:root {
  --navy: #315d86;
  --navy-deep: #183a5b;
  --teal: #118981;
  --teal-soft: #e4f3f1;
  --salmon: #df956f;
  --ink: #172433;
  --muted: #5d6a78;
  --line: #dce4ea;
  --soft: #f5f8fa;
  --surface: #ffffff;
  --shadow: 0 18px 46px rgb(24 58 91 / 10%);
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--surface);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

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

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

a {
  color: var(--navy);
}

.skip-link {
  background: var(--navy-deep);
  color: #fff;
  left: 1rem;
  padding: 0.65rem 1rem;
  position: fixed;
  top: -5rem;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.landing-splash {
  align-items: center;
  background: #07131f;
  display: flex;
  height: clamp(560px, 45vw, 860px);
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.landing-splash::before {
  background: url("../images/poster-rollout-montage.webp") center / cover no-repeat;
  content: "";
  filter: blur(18px);
  inset: -2rem;
  opacity: 0.7;
  position: absolute;
  transform: scale(1.04);
}

.landing-splash-video {
  height: 100%;
  inset: 0;
  object-fit: cover;
  pointer-events: none;
  position: absolute;
  user-select: none;
  width: 100%;
  z-index: 1;
}

.landing-splash-mask {
  background:
    linear-gradient(180deg, rgb(6 17 29 / 40%), rgb(6 17 29 / 66%)),
    radial-gradient(circle at center, transparent 15%, rgb(4 13 23 / 24%) 78%);
  inset: 0;
  position: absolute;
  z-index: 2;
}

.landing-splash-content {
  align-items: center;
  color: #fff;
  display: grid;
  gap: clamp(2rem, 5vw, 5rem);
  grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
  margin: 0 auto;
  max-width: 88rem;
  padding: 2rem 3rem;
  position: relative;
  text-align: center;
  text-shadow: 0 4px 24px rgb(0 0 0 / 55%);
  width: 100%;
  z-index: 3;
}

.splash-name {
  font-size: clamp(4rem, 8.5vw, 8.75rem);
  font-weight: 850;
  letter-spacing: -0.065em;
  line-height: 0.92;
}

.splash-description {
  font-size: clamp(0.9rem, 1.35vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 1.2rem auto 0;
  max-width: 30rem;
  text-transform: uppercase;
}

.splash-brand-duomind .splash-description {
  color: #72e3d7;
}

.splash-brand-robopoly .splash-description {
  color: #ffc09f;
}

.splash-divider {
  background: rgb(255 255 255 / 54%);
  height: clamp(8rem, 15vw, 13rem);
  width: 1px;
}

.project-hero {
  background:
    radial-gradient(circle at 10% 0%, rgb(17 137 129 / 13%), transparent 35rem),
    radial-gradient(circle at 95% 12%, rgb(49 93 134 / 11%), transparent 32rem),
    #fbfdfe;
}

.project-hero .hero-body {
  padding: 2.75rem 1.5rem 1.5rem;
}

.hero-heading {
  margin: 0 auto;
  max-width: 80rem;
}

.section-kicker {
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.publication-title {
  color: var(--ink);
  font-size: clamp(2.35rem, 4.2vw, 4rem);
  letter-spacing: -0.045em;
  line-height: 1.02;
  margin: 0 auto 1.75rem !important;
}

.title-brand {
  color: var(--navy);
  white-space: nowrap;
}

.publication-byline {
  margin-bottom: 4rem;
}

.publication-authors {
  color: #000;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.author-row,
.publication-affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1.25rem;
}

.author-row {
  gap: 0.1rem 0.8rem;
}

.author-row > span,
.publication-affiliations > span {
  white-space: nowrap;
}

.publication-authors a:hover {
  text-decoration: underline;
}

.publication-affiliations {
  color: var(--muted);
  font-size: 1rem;
}

.publication-byline sup {
  font-size: 0.7em;
  margin-left: 0.15em;
}

.resource-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1.5rem auto 0;
}

.resource-buttons button,
.resource-buttons a {
  align-items: center;
  background: var(--navy-deep);
  border: 1px solid transparent;
  border-radius: 999px;
  color: #fff;
  cursor: default;
  display: flex;
  font-size: 0.9rem;
  font-weight: 700;
  gap: 0.45rem;
  justify-content: center;
  min-width: 8rem;
  opacity: 1;
  padding: 0.55rem 1rem;
}

.resource-buttons a {
  cursor: pointer;
}

.resource-buttons svg {
  flex: none;
  height: 1.1rem;
  width: 1.1rem;
}

.citation-bibtex {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.5rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  text-align: left;
}

.hero-takeaway {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  margin: 0 auto;
  max-width: 58rem;
}

.task-video-grid,
.process-grid,
.message-flow,
.failure-grid,
.ablation-grid {
  display: grid;
}

.figure-shell,
.process-card,
.message-card,
.failure-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.section {
  padding: 5.25rem 1.5rem;
}

#at-a-glance {
  padding-top: 1.5rem;
}

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

.section-heading {
  margin: 0 auto 2.4rem;
  max-width: 59rem;
  text-align: center;
}

.section-heading .title {
  color: var(--ink);
  letter-spacing: -0.03em;
  margin-bottom: 0.8rem !important;
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 1.06rem;
}

.figure-shell {
  margin: 0 auto;
  overflow: hidden;
  padding: 1rem;
}

.figure-shell img {
  margin: 0 auto;
  width: 100%;
}

.figure-shell figcaption {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0.9rem auto 0.15rem;
  max-width: 64rem;
  text-align: center;
}

.overview-figure a {
  display: block;
}

.architecture-figure {
  max-width: 94rem;
}

.process-grid {
  gap: 1.25rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.process-card {
  box-shadow: none;
  padding: 1.4rem;
}

.step-number,
.message-label {
  align-items: center;
  background: var(--teal-soft);
  border-radius: 999px;
  color: var(--teal);
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 800;
  height: 2rem;
  justify-content: center;
  margin-bottom: 0.8rem;
  width: 2rem;
}

.process-card h3,
.message-card h3,
.failure-card h3 {
  color: var(--navy-deep);
  font-size: 1.12rem;
  font-weight: 750;
  margin-bottom: 0.4rem;
}

.process-card p,
.message-card p,
.failure-card p {
  color: var(--muted);
}

.message-flow {
  gap: 1.2rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  position: relative;
}

.message-card {
  box-shadow: 0 10px 32px rgb(24 58 91 / 8%);
  padding: 1.6rem;
}

.featured-message {
  border-color: rgb(17 137 129 / 50%);
  transform: translateY(-0.5rem);
}

.secondary-note {
  background: rgb(49 93 134 / 6%);
  border-left: 3px solid var(--navy);
  color: var(--muted);
  font-size: 0.9rem;
  margin: 1.5rem auto 0;
  max-width: 58rem;
  padding: 0.9rem 1rem;
}

.task-video-grid {
  gap: 1rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.task-video-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgb(24 58 91 / 10%);
  min-width: 0;
  overflow: hidden;
}

.task-card-copy {
  min-height: 7.6rem;
  padding: 1rem;
}

.task-card-copy h3 {
  color: var(--navy-deep);
  font-size: 1.02rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.task-card-copy p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.task-video-card video {
  aspect-ratio: 4 / 3;
  background: #0d1720;
  object-fit: cover;
  width: 100%;
}

.rollout-gallery {
  margin-top: 2rem;
}

.rollout-note {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 1rem;
  text-align: center;
}

.video-row {
  display: grid;
  gap: 1rem;
  margin-left: auto;
  margin-right: auto;
}

.video-row + .video-row {
  margin-top: 1rem;
}

.video-row-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: calc(75% - 0.25rem);
}

.video-row-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: 100%;
}

.rollout-tile {
  background: #0d1720;
  border: 1px solid rgb(24 58 91 / 24%);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgb(24 58 91 / 13%);
  margin: 0;
  min-width: 0;
  overflow: hidden;
  position: relative;
}

.rollout-tile video {
  aspect-ratio: 4 / 3;
  background: #0d1720;
  object-fit: cover;
  width: 100%;
}

.rollout-tile figcaption {
  background: rgb(8 18 27 / 78%);
  border-radius: 0 0 8px 0;
  color: #fff;
  font-size: 0.76rem;
  font-weight: 750;
  left: 0;
  letter-spacing: 0.01em;
  padding: 0.38rem 0.62rem;
  pointer-events: none;
  position: absolute;
  top: 0;
}


.ablation-grid {
  align-items: stretch;
  gap: 1.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ablation-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.4rem;
}

.ablation-panel-heading {
  margin-bottom: 1.1rem;
}

.ablation-panel-heading .section-kicker {
  margin-bottom: 0.35rem;
}

.ablation-panel-heading h3 {
  color: var(--navy-deep);
  font-size: clamp(1.45rem, 2vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 0.65rem;
}

.ablation-panel-heading > p {
  color: var(--muted);
  font-size: 0.96rem;
}

.ablation-panel-heading > p + p {
  margin-top: 1rem;
}

.panel-figure {
  background: transparent;
  border: 0;
  border-radius: 12px;
  box-shadow: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

.panel-figure img {
  border: 1px solid var(--line);
  border-radius: 12px;
}

.panel-figure figcaption {
  font-size: 0.84rem;
  line-height: 1.5;
  margin: 0.7rem 0 0;
  text-align: left;
}

.failure-grid {
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 1rem 0 0;
  max-width: none;
}

.failure-card {
  border-radius: 12px;
  box-shadow: none;
  padding: 1rem;
}

.failure-card h4 {
  color: var(--navy-deep);
  font-size: 1rem;
  font-weight: 750;
  margin-bottom: 0.35rem;
}

.failure-task {
  color: var(--salmon) !important;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
}

.ablation-panel .secondary-note {
  font-size: 0.82rem;
  margin-top: 1rem;
}

.results-figure {
  max-width: 74rem;
}

#experiment-result .results-figure {
  margin-top: 2rem;
}

.table-focus {
  padding: 1.35rem;
}

.results-figure img {
  max-width: 66rem;
}

.robotwin-table img {
  max-width: 69rem;
}

.compatibility-figure {
  max-width: 68rem;
}

.compatibility-figure img {
  max-width: 58rem;
}

.ablation-panel .compatibility-figure {
  max-width: none;
}

.ablation-panel .compatibility-figure img {
  max-width: 100%;
}

.project-footer {
  background: var(--navy-deep);
  color: rgb(255 255 255 / 82%);
  padding: 3rem 1.5rem;
}

.project-footer p {
  margin-bottom: 0.45rem;
}

.project-footer a {
  color: #9ee3dd;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.template-credit {
  font-size: 0.86rem;
}


@media screen and (max-width: 1023px) {
  .task-video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .video-row-three,
  .video-row-four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .video-row-three .rollout-tile:last-child {
    grid-column: 1 / -1;
    justify-self: center;
    width: calc(50% - 0.5rem);
  }
}

@media screen and (max-width: 768px) {
  html {
    scroll-behavior: auto;
  }

  .project-hero .hero-body {
    padding: 3rem 1rem 1.25rem;
  }

  .landing-splash {
    height: 76svh;
    min-height: 560px;
  }

  .landing-splash-video {
    object-fit: contain;
  }

  .landing-splash-mask {
    background: linear-gradient(180deg, rgb(6 17 29 / 48%), rgb(6 17 29 / 76%));
  }

  .landing-splash-content {
    gap: 1.4rem;
    grid-template-columns: 1fr;
    padding: 2rem 1.25rem;
  }

  .splash-name {
    font-size: clamp(3.25rem, 18vw, 5.25rem);
  }

  .splash-description {
    font-size: 0.76rem;
    margin-top: 0.65rem;
    max-width: 18rem;
  }

  .splash-divider {
    height: 1px;
    justify-self: center;
    width: min(10rem, 55vw);
  }

  .publication-title {
    font-size: clamp(2.1rem, 10.5vw, 2.7rem);
    overflow-wrap: normal;
    word-break: normal;
  }

  .section {
    padding: 4rem 1rem;
  }

  .process-grid,
  .message-flow,
  .failure-grid {
    grid-template-columns: 1fr;
  }

  .featured-message {
    transform: none;
  }

  .figure-shell {
    border-radius: 12px;
    padding: 0.65rem;
  }

  .ablation-panel {
    padding: 1rem;
  }

  .table-focus {
    padding: 0.75rem;
  }
}

@media screen and (max-width: 520px) {
  .task-video-grid {
    grid-template-columns: 1fr;
  }

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

  .video-row-three,
  .video-row-four {
    grid-template-columns: 1fr;
  }

  .video-row-three .rollout-tile:last-child {
    grid-column: auto;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

}