/* ==========================================================================
   VideoMaMa++ — project page
   ========================================================================== */

:root {
  --bg:          #ffffff;
  --bg-soft:     #f6f8fa;
  --bg-sunk:     #eef1f5;
  --panel:       #ffffff;
  --border:      #dfe4ea;
  --border-soft: #e9edf2;

  --text:        #14181f;
  --text-muted:  #5b6572;
  --text-faint:  #8b95a3;

  --accent:      #2563eb;
  --accent-ink:  #1d4ed8;
  --ours:        #047857;
  --ours-soft:   #d6f3e7;

  --radius:      12px;
  --radius-sm:   8px;
  --maxw:        1180px;
  --maxw-text:   760px;

  --shadow-sm:   0 1px 2px rgba(16, 24, 40, .05);
  --shadow:      0 4px 16px rgba(16, 24, 40, .07);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:          #0e1116;
    --bg-soft:     #141920;
    --bg-sunk:     #10141a;
    --panel:       #161b22;
    --border:      #2a313c;
    --border-soft: #222831;

    --text:        #e6edf3;
    --text-muted:  #9aa6b4;
    --text-faint:  #6e7a89;

    --accent:      #6ea8fe;
    --accent-ink:  #8cbcff;
    --ours:        #34d399;
    --ours-soft:   #0f3b2e;

    --shadow-sm:   0 1px 2px rgba(0, 0, 0, .4);
    --shadow:      0 4px 16px rgba(0, 0, 0, .45);
  }
}

:root[data-theme="dark"] {
  --bg:          #0e1116;
  --bg-soft:     #141920;
  --bg-sunk:     #10141a;
  --panel:       #161b22;
  --border:      #2a313c;
  --border-soft: #222831;

  --text:        #e6edf3;
  --text-muted:  #9aa6b4;
  --text-faint:  #6e7a89;

  --accent:      #6ea8fe;
  --accent-ink:  #8cbcff;
  --ours:        #34d399;
  --ours-soft:   #0f3b2e;

  --shadow-sm:   0 1px 2px rgba(0, 0, 0, .4);
  --shadow:      0 4px 16px rgba(0, 0, 0, .45);
}

* { box-sizing: border-box; }

/* Root text size. Every rem-based size on the page scales from this one value,
   so text can be made bigger or smaller everywhere by changing it alone
   (16px is the browser default; 18px = +2px on body text). */
html { font-size: 18px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-ink); text-decoration: underline; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}
.wrap-text { max-width: var(--maxw-text); margin: 0 auto; }

/* ---------- Hero ---------------------------------------------------------- */

.hero {
  padding: 56px 0 28px;
  text-align: center;
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(1000px 420px at 50% -120px, var(--bg-soft), transparent 70%);
}

.venue {
  display: inline-block;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ours);
  background: var(--ours-soft);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}

/* Sized so the full ~80-character title fits one line of the 1148px content
   column on desktop (measured: 30px Source Serif 4 SemiBold = 1071px). Below
   ~810px wide it wraps; text-wrap: balance keeps the lines even. */
.hero h1 {
  font-family: var(--font-serif);
  /* px, not rem: pinned to the measured single-line fit, independent of the root size. */
  font-size: clamp(21.6px, 2.3vw, 30px);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -.02em;
  margin: 0 auto 22px;
  text-wrap: balance;
}
.hero h1 .plus { color: var(--ours); }

.authors {
  font-size: 1.02rem;
  margin: 0 auto 6px;
  max-width: 62ch;
  line-height: 2;
}
.authors a { color: var(--text); border-bottom: 1px solid var(--border); }
.authors a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }
.authors sup { color: var(--text-faint); font-size: .72em; padding-left: 1px; }

.affiliations {
  font-size: .9rem;
  color: var(--text-muted);
  margin: 0 auto 28px;
  max-width: 62ch;
}
.affiliations sup { color: var(--text-faint); }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: .92rem;
  font-weight: 500;
  border: 1px solid var(--text);
  transition: transform .12s ease, opacity .12s ease;
}
.btn:hover { opacity: .86; text-decoration: none; color: var(--bg); transform: translateY(-1px); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { color: var(--text); border-color: var(--text-muted); background: var(--bg-soft); }
.btn.disabled { opacity: .4; pointer-events: none; }
.btn svg { width: 16px; height: 16px; fill: currentColor; flex: none; }

.prequel {
  margin: 18px auto 0;
  font-size: .86rem;
  color: var(--text-muted);
}
.prequel a { font-weight: 500; }
.prequel-venue {
  display: inline-block;
  margin-left: 6px;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  vertical-align: 1px;
}

/* ---------- Sections ------------------------------------------------------ */

section { padding: 52px 0; border-bottom: 1px solid var(--border-soft); }
section:last-of-type { border-bottom: none; }

h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -.015em;
  margin: 0 0 20px;
  text-align: center;
}
h3 {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 10px;
}

.abstract p { margin: 0 0 1em; }
.abstract p:last-child { margin-bottom: 0; }

/* YouTube overview video, 16:9, text-column width. */
.yt-embed {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  box-shadow: var(--shadow-sm);
}
.yt-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* Collapsible abstract: the heading is the toggle. */
.abs-details > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  border-radius: var(--radius-sm);
}
.abs-details > summary::-webkit-details-marker { display: none; }
.abs-details > summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.abs-details > summary h2 { margin: 0; }
.abs-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  transition: color .15s ease, border-color .15s ease;
}
.abs-details > summary:hover .abs-toggle { color: var(--accent); border-color: var(--accent); }
.abs-toggle i {
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform .2s ease;
}
.abs-details[open] .abs-toggle i { transform: translateY(2px) rotate(-135deg); }
.abs-hide, .abs-details[open] .abs-show { display: none; }
.abs-details[open] .abs-hide { display: inline; }
.abs-body { padding-top: 20px; }
.abs-details[open] .abs-body { animation: abs-in .25s ease; }
@keyframes abs-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .abs-details[open] .abs-body { animation: none; }
  .abs-toggle i { transition: none; }
}

.caption {
  font-size: .88rem;
  color: var(--text-muted);
  text-align: center;
  margin: 12px auto 0;
  max-width: 70ch;
}
.caption strong { color: var(--text); font-weight: 600; }
/* Captions under a paper figure run the figure's full width. */
.caption.fig-caption { max-width: none; text-align: left; margin-top: 14px; line-height: 1.65; }

/* ---------- Teaser -------------------------------------------------------- */

.teaser-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.teaser-grid figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-sunk);
  box-shadow: var(--shadow-sm);
}
.teaser-grid figure.is-ours { border-color: var(--ours); }
.teaser-grid figcaption {
  padding: 8px 14px;
  font-size: .85rem;
  font-weight: 600;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.teaser-grid figure.is-ours figcaption { color: var(--ours); }
.teaser-grid video { display: block; width: 100%; height: auto; background: var(--bg-sunk); }

/* ---------- Hero pair: VideoMaMa vs VideoMaMa++ --------------------------- */

/* The three players break out of the text column so the footage is large.
   Width is the smallest of: --hp-maxw, the viewport less a gutter, and the
   width at which a tile would be --hp-maxh tall for this clip's aspect ratio
   (--ar, set by pair.js), so tall portrait clips still fit on screen. */
.hp-stage {
  --ar: 1.7778;
  --hp-gap: 14px;
  --hp-maxw: 1800px;
  --hp-maxh: 72vh;
  --hp-w: min(var(--hp-maxw), calc(100vw - 48px), calc(3 * var(--hp-maxh) * var(--ar) + 2 * var(--hp-gap)));
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--hp-gap);
  width: var(--hp-w);
  margin: 0 calc((100% - var(--hp-w)) / 2);
}
.hp-tile {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-sunk);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.hp-tile.is-ours { border-color: var(--ours); box-shadow: 0 0 0 1px var(--ours) inset, var(--shadow-sm); }
.hp-cap {
  padding: 8px 14px;
  font-size: .85rem;
  font-weight: 600;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.hp-tile.is-ours .hp-cap { color: var(--ours); }
.hp-badge {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  white-space: nowrap;
}
.hp-tile.is-ours .hp-badge { color: var(--ours); border-color: var(--ours); }
.hp-vid { position: relative; cursor: pointer; background: var(--bg-sunk); }
.hp-vid video { display: block; width: 100%; height: auto; background: var(--bg-sunk); }
.hp-play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  opacity: 0;
  transition: opacity .18s ease;
  pointer-events: none;
}
.hp-tile.paused .hp-play { opacity: 1; }
.hp-disc {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, .55);
  color: #fff;
  font-size: 20px;
  padding-left: 4px;
}

/* Big "what to look for" line above the hero players. */
.hp-callout {
  max-width: 900px;
  margin: 0 auto 26px;
  text-align: center;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 1rem + 1vw, 1.7rem);
  line-height: 1.35;
  color: var(--text);
  text-wrap: balance;
}
.hp-callout strong { font-weight: 600; }
.hp-callout strong.ours { color: var(--ours); }

@media (max-width: 720px) {
  .hp-stage { grid-template-columns: 1fr; width: auto; margin: 0; }
}

/* ---------- Placeholder figure box ---------------------------------------- */

.figure-placeholder {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: .92rem;
}
.figure-placeholder code {
  font-family: var(--font-mono);
  font-size: .85em;
  background: var(--bg-sunk);
  border: 1px solid var(--border-soft);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-muted);
}

/* ---------- Comparison viewer --------------------------------------------- */

.viewer { background: var(--bg-soft); }

.viewer-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}
.viewer-bar .carousel-nav { margin: 0; width: 100%; }
.viewer-bar .counter {
  font-variant-numeric: tabular-nums;
  font-size: .82rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.icon-btn {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 7px 11px;
  font-size: .9rem;
  cursor: pointer;
  line-height: 1;
}
.icon-btn:hover { background: var(--bg-sunk); }
.play-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 8px 18px;
}
.play-btn:hover { background: var(--accent-ink); border-color: var(--accent-ink); }

.method-toggles { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 20px; }
.method-toggles label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  font-size: .85rem;
  cursor: pointer;
  user-select: none;
  transition: background .12s ease, color .12s ease, border-color .12s ease;
}
.method-toggles label:hover { border-color: var(--text-faint); }
.method-toggles label.on { background: var(--text); border-color: var(--text); color: var(--bg); }
.method-toggles label.on.is-ours { background: var(--ours); border-color: var(--ours); color: #fff; }
.method-toggles input { position: absolute; opacity: 0; pointer-events: none; }

.row-block { margin-bottom: 26px; }
.row-block:last-child { margin-bottom: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr));
  gap: 12px;
}
.grid.inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 620px; }

.tile {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.tile.is-ours { border-color: var(--ours); box-shadow: 0 0 0 1px var(--ours) inset, var(--shadow-sm); }
.tile-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  font-size: .85rem;
  font-weight: 600;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
}
.tile.is-ours .tile-head { color: var(--ours); }
.tile-head .badge {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  white-space: nowrap;
}
.tile.is-ours .tile-head .badge { color: var(--ours); border-color: var(--ours); }

.vid {
  position: relative;
  aspect-ratio: var(--video-ar, 1.7778);
  max-height: 62vh;
  background: var(--bg-sunk);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.vid video { width: 100%; height: 100%; object-fit: contain; background: var(--bg-sunk); display: block; }
.vid .overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s ease;
}
.vid.paused .overlay { opacity: 1; }
.vid .overlay .disc {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(0, 0, 0, .55);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px;
  padding-left: 3px;
}
.vid .na {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-faint);
  font-size: .9rem;
}

.timeline {
  position: sticky;
  bottom: 0;
  z-index: 40;
  margin-top: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow);
}
.timeline input[type="range"] { flex: 1; min-width: 0; accent-color: var(--accent); }

.hint {
  font-size: .8rem;
  color: var(--text-faint);
  text-align: center;
  margin-top: 12px;
}
.kbd {
  font-family: var(--font-mono);
  font-size: .76rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--text-muted);
}

/* ---------- Results table ------------------------------------------------- */

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.results {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  font-variant-numeric: tabular-nums;
}
table.results th, table.results td {
  padding: 9px 14px;
  text-align: right;
  border-bottom: 1px solid var(--border-soft);
  white-space: nowrap;
}
table.results th:first-child, table.results td:first-child { text-align: left; }
table.results thead th {
  font-size: .74rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
table.results tbody tr.is-ours { background: var(--ours-soft); }
table.results tbody tr.is-ours td { font-weight: 600; color: var(--text); border-bottom-color: var(--border); }
table.results tbody tr.is-ours td:first-child { color: var(--ours); }

/* Table 1: grouped benchmark headers, best baseline underlined. */
table.results.t1 { font-size: .84rem; }
table.results.t1 th, table.results.t1 td { padding: 8px 10px; }
table.results.t1 thead th.grp {
  text-align: center;
  color: var(--text);
  letter-spacing: .04em;
  border-bottom: 1px solid var(--border-soft);
}
table.results.t1 .gstart { border-left: 1px solid var(--border); }
table.results td.second, .second-key { text-decoration: underline; text-underline-offset: 3px; }
table.results.compact { font-size: .84rem; }
table.results.compact th, table.results.compact td { padding: 7px 10px; }
table.results td.sub {
  text-align: left;
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-top: 12px;
}

/* ---------- Paper figures ------------------------------------------------- */

.paper-fig {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  background: #fff;
}

img.paper-fig { cursor: zoom-in; transition: box-shadow .15s ease; }
img.paper-fig:hover { box-shadow: var(--shadow); }
img.paper-fig:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- Figure zoom viewer (lightbox.js) ----------------------------- */

html.lb-open, html.lb-open body { overflow: hidden; }
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 48px 24px;
  background: rgba(8, 10, 14, .9);
  cursor: zoom-out;
}
.lightbox[hidden] { display: none; }
.lb-img {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 96px);
  width: auto;
  height: auto;
  background: #fff;
  border-radius: 6px;
  user-select: none;
}
.lb-close {
  position: absolute;
  top: 12px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .25);
  background: rgba(0, 0, 0, .4);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}
.lb-close:hover { background: rgba(255, 255, 255, .15); }
.lb-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  margin: 0;
  text-align: center;
  font-size: .78rem;
  color: rgba(255, 255, 255, .7);
  pointer-events: none;
}

/* ---------- Highlights ---------------------------------------------------- */

.highlights {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.hl {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.hl-k {
  display: block;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ours);
  margin-bottom: 8px;
}
.hl p { margin: 0; font-size: .92rem; color: var(--text-muted); line-height: 1.6; }
.hl p strong { color: var(--text); font-weight: 600; }

/* ---------- Method notes -------------------------------------------------- */

.note {
  max-width: 820px;
  margin: 30px auto 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: .9rem;
  color: var(--text-muted);
}
.note strong { color: var(--text); }
.impl {
  text-align: center;
  font-size: .84rem;
  color: var(--text-faint);
  margin: 22px auto 0;
  max-width: 80ch;
}
.impl strong { color: var(--text-muted); }

/* ---------- Stat cards (chunk-boundary section) ---------------------------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.stat {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.stat-k {
  display: block;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.stat-v {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 8px 0 10px;
  font-variant-numeric: tabular-nums;
}
.stat-v .before { font-size: 1.15rem; color: var(--text-faint); text-decoration: line-through; text-decoration-thickness: 1px; }
.stat-v .arrow { color: var(--text-faint); font-size: .9rem; }
.stat-v .after { font-size: 1.7rem; font-weight: 600; color: var(--ours); }
.stat p { margin: 0; font-size: .86rem; color: var(--text-muted); line-height: 1.6; }
.stat p strong { color: var(--text); }

.anchor-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  margin-top: 34px;
}

/* ---------- Ablation mini tables ----------------------------------------- */

.mini-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.mini {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.mini table { width: 100%; }
.mini p { margin: 10px 0 0; font-size: .82rem; color: var(--text-muted); line-height: 1.55; }

@media (max-width: 980px) {
  .mini-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .anchor-row { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .highlights, .stat-grid, .mini-grid { grid-template-columns: 1fr; }
}

/* ---------- BibTeX -------------------------------------------------------- */

.bibtex-wrap { position: relative; }
pre.bibtex {
  background: var(--bg-sunk);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
}
.copy-btn {
  position: absolute;
  top: 10px; right: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 5px 11px;
  font-size: .78rem;
  cursor: pointer;
}
.copy-btn:hover { color: var(--text); border-color: var(--text-faint); }

/* ---------- Footer -------------------------------------------------------- */

/* ---------- Theme toggle -------------------------------------------------- */

.theme-toggle {
  position: fixed;
  top: 14px; right: 14px;
  z-index: 80;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  box-shadow: var(--shadow-sm);
}
.theme-toggle:hover { color: var(--text); }

/* ---------- Responsive ---------------------------------------------------- */

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .hero { padding: 40px 0 24px; }
  section { padding: 38px 0; }
  .teaser-grid { grid-template-columns: 1fr; }
  .grid, .grid.inputs { grid-template-columns: 1fr; }
  .timeline { flex-wrap: wrap; }
  .theme-toggle { top: 8px; right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ==========================================================================
   Drag-divider video comparison
   ========================================================================== */

.vslider {
  --vs-pos: 50%;
  --vs-ar: 1.7778;
  position: relative;
  aspect-ratio: var(--vs-ar);
  max-height: 70vh;
  margin: 0 auto;
  background: var(--bg-sunk);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  touch-action: pan-y;
  isolation: isolate;
}

.vslider video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--bg-sunk);
  display: block;
}

/* Front layer holds the "ours" video and is clipped to the right of the
   divider. clip-path keeps the video itself unscaled, so both sides stay
   pixel-aligned at every divider position. */
.vslider .vs-front {
  position: absolute;
  inset: 0;
  clip-path: inset(0 0 0 var(--vs-pos));
  will-change: clip-path;
}

/* Divider */
.vslider .vs-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--vs-pos);
  width: 0;
  z-index: 3;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.vslider .vs-handle::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1.5px;
  width: 3px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .28), 0 0 12px rgba(0, 0, 0, .35);
}
.vslider .vs-grip {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  color: #14181f;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  letter-spacing: -1px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .35), 0 0 0 1px rgba(0, 0, 0, .1);
}

/* Corner labels */
.vslider .vs-tag {
  position: absolute;
  bottom: 12px;
  z-index: 4;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  color: #fff;
  background: rgba(10, 14, 20, .72);
  backdrop-filter: blur(6px);
  pointer-events: none;
  white-space: nowrap;
  max-width: 45%;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vslider .vs-tag-l { left: 12px; }
.vslider .vs-tag-r { right: 12px; }
.vslider .vs-tag.is-ours { background: var(--ours); color: #fff; }

/* Play affordance */
.vslider .vs-play {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s ease;
}
.vslider.paused .vs-play { opacity: 1; }
.vslider .vs-disc {
  width: 58px; height: 58px;
  border-radius: 50%;
  background: rgba(0, 0, 0, .55);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 21px;
  padding-left: 4px;
}

/* The range input IS the drag surface: invisible, full-bleed, native a11y. */
.vslider .vs-range {
  position: absolute;
  inset: 0;
  z-index: 5;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  opacity: 0;
  cursor: ew-resize;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}
.vslider .vs-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 48px;
  height: 100vh;
  cursor: ew-resize;
}
.vslider .vs-range::-moz-range-thumb {
  width: 48px;
  height: 100vh;
  border: 0;
  border-radius: 0;
  background: transparent;
  cursor: ew-resize;
}
.vslider .vs-range:focus-visible { outline: none; }
.vslider:has(.vs-range:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Slider section chrome ----------------------------------------- */

.slider-section { background: var(--bg-soft); }

.sc-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  justify-content: center;
  margin-bottom: 20px;
}
.sc-controls .ctl { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.sc-controls .ctl > span {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.sc-controls select {
  font-size: .88rem;
  padding: 8px 11px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  max-width: 300px;
}

.seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--panel);
}
.seg button {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: .85rem;
  font-family: inherit;
  padding: 9px 15px;
  cursor: pointer;
  white-space: nowrap;
}
.seg button + button { border-left: 1px solid var(--border); }
.seg button:hover { background: var(--bg-soft); color: var(--text); }
.seg button.on { background: var(--text); color: var(--bg); }

.sc-stage { max-width: 1000px; margin: 0 auto; }

.sc-transport {
  max-width: 1000px;
  margin: 14px auto 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}
.sc-transport input[type="range"] { flex: 1; min-width: 0; accent-color: var(--accent); }

@media (max-width: 640px) {
  .sc-controls { flex-direction: column; align-items: stretch; }
  .sc-controls select, .sc-controls .seg { max-width: none; width: 100%; }
  .seg button { flex: 1; }
  .vslider .vs-grip { width: 38px; height: 38px; }
  .vslider .vs-tag { font-size: .72rem; padding: 4px 9px; bottom: 8px; }
  .sc-transport { flex-wrap: wrap; }
}


/* ==========================================================================
   Carousel dot navigation
   ========================================================================== */

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 16px auto 0;
  max-width: 1000px;
}

.icon-btn.round {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

.dots {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 0;
}

/* Dots carry position only — never a clip name. */
.dots .dot {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: var(--border);
  cursor: pointer;
  transition: width .2s ease, background .2s ease, transform .12s ease;
  flex: none;
}
.dots .dot:hover { background: var(--text-faint); transform: scale(1.25); }
.dots .dot.on {
  width: 26px;
  background: var(--ours);
  transform: none;
}
.dots .dot:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Direction-aware slide when the clip changes. */
@keyframes vmppSlideNext {
  from { opacity: 0; transform: translateX(2.5%); }
  to   { opacity: 1; transform: none; }
}
@keyframes vmppSlidePrev {
  from { opacity: 0; transform: translateX(-2.5%); }
  to   { opacity: 1; transform: none; }
}
.slide-next { animation: vmppSlideNext .34s cubic-bezier(.22, .61, .36, 1); }
.slide-prev { animation: vmppSlidePrev .34s cubic-bezier(.22, .61, .36, 1); }

@media (prefers-reduced-motion: reduce) {
  .slide-next, .slide-prev { animation: none; }
  .dots .dot { transition: none; }
}

@media (max-width: 640px) {
  .carousel-nav { gap: 10px; }
  .dots { gap: 6px; }
  .dots .dot { width: 8px; height: 8px; }
  .dots .dot.on { width: 20px; }
}