/* ============================================================
   DreamHand project page
   Blue-pink, light, minimal. Token-driven, no external assets.

   Palette is a pastel pink -> lavender -> blue sky. Surfaces carry the
   pastels; anything that carries text is deepened until it clears WCAG AA.

   Colour roles
     blue  -> interface: nav, links, focus rings, and every selected state
              (scene pills, dataset tabs, retarget thumbs)
     pink  -> "ours": the headline result numbers, the DreamHand tile,
              the DreamHand results row, the human-hand art
     rose->violet->periwinkle gradient carries the wordmark; pink->blue
     carries the section rules and the compare divider
   ============================================================ */

:root {
  /* surfaces */
  --bg: #fdfaff;
  --bg-pink: #fdf2f7;
  --bg-blue: #f1f5fd;
  --panel: #ffffff;
  --panel-2: #f8f5fd;
  --line: #ece6f3;
  --line-strong: #d8cfe6;

  /* ink: text 16.1:1 on --bg; muted 5.5:1 on --bg, 5.2:1 on both bands */
  --text: #221a33;
  --muted: #6b6280;

  /* accents: blue 5.1:1 on --bg and 5.2:1 under white; pink-ink 5.0:1 on
     --bg and 4.5:1 on --pink-soft. --pink and --lavender are fills only. */
  --blue: #4f63cf;
  --blue-deep: #3f4cba;
  --blue-soft: #e8ebfb;
  --lavender: #8a52c0;
  --pink: #f290b8;
  --pink-ink: #b84077;
  --pink-soft: #fdeaf3;

  /* channels, for the few places that need an alpha of a token */
  --bg-rgb: 253 250 255;
  --blue-rgb: 79 99 207;
  --pink-rgb: 242 144 184;
  --lavender-rgb: 185 165 235;
  --ink-rgb: 34 26 51;

  --header-h: 66px;
  --radius: 14px;
  --radius-sm: 10px;
  /* one measure: header, every section and the footer share these edges.
     Anything that needs a narrower line length caps itself (prose 780,
     section heads 720, the figure and demo video 1000). */
  --shell: 1280px;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

sup {
  font-size: 0.62em;
  vertical-align: super;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- layout primitives ---------- */

.container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 76px 0;
}

.section-alt {
  background: linear-gradient(115deg, var(--bg-pink) 0%, #faf5fd 48%, var(--bg-blue) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

section[id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.section-head {
  max-width: 720px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-head::before {
  content: "";
  display: block;
  width: 52px;
  height: 3px;
  margin: 0 auto 20px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--pink));
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 750;
  letter-spacing: -0.02em;
  line-height: 1.18;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 12px;
  z-index: 100;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- scroll progress ---------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  height: 3px;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--blue), var(--pink));
}

/* ---------- nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgb(var(--bg-rgb) / 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgb(var(--bg-rgb) / 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 13px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--blue));
}

.brand-copy strong {
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}

.site-nav a {
  position: relative;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 550;
  transition: color 0.18s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a.active {
  color: var(--blue);
}

.site-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: var(--blue);
}

.header-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--panel);
  color: var(--blue);
  font-size: 0.86rem;
  font-weight: 700;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.header-link:hover {
  border-color: var(--blue);
  background: var(--blue-soft);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 520px at 6% -12%, rgb(var(--pink-rgb) / 0.22), transparent 64%),
    radial-gradient(760px 460px at 84% -8%, rgb(var(--lavender-rgb) / 0.16), transparent 62%),
    radial-gradient(700px 460px at 30% 96%, rgb(var(--pink-rgb) / 0.11), transparent 64%),
    radial-gradient(880px 560px at 78% 88%, rgb(var(--blue-rgb) / 0.09), transparent 66%),
    linear-gradient(168deg, #fffbfd 0%, #fdfaff 48%, #f8faff 100%);
}

.hero-hands {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 0;
  height: 245px;
  pointer-events: none;
  opacity: 0.42;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 70%);
  mask-image: linear-gradient(to bottom, transparent, #000 70%);
}

.hero-hands img {
  position: absolute;
  bottom: -34px;
  height: 255px;
  width: auto;
  max-width: none;
}

.hero-hand-human {
  left: -58px;
  transform: rotate(-10deg);
}

.hero-hand-robot {
  right: -66px;
  transform: rotate(10deg) scaleX(-1);
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2.9rem, 7vw, 4.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
}

/* Gradient text needs a real colour first: background-clip:text is dropped by
   some engines and by forced-colours modes, which would erase the word. */
.grad {
  color: var(--blue);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .grad {
    background: linear-gradient(
      100deg,
      var(--pink-ink) 0%,
      var(--lavender) 50%,
      var(--blue) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

@media (forced-colors: active) {
  .grad {
    background: none;
    color: CanvasText;
  }
}

.hero-sub {
  max-width: 780px;
  margin: 0 auto 26px;
  font-size: clamp(1.05rem, 2.1vw, 1.35rem);
  font-weight: 600;
  line-height: 1.42;
  letter-spacing: -0.01em;
}

.hero-authors {
  max-width: 800px;
  margin: 0 auto 8px;
  color: var(--text);
  font-size: 0.98rem;
}

/* The global reset makes links look like plain text, so an author homepage
   needs its own underline to read as clickable. */
.hero-authors a {
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
  transition: color 0.18s ease, text-decoration-color 0.18s ease;
}

.hero-authors a:hover {
  color: var(--blue);
  text-decoration-color: var(--blue);
}

.hero-affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 22px;
  margin: 0 auto 6px;
  color: var(--muted);
  font-size: 0.88rem;
}

.hero-corresponding {
  margin: 0 auto 22px;
  color: var(--muted);
  font-size: 0.82rem;
}

.hero-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  margin-bottom: 30px;
}

.hero-logos img {
  height: 52px;
  width: auto;
}

/* Wide wordmarks (ACE) need less height to carry the same optical weight
   as the square crests next to them. */
.hero-logos img.logo-wide {
  height: 34px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 44px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: none;
}

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

.btn-primary:hover {
  background: var(--blue-deep);
}

.btn-ghost {
  background: var(--panel);
  border-color: var(--line-strong);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--blue);
  color: var(--blue);
}

/* Placeholder until the preprint is posted and the code repo goes public. */
.btn-disabled {
  background: var(--panel);
  border-color: var(--line);
  color: var(--muted);
  cursor: default;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.hero-stats div {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.hero-stats b {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--pink-ink);
  font-variant-numeric: tabular-nums;
}

.hero-stats span {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

/* ---------- demo video ---------- */

.demo-section {
  padding: 64px 0 72px;
}

.video-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.video-card video {
  display: block;
  width: 100%;
  height: auto;
  background: var(--panel-2);
}

/* ---------- abstract ---------- */

.abstract-copy {
  max-width: 780px;
  margin: 0 auto;
}

.abstract-copy p {
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.78;
  text-align: justify;
  hyphens: auto;
}

/* ---------- method figure ---------- */

.figure {
  margin: 0;
}

.figure img {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.figure figcaption {
  /* same measure as .abstract-copy and .table-note */
  margin: 16px auto 0;
  max-width: 780px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.62;
  text-align: center;
}

/* ---------- qualitative grid ---------- */

.qualitative-grid-shell {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

/* Row 1 is the dataset badge, row 2 the task pills; both centred. */
.qualitative-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

/* All four datasets stay listed; the one on screen is the filled chip. */
.qualitative-dataset-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
}

.qualitative-grid-caption {
  flex: none;
  padding: 5px 13px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  transition: background 0.18s ease, color 0.18s ease;
}

.qualitative-grid-caption.is-active {
  background: var(--blue-soft);
  color: var(--blue-deep);
}

.qualitative-scene-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
}

/* One pill shared by the scene strip and the dataset tabs. */
.qualitative-scene,
.results-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.qualitative-scene:hover,
.results-tab:hover {
  border-color: var(--blue);
  color: var(--text);
}

.qualitative-scene.active,
.results-tab.active {
  background: var(--blue);
  border-color: transparent;
  color: #fff;
}

.qualitative-scene {
  padding: 6px 13px;
  font-size: 0.82rem;
}

.qualitative-scene-index {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
}

.qualitative-scene.active .qualitative-scene-index {
  color: #fff;
}

/* 1fr rows so both halves of the 8-method comparison share one tile height */
.qualitative-grid {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
}

.qualitative-grid-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.qualitative-thumb {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: 0;
  border: 0;
  background: none;
  text-align: center;
}

.qualitative-thumb-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.01em;
}

/* The two anchor tiles read the same way as the two anchor table rows:
   blue is what we are measured against, pink is us. */
.qualitative-thumb-gt .qualitative-thumb-label {
  color: var(--blue-deep);
  font-weight: 800;
}

.qualitative-thumb-label-ours {
  color: var(--pink-ink);
  font-weight: 800;
}

/* Fixed box: the seven scenes have three different aspects, and letting the
   clip drive the height made the document grow ~500px on every rotation. */
.qualitative-thumb-frame {
  position: relative;
  flex: none;
  aspect-ratio: 32 / 46;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, opacity 0.35s ease;
}

.qualitative-frame-ours {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px var(--pink-soft);
}

.qualitative-thumb-video {
  display: block;
  width: 100%;
}

/* Layered scene stack — JS strips [hidden] from all 7 videos per cell, so these
   two rules are the ONLY thing keeping the inactive scenes out of view. */
.qualitative-thumb-frame.is-layered .qualitative-thumb-video {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  pointer-events: none;
}

.qualitative-thumb-frame.is-layered .qualitative-thumb-video.is-active {
  z-index: 2;
  opacity: 1;
}

/* While the 56 clips settle the tiles hold their first frame; dim them a little
   so the pause reads as loading rather than as a stall. */
.qualitative-grid-shell.is-loading .qualitative-thumb-frame {
  opacity: 0.82;
}

.qualitative-grid-shell.is-loading .qualitative-thumb-frame.is-layered .qualitative-thumb-video {
  opacity: 0;
  transition: none;
}

.qualitative-grid-shell.is-loading .qualitative-thumb-frame.is-layered .qualitative-thumb-video.is-active {
  opacity: 1;
}

/* ---------- retargeting ---------- */

.retarget-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  align-items: stretch;
}

.retarget-rail {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.retarget-rail-title {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.retarget-thumbrail {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}

.retarget-thumb {
  position: relative;
  overflow: hidden;
  flex: 1;
  width: 100%;
  min-height: 0;
  aspect-ratio: 16 / 9;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  cursor: pointer;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.retarget-thumb:hover {
  border-color: var(--line-strong);
}

.retarget-thumb.active {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.retarget-thumb-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--panel-2);
}

.retarget-thumb-overlay {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 18px 9px 7px;
  background: linear-gradient(
    180deg,
    rgba(12, 22, 48, 0) 0%,
    rgba(12, 22, 48, 0.62) 38%,
    rgba(12, 22, 48, 0.92) 100%
  );
  color: #fff;
  text-shadow: 0 1px 2px rgba(12, 22, 48, 0.75);
  font-size: 0.68rem;
  font-weight: 600;
  text-align: left;
}

.retarget-thumb-index {
  font-family: var(--mono);
}

.retarget-carousel {
  min-width: 0;
}

.retarget-carousel-stage {
  position: relative;
}

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

.retarget-compare {
  --retarget-split: 50%;
}

.retarget-stage {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  cursor: ew-resize;
  /* vertical swipes still scroll the page; horizontal ones move the divider */
  touch-action: pan-y;
}

.retarget-video,
.retarget-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.retarget-video {
  display: block;
  object-fit: cover;
  pointer-events: none;
}

.retarget-video-original {
  background: var(--panel-2);
  object-position: center bottom;
}

/* The robot render occupies the RIGHT of the divider, so the on-stage
   "Original / Retargeted" chips match what is actually under them. */
.retarget-layer {
  overflow: hidden;
  background: var(--panel-2);
  clip-path: inset(0 0 0 var(--retarget-split));
  will-change: clip-path;
}

.retarget-video-robot {
  background: var(--panel-2);
  object-position: center center;
}

.retarget-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--retarget-split);
  z-index: 3;
  width: 2px;
  transform: translateX(-1px);
  background: linear-gradient(180deg, var(--pink), var(--blue));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.85);
  pointer-events: none;
}

.retarget-divider span {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 34px;
  height: 34px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 10px rgb(var(--ink-rgb) / 0.28);
}

.retarget-divider span::before,
.retarget-divider span::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transform: translateY(-50%);
}

.retarget-divider span::before {
  left: 9px;
  border-right: 5px solid var(--pink-ink);
}

.retarget-divider span::after {
  right: 9px;
  border-left: 5px solid var(--blue-deep);
}

.retarget-chip {
  position: absolute;
  bottom: 12px;
  z-index: 4;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  font-size: 0.72rem;
  font-weight: 700;
  pointer-events: none;
}

.retarget-chip-left {
  left: 12px;
  color: var(--pink-ink);
}

.retarget-chip-right {
  right: 12px;
  color: var(--blue-deep);
}

.retarget-play-state {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 2rem;
  opacity: 0;
  pointer-events: none;
  text-shadow: 0 2px 14px rgba(12, 22, 48, 0.5);
  transition: opacity 0.2s ease;
}

.retarget-compare.is-paused .retarget-play-state {
  opacity: 1;
}

/* ---------- results ---------- */

.results-copy-label {
  color: var(--text);
  font-weight: 700;
}

.results-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 22px;
}

.results-tab {
  padding: 8px 18px;
  font-size: 0.87rem;
}

.results-tab-tag {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--pink-soft);
  color: var(--pink-ink);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* a translucent white pill only reached 3.4:1 under its own label */
.results-tab.active .results-tab-tag {
  background: var(--blue-deep);
  color: #fff;
}

.results-carousel-stage {
  --from: 22px;
  position: relative;
}

/* JS sets panel.hidden = false on every panel and switches purely by class,
   so [hidden] must NOT collapse these and inactive panels stack absolutely.
   The outgoing table dissolves in place; only the incoming one is animated,
   sliding from whichever side you are travelling towards (--from, set by JS). */
.results-panel {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.24s ease, visibility 0s linear 0.24s;
}

.results-panel.active {
  position: relative;
  z-index: 2;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.24s ease, visibility 0s;
  animation: results-panel-in 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes results-panel-in {
  from {
    opacity: 0;
    transform: translateX(var(--from));
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.results-panel[hidden] {
  display: block;
}

.results-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.results-table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.results-table th,
.results-table td {
  padding: 11px 10px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.results-table th {
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.results-table td {
  font-variant-numeric: tabular-nums;
}

.results-table th:first-child,
.results-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  padding-left: 18px;
  border-right: 1px solid var(--line);
  background: var(--panel);
  text-align: left;
  white-space: nowrap;
}

.results-table thead th:first-child {
  z-index: 2;
  background: var(--panel-2);
}

.method-row.competitor td:first-child {
  background: var(--blue-soft);
}

.method-row.highlight td:first-child {
  background: var(--pink-soft);
}

.results-table tbody tr:last-child td {
  border-bottom: 0;
}

.method-row.competitor {
  background: var(--blue-soft);
}

.method-row.competitor td:first-child {
  color: var(--blue-deep);
  font-weight: 700;
  background: var(--blue-soft);
}

.method-row.highlight {
  background: var(--pink-soft);
}

.method-row.highlight td {
  font-weight: 700;
}

.method-row.highlight td:first-child {
  box-shadow: inset 4px 0 0 var(--pink);
  color: var(--pink-ink);
  background: var(--pink-soft);
}

.table-note {
  margin: 14px auto 0;
  max-width: 780px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 30px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-brand {
  font-weight: 800;
}

.footer-sub {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 400;
}

.footer-links {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--blue);
}

/* ---------- citation ---------- */

.citation-card {
  max-width: 880px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.citation-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}

.citation-label {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.citation-copy {
  padding: 5px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.citation-copy:hover,
.citation-copy.is-copied {
  border-color: var(--blue);
  color: var(--blue);
}

/* The longest BibTeX line is far wider than the card, so it scrolls inside the
   card rather than pushing the page sideways. */
.citation-card pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.75;
}

/* ---------- reveal on scroll ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1) var(--delay, 0ms),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1) var(--delay, 0ms);
}

.js .reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */

/* The example rail stays a left column for as long as it fits: at 1080px there
   is still room for 150px of rail beside the compare stage, and stacking it
   above the stage reads as a separate row rather than a picker. */
@media (max-width: 1180px) {
  .retarget-layout {
    grid-template-columns: 150px 1fr;
    gap: 16px;
  }
}


@media (max-width: 900px) {
  .section {
    padding: 60px 0;
  }

  .hero {
    padding: 56px 0 52px;
  }

  .hero-hands {
    display: none;
  }

  .site-nav {
    gap: 16px;
  }

  .site-nav a {
    font-size: 0.84rem;
  }

  .qualitative-grid-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-logos img {
    height: 42px;
  }

  .hero-logos img.logo-wide {
    height: 28px;
  }
}
@media (max-width: 860px) {
  .retarget-layout {
    grid-template-columns: 1fr;
  }

  .retarget-thumbrail {
    display: grid;
    flex: none;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 94px;
  }

  .header-inner {
    flex-wrap: wrap;
    row-gap: 10px;
    padding: 11px 18px;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    justify-content: space-between;
    gap: 10px;
    overflow-x: auto;
  }

  .site-nav a.active::after {
    bottom: -4px;
  }

  .container {
    padding: 0 18px;
  }

  .hero-stats {
    gap: 14px 26px;
  }

  .hero-stats b {
    font-size: 1.35rem;
  }

  .hero-logos {
    gap: 20px;
  }

  .abstract-copy p {
    text-align: left;
  }

  .retarget-thumbrail {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 380px) {
  /* five links no longer fit on one row; wrap rather than scroll off-screen */
  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 6px;
    overflow-x: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js .reveal,
  .js .reveal.visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}