@font-face {
  font-family: "RoboSnap Serif";
  src: url("../fonts/cormorant-garamond-700.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --sun: #ffda68;
  --robosnap-yellow: #ffda67;
  --robosnap-shadow: #6f8f4e;
  --olive: #6f8f4e;
  --blush: #ffe6e4;
  --sky: #9fc5e8;
  --ice: #d0e2f3;
  --ink: #18232f;
  --text: #26323d;
  --muted: #65727b;
  --surface: #ffffff;
  --surface-soft: #f7faf5;
  --surface-blue: #edf5fc;
  --surface-warm: #fff8df;
  --cyan-wash: rgba(136, 211, 185, 0.05);
  --line: #d7e0d0;
  --line-strong: #a9bea0;
  --danger: #b95c52;
  --success: #507f48;
  --shadow-sm: 0 6px 18px rgba(24, 35, 47, 0.08);
  --shadow-md: 0 16px 40px rgba(24, 35, 47, 0.12);
  --radius: 8px;
  --transition: 180ms ease;
  --content-frame-width: min(944px, 100%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface-soft);
  color: var(--text);
  font-family: "Noto Sans", Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--olive);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

code,
pre {
  font-family: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 2000;
  transform: translateY(-150%);
  background: var(--ink);
  color: white;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.container.narrow {
  width: min(860px, calc(100% - 40px));
}

.container > :is(
  .section-heading,
  .wide-video,
  .teaser-figure-card,
  .method-figure,
  .method-grid,
  .scene-pair-panel,
  .method-support-grid,
  .layer-stack-demo,
  .viewer-layout,
  .results-layout,
  .tabs,
  .tab-group,
  .callout-grid,
  .media-grid,
  .perturbation-grid,
  .stat-band,
  .subsection-title,
  .bibtex-header,
  .resource-list
),
.container > #bibtex-code {
  width: var(--content-frame-width);
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding: 5rem 0;
}

.section:nth-of-type(odd) {
  background: var(--surface);
}

.section-heading {
  margin-bottom: 2.75rem;
}

.section-heading.compact {
  margin-bottom: 1.15rem;
}

.section-kicker {
  margin: 0 0 0.55rem;
  color: var(--olive);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  font-size: 1.28rem;
}

.section-title {
  margin: 0;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 2.15rem;
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: 0;
}

.robosnap-shadow-text {
  color: var(--robosnap-yellow);
  font-weight: 800;
  text-shadow:
    -0.065em 0 0 var(--robosnap-shadow),
    -0.05em 0 0 var(--robosnap-shadow),
    -0.035em 0 0 var(--robosnap-shadow),
    -0.02em 0 0 var(--robosnap-shadow);
}

.robosnap-shadow-text.compact-shadow {
  font-weight: 800;
  text-shadow:
    -0.045em 0 0 var(--robosnap-shadow),
    -0.032em 0 0 var(--robosnap-shadow),
    -0.02em 0 0 var(--robosnap-shadow);
}

.section-lead,
.lead {
  color: var(--muted);
  font-size: 1.06rem;
  max-width: 840px;
  margin: 0.85rem 0 0;
}

.section-title + .section-lead {
  margin-top: 4.55rem;
}

.section-lead + .section-lead {
  margin-top: 0.8rem;
}

.subsection-title {
  margin: 3rem auto 1.2rem;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 1.45rem;
  letter-spacing: 0;
}

.data-aug-heading {
  margin-top: 8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.72rem 1.05rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button.primary {
  background: var(--sun);
  border-color: #e9bf3d;
  box-shadow: var(--shadow-sm);
}

.button.secondary {
  background: var(--olive);
  color: white;
  box-shadow: var(--shadow-sm);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.74);
  border-color: rgba(111, 143, 78, 0.42);
}

.paper-button,
.code-button {
  background: var(--robosnap-yellow);
  border-color: #e8be3d;
  box-shadow: var(--shadow-sm);
}

.video-button,
.dataset-button {
  background: var(--olive);
  color: white;
  border-color: var(--olive);
  box-shadow: var(--shadow-sm);
}

.button.is-disabled {
  cursor: default;
}

.button.is-disabled:hover {
  transform: none;
  text-decoration: none;
}

.button small {
  margin-left: 0.42rem;
  padding-left: 0.42rem;
  border-left: 1px solid rgba(24, 35, 47, 0.22);
  font-size: 0.76rem;
  font-weight: 700;
  opacity: 0.78;
}

.dataset-button small {
  border-left-color: rgba(255, 255, 255, 0.34);
}

.progress-sidebar {
  --reading-progress: 0;
  position: fixed;
  left: 1.1rem;
  top: 50%;
  z-index: 500;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.68rem;
  padding: 0.85rem 0.75rem 0.85rem 1.08rem;
}

.progress-sidebar::before,
.progress-sidebar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 3px;
  border-radius: 999px;
}

.progress-sidebar::before {
  bottom: 0.75rem;
  background: rgba(111, 143, 78, 0.18);
}

.progress-sidebar::after {
  bottom: 0.75rem;
  background: linear-gradient(180deg, var(--robosnap-yellow) 0%, var(--olive) 100%);
  transform: scaleY(var(--reading-progress));
  transform-origin: top;
  transition: transform 120ms ease-out;
}

.progress-item {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: rgba(38, 50, 61, 0.64);
  font-size: 1rem;
  font-weight: 700;
  transition: color var(--transition), transform var(--transition);
}

.progress-item:hover {
  color: var(--olive);
  text-decoration: none;
  transform: translateX(2px);
}

.progress-item span {
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 999px;
  border: 2px solid rgba(111, 143, 78, 0.34);
  background: var(--surface);
}

.progress-item.is-active {
  color: var(--ink);
}

.progress-item.is-active span {
  background: var(--sun);
  border-color: var(--olive);
}

.scroll-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 600;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(111, 143, 78, 0.24);
  background: var(--olive);
  color: white;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  box-shadow: var(--shadow-sm);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-2px);
}

.hero {
  position: relative;
  min-height: 84vh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 8rem 0 4.5rem;
  background: var(--ice);
}

.hero-bg,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-bg {
  background-image: url("../robosnap/images/scenes/scene09_composed.png");
  background-size: cover;
  background-position: center;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0.82) 48%, rgba(255, 255, 255, 0.28) 100%),
    linear-gradient(0deg, rgba(255, 248, 223, 0.58) 0%, rgba(208, 226, 243, 0.16) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.venue {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin: 0 0 1rem;
  padding: 0.28rem 0.72rem;
  background: rgba(255, 218, 104, 0.92);
  border: 1px solid rgba(111, 143, 78, 0.2);
  border-radius: 999px;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
}

.hero h1 {
  max-width: 1000px;
  margin: 0;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 6rem;
  line-height: 0.95;
  letter-spacing: 0;
  font-weight: 700;
}

.hero-logo-text {
  display: inline-block;
  font-style: normal;
  transform: none;
}

.hero-paper-title {
  max-width: 980px;
  margin: 0.85rem 0 0;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 2.25rem;
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: 0;
}

.teaser-serif-title {
  position: relative;
  z-index: 0;
  width: fit-content;
  max-width: min(920px, calc(100% - 2rem));
  margin: 0.25rem auto 2.2rem;
  padding: 0 0.18rem;
  color: #34424f;
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 2.05rem;
  line-height: 1.08;
  font-weight: 700;
  text-align: center;
}

.teaser-serif-title::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.02em;
  z-index: -1;
  width: calc(100% + 1.15rem);
  height: 0.62em;
  transform: translateX(-50%);
  border-radius: 5px;
  background: rgba(255, 218, 103, 0.2);
}

.authors {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.1rem;
  margin-top: 1.2rem;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 600;
}

.publication-authors {
  max-width: 960px;
}

.publication-authors a,
.affiliations a {
  color: var(--ink);
  border-bottom: 1px solid rgba(111, 143, 78, 0.35);
}

.publication-authors a:hover,
.affiliations a:hover {
  color: var(--olive);
  text-decoration: none;
  border-bottom-color: var(--olive);
}

.authors .affiliation {
  color: var(--muted);
  font-weight: 500;
}

.affiliations,
.author-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  max-width: 980px;
  margin-top: 0.75rem;
  color: var(--muted);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 0.96rem;
  font-weight: 500;
}

.affiliations sup,
.author-notes sup {
  margin-right: 0.15rem;
}

.author-notes {
  margin-top: 0.35rem;
  font-size: 0.88rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.55rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 920px;
  margin-top: 2rem;
}

.hero-metrics div,
.stat-band div,
.callout {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(111, 143, 78, 0.2);
  border-radius: var(--radius);
  padding: 0.85rem 0.9rem;
  box-shadow: var(--shadow-sm);
}

.hero-metrics strong,
.stat-band strong {
  display: block;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 1.45rem;
  line-height: 1.1;
}

.hero-metrics strong.robosnap-shadow-text,
.stat-band strong.robosnap-shadow-text {
  color: var(--robosnap-yellow);
}

.metric-arrow {
  display: inline-block;
  font-weight: 900;
  font-size: 1.16em;
  line-height: 0.8;
  -webkit-text-stroke: 0.018em currentColor;
}

.hero-metrics span,
.stat-band span,
.callout span {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-metrics span {
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 1.16rem;
  line-height: 1.15;
}

.teaser-band {
  padding: 2rem 0 4.5rem;
  background: var(--surface);
}

.video-band {
  padding-bottom: 2.6rem;
}

.teaser-figure-band {
  padding: 0.2rem 0 3.4rem;
}

.teaser-figure-card {
  width: 100%;
  margin: 0 auto;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.teaser-figure-band .teaser-figure-card {
  width: 100%;
  margin-bottom: 0;
}

.teaser-figure-card img {
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
  background: transparent;
  border-radius: 0;
}

.abstract-teaser-figure {
  width: 78%;
  margin: 5.2rem auto 1.55rem;
}

.abstract-teaser-figure img {
  opacity: 0.7;
}

.teaser-figure-caption {
  white-space: nowrap;
  font-size: clamp(0.78rem, 2.2vw, 0.92rem);
}

.wide-video,
.media-card,
.image-card,
.perturbation-grid figure {
  margin: 0;
}

.wide-video {
  margin-inline: auto;
}

.wide-video iframe,
.wide-video video,
.video-poster,
.video-poster-button {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  background: #111820;
  border: 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.wide-video iframe,
.wide-video video {
  object-fit: contain;
}

.video-poster {
  position: relative;
  overflow: hidden;
}

.video-poster-button {
  position: relative;
  padding: 0;
  cursor: pointer;
  overflow: hidden;
}

.video-poster-button img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-play-icon {
  position: absolute;
  left: 50%;
  top: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(58px, 8vw, 92px);
  height: clamp(58px, 8vw, 92px);
  transform: translate(-50%, -50%);
  border-radius: 999px;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(255, 218, 103, 0.96), rgba(136, 211, 185, 0.88));
  box-shadow:
    0 18px 38px rgba(0, 0, 0, 0.28),
    0 0 0 8px rgba(255, 255, 255, 0.16);
  font-size: clamp(1.25rem, 2.6vw, 2rem);
  transition: transform var(--transition), box-shadow var(--transition);
}

.video-poster-button:hover .video-play-icon,
.video-poster-button:focus-visible .video-play-icon {
  transform: translate(-50%, -50%) scale(1.06);
  box-shadow:
    0 22px 46px rgba(0, 0, 0, 0.32),
    0 0 0 10px rgba(255, 218, 103, 0.18);
}

.video-poster-button:focus-visible {
  outline: 3px solid rgba(255, 218, 103, 0.92);
  outline-offset: 4px;
}

figcaption,
.wide-video figcaption {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.abstract-section {
  padding: 5.7rem 0 2.6rem;
}

.abstract-section .section-title {
  margin-bottom: 2rem;
}

.abstract-section .lead {
  margin-top: 0;
}

.abstract-section p:not(.section-kicker):not(.lead) {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.65;
}

.method-section {
  background: var(--surface);
}

#method .section-heading {
  margin-bottom: 6.5rem;
}

.method-figure {
  margin: 0 auto 1.35rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.container > .method-figure {
  width: var(--content-frame-width);
}

.method-figure img {
  display: block;
  width: 100%;
  max-height: none;
  object-fit: contain;
  background: transparent;
  border-radius: 0;
}

.method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.method-layer-band {
  width: 100vw;
  max-width: 100vw;
  margin: 0 calc(50% - 50vw);
  padding: 1.35rem 0 1.6rem;
  background: rgba(255, 218, 103, 0.3);
}

.method-layer-band > :is(.method-grid, .layer-stack-demo, .scene-pair-panel) {
  width: var(--content-frame-width);
  margin-left: auto;
  margin-right: auto;
}

.method-refinement-band {
  width: 100vw;
  max-width: 100vw;
  margin: 0 calc(50% - 50vw);
  padding: 1.35rem 0 1.55rem;
  background: rgba(111, 143, 78, 0.3);
}

.method-refinement-band > .method-card {
  width: var(--content-frame-width);
  margin-left: auto;
  margin-right: auto;
}

.method-application-band {
  width: 100vw;
  max-width: 100vw;
  margin: 0 calc(50% - 50vw);
  padding: 1.55rem 0 4.4rem;
  background: linear-gradient(180deg, rgba(136, 211, 185, 0.3) 0%, rgba(136, 211, 185, 0.24) 42%, rgba(136, 211, 185, 0.12) 74%, rgba(255, 255, 255, 0) 100%);
}

.method-application-inner {
  width: var(--content-frame-width);
  margin-left: auto;
  margin-right: auto;
}

.method-card {
  position: relative;
  min-height: 0;
  background: rgba(255, 218, 103, 0.2);
  border-radius: var(--radius);
  padding: 1.35rem 1.45rem;
  overflow: hidden;
}

.method-card-primary {
  background: rgba(255, 218, 103, 0.3);
}

.method-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 255, 255, 0.48), transparent 32%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 56%);
  pointer-events: none;
}

.method-card > * {
  position: relative;
  z-index: 1;
}

.method-card-heading {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.65rem;
}

.method-card-refinement {
  background: rgba(255, 255, 255, 0.58);
}

.method-card-refinement .step-label {
  background: var(--olive);
  color: white;
}

.method-application-kicker {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 1.18rem;
  font-weight: 800;
}

.method-application-kicker .step-label {
  background: #88d3b9;
  color: var(--ink);
}

.method-application-inner h3 {
  margin: 0.95rem 0 0;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: clamp(1.45rem, 3.2vw, 2.35rem);
  line-height: 1.08;
  letter-spacing: 0;
  text-align: center;
}

.step-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: var(--sun);
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
}

.method-card h3 {
  margin: 0;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 1.18rem;
  line-height: 1.18;
  letter-spacing: 0;
}

.method-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.method-card p + p {
  margin-top: 0.65rem;
}

.method-points {
  display: grid;
  gap: 0.38rem;
  margin: 0.9rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.method-points li::marker {
  color: var(--leaf);
}

.method-support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.2rem;
}

.method-preview-card {
  margin: 1rem 0 0;
  padding: 0.62rem;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.6);
  box-shadow:
    0 18px 48px rgba(111, 143, 78, 0.18),
    0 0 34px rgba(255, 218, 103, 0.2);
  backdrop-filter: blur(10px);
}

.method-preview-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin: 0;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.method-refinement-videos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1rem;
}

.method-refinement-video {
  min-width: 0;
  margin: 0;
  padding: 0.42rem;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.58);
  box-shadow:
    0 12px 28px rgba(28, 39, 32, 0.1),
    0 0 20px rgba(136, 211, 185, 0.14);
}

.method-refinement-video video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.method-refinement-video figcaption {
  margin-top: 0.42rem;
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 0.92rem;
  line-height: 1.12;
}

.media-grid {
  display: grid;
  gap: 1rem;
}

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

.media-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.media-card,
.image-card {
  background: var(--surface);
  border: 1px solid rgba(111, 143, 78, 0.18);
  border-radius: var(--radius);
  padding: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.media-card.accent,
.image-card.accent {
  border-color: rgba(111, 143, 78, 0.48);
  background: #fbfdf8;
}

.media-card.warning,
.image-card.warning {
  border-color: rgba(185, 92, 82, 0.28);
  background: #fff7f6;
}

.media-card video,
.media-card img,
.image-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.image-card img {
  background: var(--surface-warm);
}

.layer-stack-demo {
  width: var(--content-frame-width);
  max-width: 1040px;
  margin: 0 auto 1.35rem;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.08fr);
  gap: 1rem;
  align-items: stretch;
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 218, 103, 0.28), rgba(255, 218, 103, 0.12)),
    rgba(255, 255, 255, 0.62);
  box-shadow:
    0 18px 48px rgba(255, 218, 103, 0.18),
    0 0 34px rgba(255, 218, 103, 0.2);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.layer-source-card {
  position: relative;
  display: block;
  width: 100%;
  min-height: 0;
  padding: 0.7rem;
  border: 1px solid rgba(255, 218, 103, 0.36);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 14px 30px rgba(28, 39, 32, 0.12);
  cursor: pointer;
  overflow: hidden;
}

.layer-source-card::after {
  content: "";
  position: absolute;
  inset: 0.7rem;
  border-radius: 6px;
  box-shadow: inset 0 0 0 2px rgba(255, 218, 103, 0);
  transition: box-shadow var(--transition);
  pointer-events: none;
}

.layer-source-card:hover::after,
.layer-source-card:focus-visible::after,
.layer-stack-demo.is-expanded .layer-source-card::after {
  box-shadow: inset 0 0 0 2px rgba(255, 218, 103, 0.86);
}

.layer-source-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
}

.layer-source-card span {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.34rem 0.5rem;
  border-radius: 6px;
  color: var(--ink);
  background: rgba(255, 218, 103, 0.88);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(28, 39, 32, 0.12);
}

.layer-source-card em {
  position: absolute;
  right: 1rem;
  top: 1rem;
  padding: 0.34rem 0.52rem;
  border-radius: 999px;
  color: white;
  background: rgba(17, 24, 32, 0.78);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 0.86rem;
  font-style: normal;
  font-weight: 800;
  box-shadow:
    0 10px 22px rgba(17, 24, 32, 0.18),
    0 0 0 1px rgba(255, 218, 103, 0.48);
}

.layer-stack-output {
  position: relative;
  min-width: 0;
  border: 1px solid rgba(255, 218, 103, 0.34);
  border-radius: 8px;
  background:
    linear-gradient(45deg, rgba(255, 218, 103, 0.16) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 218, 103, 0.16) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 218, 103, 0.16) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 218, 103, 0.16) 75%),
    rgba(255, 255, 255, 0.42);
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
  overflow: hidden;
  cursor: ns-resize;
  touch-action: none;
  overscroll-behavior: contain;
}

.layer-stack-output::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 218, 103, 0.16), transparent 32%),
    radial-gradient(circle at 82% 72%, rgba(255, 218, 103, 0.18), transparent 34%);
  pointer-events: none;
}

.layer-stack-stage {
  position: relative;
  height: 100%;
  min-height: 285px;
  perspective: 1100px;
  transform-style: preserve-3d;
  will-change: opacity, transform;
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 360ms ease, transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.layer-stack-demo.is-expanded .layer-stack-stage {
  opacity: 1;
  transform: translateX(0);
}

.layer-card {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(78%, 430px);
  margin: 0;
  padding: 0.3rem;
  border: 2px solid rgba(255, 218, 103, 0.74);
  border-radius: 8px;
  background: transparent;
  box-shadow:
    0 16px 34px rgba(28, 39, 32, 0.22),
    0 0 0 1px rgba(255, 218, 103, 0.58),
    0 0 30px rgba(255, 218, 103, 0.22);
  transform: translate(-50%, -50%) translate3d(0, 0, 0) rotateY(-38deg) rotateX(4deg);
  transform-origin: 0 50%;
  transform-style: preserve-3d;
  clip-path: polygon(0 0, 100% 8%, 92% 92%, 0 100%);
  transition:
    box-shadow 520ms ease,
    opacity 520ms ease;
  animation: none;
  opacity: 0;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.layer-stack-demo.is-expanded .layer-card {
  opacity: 1;
}

.layer-card:nth-child(1) { z-index: 1; }
.layer-card:nth-child(2) { z-index: 2; }
.layer-card:nth-child(3) { z-index: 3; }
.layer-card:nth-child(4) { z-index: 4; }
.layer-card:nth-child(5) { z-index: 5; }
.layer-card:nth-child(6) { z-index: 6; }
.layer-card:nth-child(7) { z-index: 7; }

.layer-stack-demo.is-expanded .layer-card:hover {
  box-shadow:
    0 22px 44px rgba(28, 39, 32, 0.18),
    0 0 34px rgba(255, 218, 103, 0.26);
}

.layer-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: transparent;
  border-radius: 6px;
  clip-path: inherit;
  filter:
    drop-shadow(0 0 1px rgba(17, 24, 32, 0.52))
    drop-shadow(0 0 4px rgba(255, 218, 103, 0.24));
}

.layer-card figcaption {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .layer-card {
    transition: none;
  }
}

.scenes-section {
  background: var(--surface);
}

.viewer-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: start;
}

.viewer-panel {
  position: static;
  background: #111820;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.viewer-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.65rem;
  background: rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.viewer-toolbar button,
.tabs button,
.scene-pair-controls button,
.copy-bibtex-btn {
  min-height: 38px;
  border-radius: var(--radius);
  border: 1px solid rgba(111, 143, 78, 0.28);
  background: var(--surface);
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
  transition: background var(--transition), color var(--transition), transform var(--transition), border var(--transition);
}

.viewer-toolbar button {
  color: white;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
  min-width: 42px;
  padding: 0.42rem 0.7rem;
}

.viewer-toolbar button.is-active,
.tabs button.is-active {
  background: var(--sun);
  color: var(--ink);
  border-color: var(--sun);
}

.viewer-toolbar button:hover,
.tabs button:hover,
.scene-pair-controls button:hover,
.copy-bibtex-btn:hover {
  transform: translateY(-1px);
}

.splat-viewer-stage {
  position: relative;
  width: 100%;
  height: 640px;
  background: #111820;
  overflow: hidden;
}

#splat-viewer-frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #111820;
}

.splat-viewer-thumb {
  position: absolute;
  top: 0.82rem;
  left: 0.82rem;
  width: min(29%, 188px);
  margin: 0;
  padding: 0.35rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(17, 24, 32, 0.7);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(12px);
  pointer-events: none;
}

.splat-viewer-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: block;
  object-fit: contain;
  background: #0f151c;
  border-radius: 5px;
}

.splat-viewer-thumb figcaption {
  padding-top: 0.28rem;
  color: white;
  font-weight: 800;
  font-size: 0.78rem;
  text-align: center;
}

.viewer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.8rem 0.9rem;
  color: rgba(255, 255, 255, 0.76);
  background: rgba(0, 0, 0, 0.28);
  font-size: 0.9rem;
}

.viewer-meta strong {
  color: white;
}

.viewer-load-note {
  width: min(94%, 760px);
  margin: 1.05rem auto 0;
  padding: 0;
  color: white;
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.16rem, 1.55vw, 1.32rem);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
}

.viewer-load-note strong {
  color: var(--accent);
  font-weight: 900;
}

.scene-pair-panel {
  min-width: 0;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.6);
  box-shadow:
    0 18px 48px rgba(255, 218, 103, 0.16),
    0 0 34px rgba(255, 218, 103, 0.22);
  backdrop-filter: blur(10px);
}

.scene-pair-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.scene-pair-header strong,
.scene-pair-card h3 {
  display: block;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 800;
}

.scene-pair-header strong {
  font-size: 1.42rem;
  line-height: 1.08;
}

.scene-pair-header span,
.scene-pair-card p {
  display: block;
  margin: 0.12rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.scene-pair-controls {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex: 0 0 auto;
}

.scene-pair-controls button {
  width: 38px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  background: var(--ink);
  border-color: var(--ink);
  color: white;
}

.scene-pair-controls span {
  min-width: 86px;
  color: var(--ink);
  text-align: center;
  font-family: "Roboto Mono", monospace;
  font-size: 0.82rem;
  font-weight: 800;
}

.scene-pair-scroll {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
  padding-bottom: 0.35rem;
}

.scene-pair-scroll::-webkit-scrollbar {
  height: 8px;
}

.scene-pair-scroll::-webkit-scrollbar-track {
  background: rgba(255, 218, 103, 0.16);
  border-radius: 999px;
}

.scene-pair-scroll::-webkit-scrollbar-thumb {
  background: rgba(255, 218, 103, 0.52);
  border-radius: 999px;
}

.scene-pair-card {
  flex: 0 0 100%;
  min-width: 0;
  scroll-snap-align: start;
  padding: 0.2rem;
}

.scene-pair-card header {
  margin-bottom: 0.65rem;
}

.scene-pair-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.scene-pair-media {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}

.scene-pair-media figure {
  margin: 0;
  min-width: 0;
}

.scene-pair-media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 8.6;
  max-height: 280px;
  object-fit: contain;
  border-radius: 6px;
  background: white;
}

.scene-pair-media figcaption {
  padding-top: 0.34rem;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 0.98rem;
  line-height: 1.12;
  font-weight: 700;
}

.scene-render-grid {
  margin-top: 1.4rem;
}

.results-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 1rem;
  align-items: stretch;
}

.metric-table-wrap {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid rgba(111, 143, 78, 0.2);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.metric-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.metric-table caption {
  caption-side: top;
  margin-bottom: 0.8rem;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 700;
  text-align: left;
}

.metric-table th,
.metric-table td {
  padding: 0.72rem 0.65rem;
  border-bottom: 1px solid rgba(111, 143, 78, 0.16);
  text-align: left;
}

.metric-table th {
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
}

.highlight-row td {
  background: rgba(255, 218, 104, 0.34);
  color: var(--ink);
  font-weight: 700;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.tabs button {
  padding: 0.48rem 0.82rem;
}

.tab-group[hidden] {
  display: none;
}

.replay-showcase {
  display: grid;
  gap: 1.15rem;
  width: var(--content-frame-width);
  margin-left: auto;
  margin-right: auto;
}

.replay-case {
  padding: 0.85rem;
  border: 1px solid rgba(136, 211, 185, 0.34);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.62);
  box-shadow:
    0 16px 38px rgba(136, 211, 185, 0.18),
    0 0 30px rgba(136, 211, 185, 0.2);
  backdrop-filter: blur(10px);
}

.replay-row + .replay-row {
  margin-top: 0.9rem;
}

.replay-case header {
  margin: 0 0 0.72rem;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 1.22rem;
  font-weight: 800;
  text-align: center;
}

.replay-more-actions {
  display: flex;
  justify-content: center;
  margin: 1.1rem 0 0;
}

.view-more-cases-btn {
  min-height: 42px;
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius);
  border: 1px solid rgba(136, 211, 185, 0.58);
  color: white;
  background: rgba(136, 211, 185, 0.5);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(136, 211, 185, 0.18);
}

.view-more-cases-btn:hover {
  transform: translateY(-1px);
}

.replay-more-cases {
  width: var(--content-frame-width);
  margin-top: 1rem;
  margin-left: auto;
  margin-right: auto;
}

.replay-more-cases[hidden] {
  display: none;
}

#experiment-3 {
  background: var(--surface);
}

#experiment-3 .section-title + .section-lead {
  margin-top: 4.55rem;
}

#experiment-4 .section-lead {
  max-width: 1080px;
}

.data-evidence {
  width: var(--content-frame-width);
  margin: 0 auto 3.2rem;
}

.data-task-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 1rem;
  align-items: stretch;
}

.data-evidence-figure,
.data-results-table {
  margin: 0;
}

.data-evidence-figure {
  display: flex;
  min-width: 0;
  height: 100%;
  flex-direction: column;
}

.data-setting-card {
  padding: 1rem;
  border: 1px solid rgba(111, 143, 78, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
}

.data-evidence-figure img,
.data-results-table img {
  display: block;
  width: 100%;
  object-fit: contain;
  background: white;
}

.data-evidence-figure img {
  flex: 1;
  min-height: 0;
  height: 340px;
  object-position: center bottom;
}

.data-results-table {
  margin-top: 1rem;
}

.data-results-table img {
  max-height: 420px;
}

.data-task-description img {
  height: 340px;
  object-position: center bottom;
}

.task-description-card {
  min-width: 0;
  padding: 1rem 1.05rem;
  border: 1px solid rgba(111, 143, 78, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
}

.task-description-card {
  min-height: 340px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.task-description-card h3 {
  margin: 0 0 0.85rem;
  color: var(--ink);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 1.2rem;
  line-height: 1.12;
  text-align: center;
}

.task-description-list {
  display: grid;
  gap: 0.28rem;
}

.task-description-list.compact {
  gap: 0.24rem;
}

.task-row {
  display: grid;
  grid-template-columns: 2.35rem minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.22;
}

.task-description-list.compact .task-row {
  font-size: 0.88rem;
}

.task-row span {
  color: var(--ink);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-weight: 800;
  text-align: right;
}

.task-row p {
  margin: 0;
}

.task-row.is-long-horizon span,
.task-row.is-long-horizon p {
  color: var(--ink);
  font-weight: 800;
}

.task-note {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.16rem, 1.55vw, 1.32rem);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
}

.data-evidence-figure figcaption {
  margin-top: 0.5rem;
  flex: 0 0 auto;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 1.16rem;
  font-weight: 700;
  line-height: 1.15;
  text-align: center;
}

.data-task-description p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
}

.data-results-composite {
  position: relative;
  margin-top: 3.4rem;
  padding: 0.45rem 0 1.55rem;
  border: 0;
  border-radius: 0;
  background: white;
  box-shadow: none;
  overflow: hidden;
}

.data-table-watermark {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  bottom: 3.25rem;
  left: 0.85rem;
  width: calc(100% - 1.7rem);
  height: auto;
  object-fit: contain;
  opacity: 0.1;
  filter: grayscale(1);
  pointer-events: none;
}

.data-results-foreground {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.data-ratio-figure {
  width: min(620px, 86%);
  margin: 5.4rem 0 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.data-ratio-figure img {
  display: block;
  width: 100%;
  max-height: 390px;
  object-fit: contain;
  background: transparent;
}

.data-ratio-figure figcaption {
  margin: 1rem auto 0;
  padding: 0;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.18rem, 1.6vw, 1.38rem);
  font-weight: 700;
  line-height: 1.15;
  text-align: center;
}

.data-before-after-grid {
  width: var(--content-frame-width);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 3.2rem auto 1rem;
}

.data-before-after-item {
  margin: 0;
  min-width: 0;
}

.data-before-after-item h3 {
  margin: 0 0 0.42rem;
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: clamp(1.28rem, 1.9vw, 1.55rem);
  line-height: 1.18;
  font-weight: 800;
}

.data-before-after-item h3 span:not(.robosnap-shadow-text) {
  display: block;
  margin: 0.16rem 0 0;
  color: inherit;
  font-size: clamp(1.08rem, 1.5vw, 1.28rem);
  font-weight: 700;
}

.data-before-after-item.is-failure h3 {
  color: var(--danger);
}

.data-before-after-item.is-success h3 {
  color: var(--success);
}

.data-before-after-item video {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.data-before-after-item figcaption {
  margin-top: 0.42rem;
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.12rem, 1.45vw, 1.28rem);
  font-weight: 700;
  line-height: 1.16;
}

.data-aug-slider {
  width: var(--content-frame-width);
  margin: 1rem auto 0;
}

.data-aug-controls {
  justify-content: flex-end;
  margin-bottom: 0.7rem;
}

.data-aug-track {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
  padding-bottom: 0.35rem;
}

.data-aug-track::-webkit-scrollbar {
  height: 8px;
}

.data-aug-track::-webkit-scrollbar-track {
  background: rgba(136, 211, 185, 0.12);
  border-radius: 999px;
}

.data-aug-track::-webkit-scrollbar-thumb {
  background: rgba(136, 211, 185, 0.5);
  border-radius: 999px;
}

.data-aug-slide {
  flex: 0 0 100%;
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  scroll-snap-align: start;
}

.data-aug-pair {
  min-width: 0;
}

.data-aug-pair h4 {
  margin: 0 0 0.45rem;
  color: var(--ink);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 1.1rem;
  line-height: 1.12;
  font-weight: 800;
  text-align: center;
}

.data-aug-videos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.data-aug-videos figure {
  min-width: 0;
  margin: 0;
}

.data-aug-videos video {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.data-aug-videos figcaption {
  margin-top: 0.32rem;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 0.98rem;
  line-height: 1.12;
  font-weight: 700;
  text-align: center;
}

.robust-evidence-layout {
  width: var(--content-frame-width);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 0.9rem;
  align-items: stretch;
  margin: 0 auto;
}

.robust-summary-figure {
  min-width: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.robust-summary-figure img {
  display: block;
  width: 100%;
  max-height: 540px;
  object-fit: contain;
}

.robust-summary-figure figcaption {
  margin-top: 0.42rem;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.18rem, 1.6vw, 1.38rem);
  line-height: 1.18;
  font-weight: 700;
  text-align: center;
}

.robust-rollout-slider {
  min-width: 0;
  width: 100%;
  margin: 0;
  padding: 0.95rem;
  border: 1px solid rgba(136, 211, 185, 0.35);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 50px rgba(136, 211, 185, 0.28);
}

.robust-rollout-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.65rem;
  margin-bottom: 0.7rem;
}

.robust-rollout-header h3 {
  min-width: 0;
  margin: 0;
  color: var(--ink);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.02rem, 1.48vw, 1.24rem);
  line-height: 1.12;
  font-weight: 800;
}

.robust-speed-note {
  width: fit-content;
  margin: 0.26rem auto 0;
  padding: 0.22rem 0.54rem;
  border-radius: 999px;
  background: rgba(136, 211, 185, 0.5);
  color: white;
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.sim-real-slider {
  width: var(--content-frame-width);
  margin: 0 auto;
}

.sim-real-diagnostic-figure {
  width: min(50%, 640px);
  margin: 5rem auto 0;
  padding: 0;
  background: transparent;
}

.sim-real-diagnostic-figure img {
  display: block;
  width: 100%;
  max-height: 780px;
  object-fit: contain;
}

.sim-real-diagnostic-figure figcaption {
  margin-top: 0.85rem;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.12rem, 1.65vw, 1.32rem);
  line-height: 1.22;
  font-weight: 700;
  text-align: center;
}

.sim-real-heading {
  margin-top: 5.2rem;
  margin-bottom: 2rem;
}

.sim-real-controls {
  justify-content: flex-end;
  margin-bottom: 0.8rem;
}

.sim-real-track {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
  padding-bottom: 0.35rem;
}

.sim-real-track::-webkit-scrollbar {
  height: 8px;
}

.sim-real-track::-webkit-scrollbar-track {
  background: rgba(136, 211, 185, 0.12);
  border-radius: 999px;
}

.sim-real-track::-webkit-scrollbar-thumb {
  background: rgba(136, 211, 185, 0.52);
  border-radius: 999px;
}

.sim-real-slide {
  flex: 0 0 100%;
  min-width: 0;
  scroll-snap-align: start;
}

.sim-real-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.sim-real-pair figure {
  min-width: 0;
  margin: 0;
}

.sim-real-pair video,
.sim-real-pair img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.sim-real-pair figcaption {
  margin-top: 0.34rem;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: 0.98rem;
  line-height: 1.12;
  font-weight: 700;
  text-align: center;
}

.robust-rollout-controls {
  flex: 0 0 auto;
  margin: 0;
}

.robust-rollout-track {
  display: flex;
  gap: 0.7rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
  padding-bottom: 0.35rem;
}

.robust-rollout-track::-webkit-scrollbar {
  height: 8px;
}

.robust-rollout-track::-webkit-scrollbar-track {
  background: rgba(136, 211, 185, 0.12);
  border-radius: 999px;
}

.robust-rollout-track::-webkit-scrollbar-thumb {
  background: rgba(136, 211, 185, 0.52);
  border-radius: 999px;
}

.robust-rollout-slide {
  flex: 0 0 100%;
  min-width: 0;
  display: grid;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 0.42rem;
  scroll-snap-align: start;
}

.robust-rollout-pair {
  min-width: 0;
}

.robust-rollout-pair h4 {
  margin: 0 0 0.34rem;
  color: var(--accent-strong);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.12rem, 1.55vw, 1.32rem);
  line-height: 1.1;
  font-weight: 800;
  text-align: center;
}

.robust-rollout-videos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.44rem;
}

.robust-rollout-videos figure {
  min-width: 0;
  margin: 0;
}

.robust-rollout-videos video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #111820;
  border-radius: 6px;
}

.robust-rollout-videos figcaption {
  margin-top: 0.28rem;
  color: var(--muted);
  font-family: "RoboSnap Serif", Georgia, serif;
  font-size: clamp(1.02rem, 1.35vw, 1.16rem);
  line-height: 1.14;
  font-weight: 700;
  text-align: center;
}

.sim-real-speed-note {
  width: fit-content;
  margin: 0.5rem auto 0;
  padding: 0.22rem 0.54rem;
  border-radius: 999px;
  background: rgba(136, 211, 185, 0.5);
  color: white;
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.callout-grid,
.stat-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 auto 1rem;
}

.callout {
  background: var(--blush);
}

.callout.positive {
  background: #f1f8ec;
  border-color: rgba(111, 143, 78, 0.34);
}

.callout strong {
  display: block;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: 1.1rem;
}

.perturbation-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.perturbation-grid figure {
  background: var(--surface);
  border: 1px solid rgba(111, 143, 78, 0.18);
  border-radius: var(--radius);
  padding: 0.55rem;
  box-shadow: var(--shadow-sm);
}

.perturbation-grid video {
  width: 100%;
  aspect-ratio: 9 / 12;
  object-fit: cover;
  background: #111820;
  border-radius: 6px;
}

.stat-band {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 1rem;
}

.stat-band div {
  background: var(--surface-warm);
}

.resources-section {
  background: var(--surface-blue);
  padding-top: 13.5rem;
}

.thanks-message {
  margin: 0;
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
  font-size: clamp(1.65rem, 3.2vw, 2.4rem);
  font-weight: 800;
  line-height: 1.18;
  text-align: center;
}

.visitor-map {
  display: flex;
  justify-content: center;
  width: min(100%, 320px);
  margin: 24rem auto 0;
}

.visitor-map iframe,
.visitor-map img {
  width: 100% !important;
  max-width: 320px !important;
  height: auto;
}

.section.scenes-section,
.section.replay-section,
.section#experiment-3,
.section#experiment-4,
.section#experiment-5,
.section.resources-section,
.section#BibTeX {
  background: var(--surface);
}

.resource-list {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.35rem;
}

.resource-list a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid rgba(111, 143, 78, 0.2);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.resource-list a:hover {
  text-decoration: none;
  border-color: rgba(111, 143, 78, 0.46);
}

.resource-list strong {
  color: var(--ink);
  font-family: "Google Sans", "Noto Sans", Arial, sans-serif;
}

.resource-list span {
  color: var(--muted);
  text-align: right;
}

.bibtex-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.copy-bibtex-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.45rem 0.75rem;
  background: var(--olive);
  color: white;
  border-color: var(--olive);
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 1rem;
  color: #d9e8ef;
  background: #111820;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.footer {
  padding: 2.5rem 0;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer p {
  margin: 0.35rem 0;
}

.footer a {
  color: var(--olive);
}

@media (max-width: 1240px) {
  .progress-sidebar {
    display: none;
  }
}

@media (max-width: 1024px) {
  .hero {
    min-height: 76vh;
    padding: 6rem 0 3.5rem;
  }

  .hero h1 {
    font-size: 4.7rem;
  }

  .hero-paper-title {
    font-size: 1.85rem;
  }

  .hero-metrics,
  .method-grid,
  .method-refinement-videos,
  .media-grid.three,
  .perturbation-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .viewer-layout,
  .results-layout {
    grid-template-columns: 1fr;
  }

  .viewer-panel {
    position: static;
  }

  .splat-viewer-stage {
    height: 470px;
  }
}

@media (max-width: 760px) {
  .container,
  .container.narrow,
  .hero-inner {
    width: min(100% - 28px, 1180px);
  }

  .section {
    padding: 3.2rem 0;
  }

  .hero {
    min-height: 82vh;
    padding: 5rem 0 3rem;
  }

  .hero-overlay {
    background:
      linear-gradient(0deg, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0.84) 64%, rgba(255, 255, 255, 0.44) 100%),
      linear-gradient(0deg, rgba(255, 248, 223, 0.58) 0%, rgba(208, 226, 243, 0.16) 100%);
  }

  .hero h1 {
    font-size: 3.1rem;
    line-height: 1.1;
  }

  .hero-paper-title {
    font-size: 1.32rem;
    line-height: 1.22;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .teaser-serif-title {
    font-size: 1.45rem;
  }

  .wide-video {
    width: 100%;
  }

  .hero-actions,
  .authors,
  .bibtex-header,
  .resource-list a {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .copy-bibtex-btn {
    width: 100%;
  }

  .hero-metrics,
  .method-grid,
  .method-support-grid,
  .method-refinement-videos,
  .data-task-grid,
  .robust-evidence-layout,
  .data-before-after-grid,
  .data-aug-slide,
  .robust-rollout-videos,
  .sim-real-pair,
  .media-grid.two,
  .media-grid.three,
  .callout-grid,
  .stat-band,
  .perturbation-grid {
    grid-template-columns: 1fr;
  }

  .abstract-teaser-figure {
    width: 100%;
  }

  .sim-real-diagnostic-figure {
    width: 100%;
  }

  .task-description-card {
    min-height: 0;
  }

  .data-table-watermark {
    opacity: 0.1;
  }

  .robust-rollout-slider {
    width: 100%;
    padding: 0.8rem;
  }

  .robust-rollout-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .layer-stack-demo {
    width: 100%;
    padding: 0.85rem;
  }

  .layer-stack-stage {
    height: 300px;
  }

  .layer-card {
    width: min(48%, 190px);
    padding: 0.42rem;
  }

  .layer-card figcaption {
    font-size: 0.82rem;
  }

  .scene-pair-media {
    grid-template-columns: 1fr;
  }

  .scene-pair-media img {
    height: auto;
    aspect-ratio: 16 / 10;
  }

  .scene-pair-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .splat-viewer-stage {
    height: 370px;
  }

  .splat-viewer-thumb {
    width: min(42%, 160px);
  }

  .resource-list span {
    text-align: left;
  }

}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.55rem;
  }

  .hero-paper-title {
    font-size: 1.08rem;
  }

  .hero-metrics strong,
  .stat-band strong {
    font-size: 1.25rem;
  }

  .viewer-toolbar,
  .tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

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