b;
  margin-top: 0.25rem;
}

.node-sublabel {
  font-size: 0.78rem;
  color: #888;
  max-width: 120px;
}

/* Pipeline arrows */
.pipeline-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 1rem;
  opacity: 0;
  transition: opacity 0.6s ease 0.3s;
  flex: 0 0 auto;
}

.pipeline-arrow.visible {
  opacity: 1;
}

.arrow-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: #888;
  margin-bottom: 0.25rem;
  white-space: nowrap;
}

.arrow-line {
  display: flex;
  align-items: center;
  gap: 0;
}

.arrow-dash {
  width: 60px;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    #aaa 0,
    #aaa 6px,
    transparent 6px,
    transparent 12px
  );
  animation: dash-flow 1.2s linear infinite;
}

@keyframes dash-flow {
  from { background-position: 0 0; }
  to   { background-position: 24px 0; }
}

.arrow-head {
  width: 0;
  height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 10px solid #aaa;
}

/* Inferred attributes card */
.attr-card {
  background: #fff;
  border: 2px solid #e74c3c;
  border-radius: 12px;
  padding: 1.1rem 1.4rem;
  min-width: 200px;
  box-shadow: 0 4px 18px rgba(231,76,60,0.12);
}

.attr-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #e74c3c;
  margin-bottom: 0.7rem;
  border-bottom: 1px solid #fde;
  padding-bottom: 0.3rem;
}

.attr-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: #333;
}

.attr-row .emoji {
  font-size: 1rem;
  width: 1.4rem;
  text-align: center;
}

.attr-value {
  font-weight: 700;
  color: #2c3e6b;
}

.teaser-caption {
  text-align: center;
  font-style: italic;
  color: #555;
  font-size: 0.95rem;
  max-width: 720px;
  margin: 1.5rem auto 0;
  line-height: 1.6;
}

/* Teaser video placeholder */
.video-placeholder {
  border: 2px dashed #ccc;
  border-radius: 8px;
  padding: 2.5rem;
  text-align: center;
  color: #999;
  font-size: 0.9rem;
  margin-top: 2rem;
}

/* ── PDF figures rendered via PDF.js ──────────────────────── */
.pdf-figure-wrap {
  width: 100%;
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.pdf-canvas {
  display: block;
  width: 100%;
  height: auto;
  min-height: 200px;   /* visible while rendering */
  background: #f8f9fa;
}

/* PDF fallback link — hidden once canvas renders */
.pdf-fallback {
  text-align: center;
  padding: 0.5rem;
  font-size: 0.85rem;
  color: #888;
  margin: 0;
}
.pdf-canvas.rendered + .pdf-fallback { display: none; }

/* ── Interactive framework visualization (iframe embed) ───── */
/* The wrapper fills the (now wide) .container. The iframe matches the
   standalone panel's aspect ratio (1640 × 630 ≈ 2.60) so at the container's
   1240 px the panel reads at ~477 px tall. We let the height grow up to
   ~600 px on tall windows so the visualization gets the same generous canvas
   it has on the dedicated page. */
.viz-embed-wrap {
  width: 100%;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  border: 1px solid #e6ebf2;
  box-shadow: 0 2px 8px rgba(20, 30, 50, 0.06);
}
.viz-embed-frame {
  display: block;
  width: 100%;
  height: min(72vh, 600px);
  min-height: 460px;
  border: 0;
  background: #ffffff;
}
@media (max-width: 720px) {
  /* On narrow viewports favor a taller panel so labels stay readable. */
  .viz-embed-frame { height: 60vw; min-height: 340px; }
}

/* ── Visualization method note (top of demo container) ────── */
.viz-method-row {
  display: grid;
  grid-template-columns: minmax(130px, 0.45fr) 1fr 1fr 1fr;
  column-gap: 18px;
  margin-top: 0.9rem;
}

.viz-method-card {
  grid-column: 2 / 5;
  padding: 0.7rem 1.1rem;
  background: #f6f7fb;
  border-left: 3px solid #b8c8f0;
  border-radius: 6px;
  font-size: 0.9rem;
  line-height: 1.55;
  color: #555;
}

@media (max-width: 900px) {
  .viz-method-row { grid-template-columns: 1fr; max-width: 520px; margin: 0.9rem auto 0; }
  .viz-method-card { grid-column: 1; }
}
.viz-method-label {
  display: inline-block;
  font-family: 'Noto Serif', serif;
  font-weight: 700;
  color: #2c3e6b;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 0.55rem;
}

/* ══════════════════════════════════════════════════════════
   INTERPRETABLE FEATURES — one panel per attribute, mirrors
   the per-cell size used in feature-analysis-animation/final-matrix.html
   (110px label column + 1fr panel, 470px row height).
══════════════════════════════════════════════════════════ */
.interpretable-intro {
  font-size: 1.02rem;
  line-height: 1.7;
  color: #444;
  margin-bottom: 1.5rem;
}

.interpretable-grid {
  display: grid;
  grid-template-columns: 110px minmax(0, 700px);
  grid-auto-rows: 470px;
  column-gap: 16px;
  row-gap: 16px;
  justify-content: center;
  margin: 0 auto;
}

.interpretable-attr-cell {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 12px;
  font-family: 'Noto Serif', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #2c3e6b;
  letter-spacing: 0.02em;
}

.interpretable-panel-cell {
  position: relative;
  background: #ffffff;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #d6dde6;
  box-shadow: 0 2px 8px rgba(20, 30, 50, 0.08),
              0 1px 3px rgba(20, 30, 50, 0.05);
}

.interpretable-iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.interpretable-more {
  margin-top: 1.25rem;
  text-align: center;
  font-size: 0.95rem;
  color: #555;
}
.interpretable-more a { font-weight: 600; }

@media (max-width: 720px) {
  .interpretable-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }
  .interpretable-attr-cell {
    justify-content: flex-start;
    padding-right: 0;
    padding-top: 6px;
  }
  .interpretable-panel-cell { height: 440px; }
}

/* ── Abstract ─────────────────────────────────────────────── */
#abstract .abstract-text {
  font-size: 1.02rem;
  line-height: 1.85;
  color: #444;
  border-left: 4px solid #2c3e6b;
  padding-left: 1.5rem;
}

/* ── Method ───────────────────────────────────────────────── */
#method .method-placeholder {
  border: 2px dashed #ccc;
  border-radius: 8px;
  background: #f8f9fa;
  height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

/* ── Results Table ────────────────────────────────────────── */
.results-caption {
  font-size: 0.92rem;
  color: #555;
  margin-bottom: 0.75rem;
}

.results-table {
  font-size: 0.88rem;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid #dde3f0;
  border-radius: 10px;
  overflow: hidden;
}

.results-table thead th {
  background: #2c3e6b;
  color: #fff;
  font-weight: 600;
  font-size: 1.0rem;
  text-align: center;
  vertical-align: middle;
  padding: 0.7rem 0.8rem;
  border: none;
  line-height: 1.35;
  white-space: nowrap;
}

.results-table thead th small {
  display: block;
  font-weight: 400;
  font-size: 0.85rem;
  opacity: 0.85;
  margin-top: 3px;
}

/* Corner cell with diagonal label split */
.results-corner {
  background: #1e2d52 !important;
  padding: 0.55rem 0.8rem !important;
  min-width: 200px;
  line-height: 1.3;
}

.corner-task {
  display: block;
  text-align: right;
  font-size: 0.95rem;
  color: #a8c0ff;
  font-weight: 600;
}

.corner-setting {
  display: block;
  text-align: left;
  font-size: 0.95rem;
  color: #7dcfa8;
  font-weight: 600;
  margin-top: 4px;
}

.results-table tbody td {
  vertical-align: middle;
  text-align: center;
  padding: 0.55rem 0.75rem;
  border-top: 1px solid #edf0f7;
}

.results-setting {
  text-align: left !important;
  font-weight: 500;
  color: #1b5c3a;
  white-space: nowrap;
}

.results-section-header td {
  background: #f4f7f4;
  text-align: center !important;
  color: #555;
  font-size: 0.82rem;
  padding: 0.45rem 0.75rem;
  border-top: 2px solid #d0e0d0 !important;
  border-bottom: 1px solid #d0e0d0;
}

#results .highlight-cell {
  font-weight: 600;
}

.results-note {
  font-size: 0.88rem;
  color: #666;
  font-style: italic;
  margin-top: 0.75rem;
}

/* ── Dataset Stat Cards ───────────────────────────────────── */
#dataset .stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(44,62,107,0.09);
  border-top: 4px solid #2c3e6b;
}

#dataset .stat-number {
  font-family: 'Noto Serif', serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: #2c3e6b;
  line-height: 1.1;
}

#dataset .stat-label {
  font-size: 0.88rem;
  color: #666;
  margin-top: 0.3rem;
}

#dataset .dataset-placeholder {
  border: 2px dashed #ccc;
  border-radius: 8px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #bbb;
  font-size: 0.95rem;
  margin-top: 2rem;
}

/* ── BibTeX ───────────────────────────────────────────────── */
#bibtex pre {
  background: #1e2433;
  color: #cdd3e0;
  border-radius: 8px;
  padding: 1.5rem 1.75rem;
  font-size: 0.88rem;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
}

/* ── Footer ───────────────────────────────────────────────── */
footer {
  background: #f0f2f7;
  border-top: 1px solid #dde;
  padding: 2.5rem 0;
  text-align: center;
  font-size: 0.88rem;
  color: #888;
}

/* ── Fade-in animations (IntersectionObserver driven) ──────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1100px) {
  #hero h1.paper-title {
    white-space: normal;
  }
}

@media (max-width: 768px) {
  #hero h1.paper-title {
    font-size: 1.5rem;
  }

  .teaser-pipeline {
    flex-direction: column;
    gap: 1rem;
  }

  .pipeline-arrow {
    transform: rotate(90deg);
  }

  .arrow-dash {
    width: 40px;
  }

  section {
    padding: 55px 0;
  }

  .section-heading {
    font-size: 1.5rem;
  }
}