/* ---- Design tokens ----------------------------------------------------- */
:root {
  color-scheme: dark;
  --bg: #0e0e0f;
  --bg-soft: #161618;
  --fg: #ededed;
  --fg-muted: #a0a0a0;
  --rule: #262628;
  --border: #262628;
  --accent: #2b5d8b;
  --accent-soft: rgba(120, 170, 215, 0.22);
  --accent-bright: #78aad7;
  --radius: 7px;
  --shadow-media: 0 4px 16px rgba(0, 0, 0, 0.45);
  --serif: "Source Serif 4", Charter, "Iowan Old Style", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --container: 1430px;
  --pad-y: clamp(44px, 5vw, 72px);
  --t-fast: 150ms ease;
  --t-fade: 200ms ease;
}

/* ---- Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; cursor: pointer; }
ol, ul { padding: 0; margin: 0; list-style: none; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---- Layout primitives ------------------------------------------------- */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}
.container.narrow {
  max-width: 900px;
}
.section {
  padding-block: var(--pad-y);
  border-top: 1px solid var(--rule);
  scroll-margin-top: 64px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--fg-muted);
  margin: 0 0 14px;
}
.serif-h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.6rem, 2.4vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0 0 12px;
}
.section-subtitle {
  color: var(--fg-muted);
  max-width: 62ch;
  margin: 0 0 36px;
}
.section-header { margin-bottom: 32px; }
.section-header-flex {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.section-header-flex .section-subtitle { margin-bottom: 0; }

.muted { color: var(--fg-muted); }

/* ---- Hero -------------------------------------------------------------- */
.hero {
  padding-block: clamp(36px, 4vw, 64px) clamp(40px, 5vw, 72px);
  border-top: 0;
}
.pill {
  display: inline-block;
  border: 1px solid var(--rule);
  color: var(--fg-muted);
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 24px;
  max-width: 22ch;
}
.title-sub {
  display: block;
  color: var(--fg-muted);
  font-weight: 500;
}
.authors {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
  margin-bottom: 14px;
  font-size: 1.05rem;
}
.authors li { display: inline; }
.authors sup { font-size: 0.68em; color: var(--fg-muted); margin-left: 2px; letter-spacing: 0.02em; }
.author-name { font-weight: 500; }
.affil {
  color: var(--fg-muted);
  font-size: 0.92rem;
  margin: 0 0 28px;
}
.affil sup { font-size: 0.85em; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 22px;
  align-items: center;
  margin-bottom: 60px;
}
.action {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-size: 1rem;
  font-weight: 500;
  padding: 4px 0;
  transition: color var(--t-fast);
}
.action:hover { color: var(--accent); text-decoration: none; }
.action:hover svg { color: var(--accent); }
.action svg {
  color: var(--fg-muted);
  width: 24px;
  height: 24px;
  transition: color var(--t-fast);
}

.teaser {
  margin: 0;
  padding: 0;
}
.teaser picture, .teaser img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-media);
  width: 100%;
}
.teaser figcaption {
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--fg-muted);
}
.teaser code {
  font-size: 0.85em;
  background: var(--bg-soft);
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

/* ---- Abstract ---------------------------------------------------------- */
.abstract-video-section {
  position: relative;
  overflow: hidden;
}
.abstract-bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.abstract-overlay {
  position: absolute;
  inset: 0;
  background: rgba(14, 14, 15, 0.75);
  z-index: 1;
}
.abstract-video-section .container {
  position: relative;
  z-index: 2;
}
#abstract .prose {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--fg);
  margin: 0 0 18px;
  max-width: 70ch;
}

/* ---- Comparison rows (shared) ----------------------------------------- */
.col-headers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-bottom: 12px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--rule);
}
.col-header {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.005em;
  color: var(--fg);
  text-align: center;
}
.section-a-col-headers {
  grid-template-columns: repeat(4, 1fr);
}
.section-c-col-headers {
  grid-template-columns: repeat(2, 1fr);
}
.rows {
  display: flex;
  flex-direction: column;
  gap: 56px;
}
.row {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.row-caption {
  font-size: 0.86rem;
  color: var(--fg-muted);
  letter-spacing: 0.005em;
  font-variant-numeric: tabular-nums;
}
.carousel-viewport .row-caption {
  display: none;
}
.row-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}
.row-grid-4col {
  grid-template-columns: repeat(4, 1fr);
}
.section-c-grid {
  grid-template-columns: repeat(2, 1fr);
}
.section-c-grid .video-controls {
  grid-column: 1 / -1;
}
.cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}
.cell-label {
  display: none; /* desktop: header strip suffices */
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
#section-a .cell-label {
  display: block;
  text-align: center;
}
.media {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  aspect-ratio: 16 / 9;
  transition: border-color var(--t-fast);
}
.media:hover {
  border-color: rgba(120, 170, 215, 0.35);
}
.media > img,
.media > video,
.media > picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---- Carousel --------------------------------------------------------- */
.carousel-group {
  margin-bottom: 48px;
}
.carousel-group:last-child {
  margin-bottom: 0;
}
.carousel-group-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  margin: 0 0 24px;
  padding: 10px 18px;
  background: var(--fg);
  color: var(--bg);
  border-radius: var(--radius);
  display: inline-block;
}
.carousel-viewport {
  position: relative;
  overflow: hidden;
}
.carousel-viewport .rows {
  gap: 0;
}
.carousel-viewport .row {
  display: none;
}
.carousel-viewport .row.active {
  display: flex;
}
.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 20px;
}
.carousel-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.carousel-arrow:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: scale(1.08);
}
.carousel-arrow:active {
  transform: scale(0.95);
}
.carousel-arrow:disabled {
  opacity: 0.3;
  pointer-events: none;
}
.carousel-indicator {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  min-width: 4ch;
  text-align: center;
}

/* ---- Section A: sample stack & slider --------------------------------- */
.sample-counter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}
.sample-stack {
  position: relative;
}
.sample-stack > picture,
.sample-stack > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--t-fade);
}
.sample-stack > picture { display: block; }
.sample-stack > picture img,
.sample-stack > picture source { width: 100%; height: 100%; object-fit: cover; }
.sample-stack > picture.active,
.sample-stack > img.active { opacity: 1; }
/* Parent height is established by aspect-ratio on .media. */

.sample-controls {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
  width: 50%;
  margin-inline: auto;
}

.dots {
  display: flex;
  gap: 6px;
  align-items: center;
}
.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--rule);
  transition: background var(--t-fast), transform var(--t-fast);
}
.dot.active {
  background: var(--accent);
  transform: scale(1.25);
}

/* Custom range input (slider) */
.range {
  --fill: 0%;
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
  margin: 0;
  padding: 0;
}
.range:focus { outline: none; }
.range::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(
    to right,
    var(--accent) 0%,
    var(--accent) var(--fill),
    var(--rule) var(--fill),
    var(--rule) 100%
  );
}
.range::-moz-range-track {
  height: 3px;
  border-radius: 3px;
  background: var(--rule);
}
.range::-moz-range-progress {
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  margin-top: -6.5px;
  box-shadow: 0 0 0 0 transparent;
  transition: box-shadow var(--t-fast), transform var(--t-fast);
}
.range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 0 transparent;
  transition: box-shadow var(--t-fast), transform var(--t-fast);
}
.range:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.range:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.range:active::-webkit-slider-thumb { transform: scale(1.05); }
.range:active::-moz-range-thumb { transform: scale(1.05); }

/* ---- Section D: Ablation (zoom comparison) ----------------------------- */
.ablation-col-headers {
  grid-template-columns: 1.75fr 1.75fr 1fr;
}
.ablation-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.ablation-row-grid-3 {
  grid-template-columns: 1.75fr 1.75fr 1fr;
  align-items: start;
}
.ablation-zoom-full {
  aspect-ratio: 616 / 352;
}
.ablation-zoom-crop {
  aspect-ratio: 1 / 1;
}
.ablation-source {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.ablation-source img {
  display: block;
  width: 100%;
  height: auto;
}
.ablation-zoom {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: ew-resize;
  user-select: none;
  -webkit-user-select: none;
}
.ablation-zoom img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.ablation-zoom .ablation-img-top {
  z-index: 1;
  clip-path: inset(0 50% 0 0);
}
.ablation-slider-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: #f5f5f5;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.25);
  z-index: 2;
  pointer-events: none;
  left: 50%;
  transform: translateX(-50%);
}
.ablation-slider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid #d8d8d8;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: ew-resize;
}
.ablation-slider-handle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.ablation-slider-handle svg {
  color: #999;
  width: 10px;
  height: 10px;
}
.ablation-label {
  position: absolute;
  top: 8px;
  z-index: 4;
  font-size: 11px;
  font-variant: small-caps;
  letter-spacing: 0.03em;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  padding: 4px 8px;
  border-radius: 4px;
  pointer-events: none;
  line-height: 1;
}
.ablation-label-left { left: 8px; }
.ablation-label-right { right: 8px; }
.ablation-caption {
  margin-top: 14px;
  font-size: 0.88rem;
  font-style: italic;
  color: var(--fg-muted);
  max-width: 100%;
}
@media (max-width: 900px) {
  .ablation-col-headers { display: none; }
  .ablation-row-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ---- Section B: video controls ---------------------------------------- */
.input-grid-1 .media { aspect-ratio: 16 / 9; }
.input-grid-2 {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}
.input-grid-2 .media { aspect-ratio: 16 / 9; }
.input-grid-quad {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.input-grid-quad .media { aspect-ratio: 4 / 3; }

.video-controls {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 6px;
  width: 50%;
  margin-inline: auto;
}
.video-controls .ghost-btn { padding: 4px 10px; font-size: 0.82rem; }
.video-controls .range { flex: 1; }

.ghost-btn {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--fg);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 0.01em;
  font-weight: 500;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.ghost-btn:hover {
  border-color: var(--fg-muted);
}
.ghost-btn[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---- Sticky site nav --------------------------------------------------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(14, 14, 15, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
  transform: translateY(-100%);
  transition: transform 240ms ease;
}
.site-nav.visible {
  transform: translateY(0);
}
.site-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 52px;
}
.site-nav-brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--fg);
  white-space: nowrap;
}
.site-nav-brand:hover {
  color: var(--accent-bright);
  text-decoration: none;
}
.site-nav-links {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav-links::-webkit-scrollbar { display: none; }
.site-nav-links a {
  color: var(--fg-muted);
  font-size: 0.86rem;
  font-weight: 500;
  padding: 6px 11px;
  border-radius: 999px;
  white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast);
}
.site-nav-links a:hover {
  color: var(--fg);
  text-decoration: none;
}
.site-nav-links a.active {
  color: var(--fg);
  background: var(--accent-soft);
}

/* ---- Paper figure plates (Method section) ------------------------------- */
.figure-plate {
  margin: 0;
  padding: clamp(14px, 2vw, 26px);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-media);
  display: flex;
  flex-direction: column;
}
.figure-plate img {
  width: 100%;
  height: auto;
  display: block;
  margin-block: auto;
}
.figure-tag {
  display: block;
  margin-bottom: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: #6b6b68;
}
.figure-tag-accent {
  color: var(--accent-bright);
}
.figure-plate-dark {
  background: var(--bg);
  box-shadow: none;
}
.figure-plate-dark .figure-tag {
  color: var(--fg-muted);
}
.figure-plate-dark.figure-tag-accent,
.figure-plate-dark .figure-tag-accent {
  color: var(--accent-bright);
}
.framework-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.framework-card {
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.framework-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 28px rgba(43, 93, 139, 0.3);
}
.pipeline-plate {
  margin-top: 56px;
}
.figure-caption {
  margin: 16px 2px 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--fg-muted);
  max-width: 100ch;
}
.legend-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--fg-muted);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 5px 13px;
}
.legend-chip b {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--accent-bright);
}

/* ---- Results: tabs + tables --------------------------------------------- */
.results-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}
.results-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--fg-muted);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.results-tab:hover {
  border-color: var(--fg-muted);
  color: var(--fg);
}
.results-tab[aria-selected="true"] {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.results-tab-badge {
  font-size: 0.64rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 2px 7px;
  opacity: 0.75;
}
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg-soft);
}
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 760px;
  font-variant-numeric: tabular-nums;
}
.results-table th,
.results-table td {
  padding: 10px 14px;
  text-align: right;
  white-space: nowrap;
}
.results-table .col-method {
  text-align: left;
}
.results-table thead th {
  border-bottom: 1px solid var(--rule);
}
.results-table thead .col-group {
  text-align: center;
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-muted);
  padding-bottom: 6px;
}
.results-table thead .col-metric {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--fg);
}
.results-table thead .col-method {
  font-size: 0.82rem;
  font-weight: 600;
  vertical-align: bottom;
}
.metric-dir {
  color: var(--fg-muted);
  font-weight: 400;
}
.results-table tbody tr {
  transition: background var(--t-fast);
}
.results-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}
.results-table tbody th {
  font-weight: 450;
  color: var(--fg);
  border-top: 1px solid var(--rule);
}
.results-table tbody td {
  color: var(--fg-muted);
  border-top: 1px solid var(--rule);
}
.results-table td.best {
  color: var(--accent-bright);
  font-weight: 600;
}
.results-table tr.row-ours {
  background: rgba(43, 93, 139, 0.16);
}
.results-table tr.row-ours:hover {
  background: rgba(43, 93, 139, 0.24);
}
.results-table tr.row-ours .col-method {
  box-shadow: inset 3px 0 0 var(--accent);
  font-weight: 600;
}
.results-table tr.row-ours td {
  color: var(--fg);
}
.ours-chip {
  margin-left: 8px;
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-bright);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 2px 7px;
  vertical-align: 1px;
}
.results-note {
  margin: 14px 2px 0;
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--fg-muted);
  max-width: 95ch;
}
/* ---- Component ablation tables ------------------------------------------ */
.component-ablation {
  margin-top: 72px;
}
.ablation-tables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
.ablation-table-card .carousel-group-title {
  font-size: 0.85rem;
  padding: 8px 14px;
  margin-bottom: 16px;
}
.ablation-tables .results-table {
  min-width: 560px;
}

/* ---- Scroll reveal ------------------------------------------------------ */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition:
      opacity 600ms cubic-bezier(0.22, 1, 0.36, 1),
      transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--reveal-delay, 0ms);
  }
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
  .framework-card-ours { --reveal-delay: 90ms; }
}

/* ---- Footer ----------------------------------------------------------- */
footer {
  border-top: 1px solid var(--rule);
  padding-block: 36px 56px;
  margin-top: 0;
}
.footer-line {
  margin: 0 0 6px;
  font-size: 0.86rem;
  color: var(--fg-muted);
}

/* ---- Responsive ------------------------------------------------------- */
@media (max-width: 900px) {
  .col-headers { display: none; }
  .framework-pair,
  .ablation-tables {
    grid-template-columns: 1fr;
  }
  .ablation-row-grid-3 {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .row-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .cell-label { display: block; }
  .row-grid-4col { grid-template-columns: 1fr; }
  .section-c-grid { grid-template-columns: 1fr; }
  .section-c-grid .video-controls { grid-column: 1; }
  .video-controls {
    grid-column: 1;
    width: 100%;
  }
  .sample-controls {
    grid-column: 1;
    width: 100%;
  }
  .rows { gap: 44px; }
  .actions { gap: 14px 18px; }
}

@media (max-width: 520px) {
  body { font-size: 15.5px; }
  .title { font-size: clamp(1.7rem, 8vw, 2.4rem); }
  .pill { margin-bottom: 18px; }
  .site-nav-brand { display: none; }
}

/* ---- Authors / affiliations polish ------------------------------------ */
.authors .author-name {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.authors .author-name:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}
.affil {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
}
.affil-sep { color: var(--rule); }

/* ---- BibTeX ----------------------------------------------------------- */
.bibtex-block { position: relative; }
.bibtex-block pre {
  margin: 0;
  padding: 22px 24px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--fg);
  white-space: pre;
}
.bibtex-block pre code {
  font-family: inherit;
  color: inherit;
  background: transparent;
  padding: 0;
  border: 0;
}
.bibtex-copy {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg);
}
.bibtex-copy.copied {
  color: var(--accent);
  border-color: var(--accent);
}
@media (max-width: 520px) {
  .bibtex-copy {
    position: static;
    margin-bottom: 12px;
  }
}

/* ---- Reduced motion --------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  .sample-stack > picture,
  .sample-stack > img {
    transition: none !important;
  }
  .abstract-bg-video {
    display: none;
  }
}