:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --text: #161616;
  --muted: #5f6368;
  --line: #e4e6ea;
  --accent: #d85f28;
  --accent-deep: #a8421d;
  --accent-soft: #fff1e8;
  --max: 900px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: Aptos, "Aptos Display", "Aptos Text", "Segoe UI", Arial, sans-serif;
  line-height: 1.58;
  background:
    linear-gradient(180deg, rgba(216, 95, 40, 0.08), rgba(216, 95, 40, 0) 250px),
    var(--bg);
  overflow-x: hidden;
}

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

.site-menu {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 30;
}

.site-menu__button {
  display: inline-flex;
  width: 2.65rem;
  height: 2.65rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(20, 25, 35, 0.08);
  backdrop-filter: blur(14px);
}

.site-menu__button span {
  display: block;
  width: 1rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.site-menu__panel {
  position: absolute;
  top: calc(100% + 0.55rem);
  left: 0;
  display: grid;
  min-width: 13rem;
  padding: 0.4rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 16px 38px rgba(20, 25, 35, 0.12);
  backdrop-filter: blur(14px);
}

.site-menu__panel[hidden] {
  display: none;
}

.site-menu__panel a {
  padding: 0.58rem 0.72rem;
  border-radius: 6px;
  color: #3f4349;
  font-size: 0.92rem;
  font-weight: 750;
}

.site-menu__panel a:hover {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.hero {
  width: min(1080px, calc(100% - 36px));
  margin: 0 auto;
  padding: 74px 0 42px;
  text-align: center;
}

h1 {
  max-width: 1040px;
  margin: 0 auto;
  font-size: 2.5rem;
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 800;
  overflow-wrap: break-word;
  text-wrap: normal;
}

.title-accent {
  color: var(--accent);
}

.title-word {
  margin-bottom: 0.03em;
  font-size: 1.28em;
  line-height: 1;
}

.title-word,
.title-line {
  display: block;
}

.title-line {
  font-weight: 650;
}

.title-line--system {
  font-size: 0.89em;
}

.title-line--context {
  font-size: 1.12em;
}

.authors {
  margin: 28px auto 0;
}

.authors sup {
  font-size: 0.68em;
  line-height: 0;
}

.authors__names {
  margin: 0;
  color: var(--text);
  font-size: 1.14rem;
  font-weight: 650;
  line-height: 1.7;
}

.authors__names span {
  display: block;
}

.authors__affiliation {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  font-weight: 600;
}

.authors__affiliation-logo {
  display: block;
  height: 1.3rem;
  width: auto;
  margin: 0 auto;
}

.authors__notes {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.authors__notes span + span {
  margin-left: 1.1rem;
}

.authors__venue {
  margin: 0.9rem 0 0;
  color: var(--accent);
  font-size: 1.12rem;
  font-weight: 800;
}

.abstract {
  position: relative;
  width: 100%;
  margin: 22px auto 0;
  padding: 2.5rem 18px 2.2rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  box-shadow: none;
  overflow: hidden;
}

.abstract h2 {
  max-width: var(--max);
  margin: 0 auto 0.35rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.2;
  letter-spacing: 0.11em;
  font-weight: 900;
  text-transform: uppercase;
}

.abstract p {
  max-width: var(--max);
  margin: 0.45rem auto 0;
  color: var(--text);
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.72;
  text-align: justify;
  text-align-last: left;
}

.abstract p + p {
  margin-top: 1rem;
}

.abstract .abstract__title--strong {
  margin-bottom: 0.7rem;
  color: var(--text);
  font-size: clamp(1.45rem, 2.2vw, 1.9rem);
  font-weight: 750;
  letter-spacing: 0;
  text-transform: none;
}

.abstract + .abstract {
  margin-top: 0;
  border-top: 0;
}

.bibtex {
  max-width: var(--max);
  margin: 0.45rem auto 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef0f2;
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.6;
}

.policy-note {
  padding: 4.4rem 18px 1.2rem;
  background: var(--bg);
}

.policy-note__text {
  max-width: 1180px;
  margin: 0 auto;
  color: var(--text);
  font-size: clamp(1.35rem, 2.25vw, 2.05rem);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 0;
  text-align: center;
  white-space: nowrap;
}

.sim-real {
  padding: 2.9rem 18px 4rem;
  background: var(--bg);
}

.sim-real__inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.sim-real__title {
  max-width: 100%;
  margin: 0;
  color: var(--text);
  font-size: clamp(1.65rem, 2.8vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 600;
}

.sim-real__title-muted {
  color: var(--text);
  font-weight: 560;
}

.sim-real__title-strong {
  color: var(--text);
  font-weight: 680;
}

.sim-real__body {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(1.35rem, 3vw, 3.2rem);
  align-items: center;
  margin-top: 2rem;
}

.sim-real__copy {
  max-width: 430px;
}

.sim-real__lead,
.sim-real__summary {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.08rem, 1.45vw, 1.24rem);
  font-weight: 560;
  line-height: 1.55;
}

.sim-real__summary {
  margin-top: 1.15rem;
  color: var(--muted);
  font-weight: 560;
}

.dof-list {
  display: grid;
  gap: 0;
  margin: 1.05rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.dof-list li {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.72rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: clamp(1.02rem, 1.18vw, 1.12rem);
  font-weight: 560;
  line-height: 1.25;
}

.dof-list strong {
  flex: 0 0 auto;
  color: var(--text);
  font-size: clamp(0.98rem, 1.1vw, 1.05rem);
  font-weight: 560;
}

.sim-real__eval-link {
  display: flex;
  width: fit-content;
  align-items: center;
  justify-content: center;
  margin: 1.45rem auto 0;
  padding: 0.86rem 1.18rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--surface);
  color: var(--accent);
  font-size: 0.96rem;
  font-weight: 780;
  line-height: 1;
  text-align: center;
  box-shadow: 0 8px 16px rgba(216, 95, 40, 0.1);
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.sim-real__eval-link:hover,
.sim-real__eval-link:focus-visible {
  border-color: var(--accent-deep);
  background: var(--accent-soft);
  color: var(--accent-deep);
  box-shadow: 0 10px 20px rgba(216, 95, 40, 0.14);
  outline: none;
  transform: translateY(-1px);
}

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

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.72rem;
}

.showcase-card {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.video-expand-frame {
  position: relative;
}

.showcase-media {
  aspect-ratio: 16 / 9;
  background: #f3f4f1;
}

.showcase-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.showcase-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.62rem;
  margin-top: 0.88rem;
}

.showcase-button {
  display: inline-flex;
  width: 2.35rem;
  height: 2.35rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(20, 25, 35, 0.08);
}

.showcase-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.showcase-button:disabled {
  color: rgba(22, 22, 22, 0.48);
  cursor: default;
}

.showcase-status {
  min-width: 3.6rem;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 850;
  line-height: 1;
  text-align: center;
}

.contextual {
  padding: 1.45rem 18px 4rem;
  background: var(--bg);
}

.contextual__inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.contextual__title {
  max-width: 100%;
  margin: 0;
  color: var(--text);
  font-size: clamp(1.65rem, 2.8vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 600;
  text-align: left;
}

.contextual__body {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(1.35rem, 3vw, 3.2rem);
  align-items: center;
  margin: 2rem auto 0;
  color: var(--text);
  text-align: left;
}

.contextual__copy {
  max-width: 430px;
  font-size: clamp(1.08rem, 1.45vw, 1.24rem);
  font-weight: 560;
  line-height: 1.55;
}

.contextual__copy p {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.08rem, 1.45vw, 1.24rem);
  font-weight: 560;
  line-height: 1.55;
}

.contextual__copy p + p {
  margin-top: 1rem;
}

.contextual__copy p:last-child {
  margin-top: 1.15rem;
  color: var(--muted);
  font-weight: 560;
}

.contextual__copy ul {
  display: grid;
  gap: 0;
  margin: 1.05rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.contextual__copy li {
  position: relative;
  margin: 0;
  padding: 0.72rem 0 0.72rem 1.05rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: clamp(1.02rem, 1.18vw, 1.12rem);
  font-weight: 560;
  line-height: 1.35;
}

.contextual__copy li::before {
  position: absolute;
  top: 1.16rem;
  left: 0;
  width: 0.34rem;
  height: 0.34rem;
  border-radius: 999px;
  background: var(--accent);
  content: "";
}

.contextual__copy li::marker {
  color: var(--accent);
}

.contextual__visuals {
  display: grid;
  min-width: 0;
  gap: 1.12rem;
}

.contextual-comparison {
  display: grid;
  gap: 0.58rem;
}

.contextual-comparison__title {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.08rem, 1.45vw, 1.24rem);
  font-weight: 780;
  line-height: 1.28;
  letter-spacing: 0;
  text-align: center;
}

.contextual-comparison__caption {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.86rem, 1vw, 0.95rem);
  font-weight: 720;
  line-height: 1.28;
  text-align: center;
}

.contextual-video-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.68rem;
}

.contextual-demo-video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f3f4f1;
  box-shadow: none;
  object-fit: cover;
}

.whole-body {
  padding: 3.2rem 18px 4rem;
  background: var(--bg);
}

.whole-body__inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.whole-body__title {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.65rem, 2.8vw, 2.55rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: 0;
  text-align: left;
}


.whole-body__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.4vw, 1.7rem);
  margin-top: 2rem;
}

.whole-body-demo {
  min-width: 0;
  margin: 0;
}

.whole-body-demo__title {
  margin: 0 0 0.62rem;
  color: var(--text);
  font-size: clamp(1.08rem, 1.45vw, 1.24rem);
  font-weight: 780;
  line-height: 1.28;
  letter-spacing: 0;
  text-align: center;
}

.whole-body__description {
  margin: 2rem 0 0.62rem;
}

.whole-body__description + .whole-body__grid {
  margin-top: 0;
}

.whole-body-demo__media {
  display: grid;
  width: 100%;
  aspect-ratio: 16 / 9;
  place-items: center;
  border: 1px dashed #cfd3d8;
  border-radius: 8px;
  background: #f3f4f1;
  color: var(--muted);
  font-size: clamp(0.92rem, 1.2vw, 1.05rem);
  font-weight: 650;
}

.whole-body-demo__video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f3f4f1;
  object-fit: cover;
}

.whole-body-demo__caption {
  margin-top: 0.66rem;
  color: var(--muted);
  font-size: clamp(0.92rem, 1.12vw, 1.02rem);
  font-weight: 560;
  line-height: 1.38;
  text-align: center;
}

.evals {
  padding: 3.4rem 18px 4rem;
  background: var(--bg);
}

.evals-header {
  width: min(1180px, 100%);
  margin: 0 auto 1.55rem;
  text-align: left;
}

.evals-header h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.65rem, 2.8vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 600;
}

.evals-header__meta {
  margin-top: 0.72rem;
}

.evals-subtitle {
  max-width: 1180px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.45vw, 1.24rem);
  font-weight: 560;
  line-height: 1.42;
}

.text-accent {
  color: var(--accent);
}

.text-nowrap {
  white-space: nowrap;
}

.eval-play-hint {
  margin: 0.86rem auto 0;
  color: var(--accent);
  font-size: clamp(0.92rem, 1vw, 0.98rem);
  font-weight: 780;
  line-height: 1.2;
  text-align: center;
}

.eval-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.eval-card {
  contain: layout paint;
  content-visibility: auto;
  contain-intrinsic-size: 210px;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.eval-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(216, 95, 40, 0.12), rgba(216, 95, 40, 0) 48%),
    #f3f4f1;
}

.eval-media video {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 180ms ease;
}

.eval-card.has-video .eval-media {
  cursor: pointer;
}

.framework {
  padding: 3.8rem 18px 4.3rem;
  background: var(--bg);
}

.framework__inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.framework__title {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.65rem, 2.8vw, 2.55rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: 0;
}

.framework-component {
  margin-top: 2.35rem;
}

.framework-component--pending {
  margin-top: 2.8rem;
}

.framework-component__title {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.35rem, 2vw, 1.78rem);
  font-weight: 720;
  line-height: 1.25;
  letter-spacing: 0;
}

.framework-component__description {
  width: 100%;
  max-width: 100%;
  margin: 0.68rem 0 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.24vw, 1.12rem);
  font-weight: 560;
  line-height: 1.5;
  text-align: justify;
  text-align-last: left;
}

.framework-video-grid {
  display: grid;
  gap: clamp(0.88rem, 1.8vw, 1.2rem);
  margin-top: 1.2rem;
}

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

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

.framework-video-card {
  min-width: 0;
  margin: 0;
}

.framework-video-card__title {
  margin: 0 0 0.58rem;
  color: var(--text);
  font-size: clamp(0.98rem, 1.2vw, 1.08rem);
  font-weight: 760;
  line-height: 1.28;
  letter-spacing: 0;
  text-align: center;
}

.framework-video-card__title:last-child {
  margin: 0.58rem 0 0;
}

.framework-video-card__placeholder {
  display: grid;
  width: 100%;
  aspect-ratio: 16 / 9;
  place-items: center;
  border: 1px dashed #cfd3d8;
  border-radius: 8px;
  background: #f3f4f1;
  color: var(--muted);
  font-size: clamp(0.9rem, 1.05vw, 0.98rem);
  font-weight: 650;
}

.framework-video-card__video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f3f4f1;
  object-fit: cover;
}

.framework-component__figure {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f3f4f1;
}

.framework-component__figure--narrow {
  width: min(80%, 940px);
  margin-right: auto;
  margin-left: auto;
}

.distillation-carousel {
  margin-top: 1.35rem;
}

.distillation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.74rem, 1.45vw, 1rem);
}

.distillation-card {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.distillation-video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #f3f4f1;
  object-fit: cover;
}

.distillation-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.62rem;
  margin-top: 0.95rem;
}

.distillation-button {
  display: inline-flex;
  width: 2.35rem;
  height: 2.35rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(20, 25, 35, 0.08);
}

.distillation-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.distillation-button:disabled {
  color: rgba(22, 22, 22, 0.48);
  cursor: default;
}

.distillation-status {
  min-width: 3.6rem;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 850;
  line-height: 1;
  text-align: center;
}

.eval-expand-button,
.video-expand-button,
.eval-lightbox__close {
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(20, 25, 35, 0.18);
  transition:
    opacity 160ms ease,
    transform 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    background 160ms ease;
}

.eval-expand-button svg,
.video-expand-button svg,
.eval-lightbox__close svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.eval-expand-button,
.video-expand-button {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  z-index: 4;
  width: 2rem;
  height: 2rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-0.22rem);
}

.eval-expand-button:hover,
.eval-expand-button:focus-visible,
.video-expand-button:hover,
.video-expand-button:focus-visible,
.eval-lightbox__close:hover,
.eval-lightbox__close:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.eval-card.has-video:hover .eval-expand-button,
.eval-card.has-video:focus-within .eval-expand-button,
.distillation-card:hover .video-expand-button,
.distillation-card:focus-within .video-expand-button,
.showcase-card:hover .video-expand-button,
.showcase-card:focus-within .video-expand-button,
.video-expand-frame:hover .video-expand-button,
.video-expand-frame:focus-within .video-expand-button {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.eval-change-button {
  position: absolute;
  top: 0.55rem;
  left: 0.55rem;
  z-index: 4;
  max-width: calc(100% - 1.1rem);
  padding: 0.42rem 0.58rem;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font: inherit;
  font-size: 0.76rem;
  font-weight: 850;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 8px 18px rgba(20, 25, 35, 0.18);
  transform: translateY(0.28rem);
  transition:
    opacity 160ms ease,
    transform 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.eval-change-button:hover,
.eval-change-button:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.eval-card.has-multiple-videos:hover .eval-change-button,
.eval-card.has-multiple-videos:focus-within .eval-change-button {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.eval-card.is-switching video {
  opacity: 0;
}

.eval-card.is-switching .eval-media::after {
  content: "...";
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  background: rgba(243, 244, 241, 0.82);
}

.eval-card.is-switching .eval-change-button {
  opacity: 0;
  pointer-events: none;
}

.eval-card.is-switching .eval-expand-button {
  opacity: 0;
  pointer-events: none;
}

.eval-card.has-video video {
  opacity: 1;
}

.eval-card.has-video.is-switching video {
  opacity: 0;
}

.eval-card.has-video .eval-placeholder {
  opacity: 0;
}

.eval-card.is-loaded video {
  opacity: 1;
}

.eval-card.is-loaded .eval-placeholder {
  opacity: 0;
}

.eval-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: opacity 180ms ease;
}

.eval-caption {
  margin: 0;
  padding: 0.48rem 0.58rem 0.56rem;
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
}

.has-eval-lightbox {
  overflow: hidden;
}

.eval-lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 5vh 4vw;
  background: rgba(14, 16, 20, 0.72);
}

.eval-lightbox[hidden] {
  display: none;
}

.eval-lightbox__frame {
  position: relative;
  width: min(1180px, 94vw);
  max-height: 88vh;
  aspect-ratio: 16 / 9;
  background: #111318;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

.eval-lightbox__video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #111318;
  transition: opacity 160ms ease;
}

.eval-lightbox.is-loading .eval-lightbox__video {
  opacity: 0.36;
}

.eval-lightbox.is-loading .eval-lightbox__frame::after {
  content: "...";
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  background: rgba(17, 19, 24, 0.62);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.eval-lightbox__close {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  z-index: 2;
  width: 2.35rem;
  height: 2.35rem;
}

.eval-lightbox__change {
  position: absolute;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 2;
  max-width: calc(100% - 5.6rem);
  padding: 0.5rem 0.68rem;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 850;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(20, 25, 35, 0.18);
  transition:
    border-color 160ms ease,
    color 160ms ease,
    background 160ms ease;
}

.eval-lightbox__change:hover,
.eval-lightbox__change:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

@media (hover: none) {
  .eval-expand-button,
  .eval-change-button {
    display: none;
  }

  .video-expand-button {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .sim-real__body {
    grid-template-columns: 1fr;
  }

  .sim-real__copy {
    max-width: 680px;
  }

  .contextual__body {
    grid-template-columns: 1fr;
  }

  .contextual__copy {
    max-width: 720px;
  }

  .whole-body__grid {
    grid-template-columns: 1fr;
  }

  .framework-video-grid--three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .hero {
    width: min(calc(100% - 28px), var(--max));
    padding: 48px 0 30px;
  }

  h1 {
    font-size: 2.05rem;
    line-height: 1.18;
  }

  .title-line {
    display: inline;
    font-size: 0.92em;
    font-weight: 650;
  }

  .title-line--system::after {
    content: " ";
  }

  .authors {
    margin-top: 22px;
  }

  .authors__names {
    font-size: 1rem;
  }

  .abstract {
    margin-top: 14px;
    padding: 2.2rem 18px 2rem;
  }

  .abstract p {
    font-size: 1rem;
  }

  .policy-note {
    padding: 3.3rem 18px 1rem;
  }

  .policy-note__text {
    font-size: clamp(1.35rem, 6vw, 1.9rem);
    white-space: normal;
  }

  .sim-real {
    padding: 2.35rem 18px 3.2rem;
  }

  .sim-real__title {
    font-size: clamp(1.45rem, 6vw, 2.05rem);
  }

  .sim-real__body {
    margin-top: 1.45rem;
  }

  .contextual {
    padding: 1.45rem 18px 3.2rem;
  }

  .contextual__title {
    font-size: clamp(1.45rem, 6vw, 2.05rem);
  }

  .contextual__body {
    margin-top: 1.35rem;
  }

  .whole-body {
    padding: 2.6rem 18px 3.2rem;
  }

  .whole-body__title {
    font-size: clamp(1.45rem, 6vw, 2.05rem);
  }

  .evals-header h2 {
    font-size: clamp(1.45rem, 6vw, 2.05rem);
  }

  .framework {
    padding: 3rem 18px 3.4rem;
  }

  .framework__title {
    font-size: clamp(1.45rem, 6vw, 2.05rem);
  }

  .framework-video-grid--two,
  .framework-video-grid--three {
    grid-template-columns: 1fr;
  }

  .framework-component__figure--narrow {
    width: 100%;
  }

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

  .whole-body__grid {
    margin-top: 1.45rem;
  }

  .whole-body__description {
    margin-top: 1.45rem;
  }

  .showcase-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.62rem;
  }

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

  .evals-header__meta {
    display: block;
  }

  .eval-play-hint {
    margin-top: 0.72rem;
    text-align: center;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 1.48rem;
  }

  .abstract {
    padding: 2rem 16px 1.85rem;
  }

  .evals {
    padding-right: 14px;
    padding-left: 14px;
  }

  .sim-real {
    padding-right: 14px;
    padding-left: 14px;
  }

  .policy-note {
    padding-right: 14px;
    padding-left: 14px;
  }

  .contextual {
    padding-right: 14px;
    padding-left: 14px;
  }

  .whole-body {
    padding-right: 14px;
    padding-left: 14px;
  }

  .framework {
    padding-right: 14px;
    padding-left: 14px;
  }

  .contextual-video-pair {
    gap: 0.44rem;
  }

  .contextual-comparison__title {
    font-size: 0.92rem;
  }

  .dof-list li {
    gap: 0.75rem;
    font-size: 0.9rem;
  }

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

  .eval-caption {
    font-size: 0.78rem;
  }

  .distillation-grid {
    gap: 0.5rem;
  }
}