:root {
  --bg: #f4f1ea;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --text: #1b1b18;
  --muted: #5f625d;
  --line: rgba(31, 35, 26, 0.12);
  --accent: #0f766e;
  --accent-deep: #115e59;
  --shadow: 0 22px 50px rgba(25, 30, 24, 0.08);
  --radius-lg: 28px;
  --radius-md: 20px;
  --container: 1140px;
  --narrow: 860px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Source Sans 3", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(198, 177, 143, 0.18), transparent 22%),
    linear-gradient(180deg, #f7f3ed 0%, #f4f1ea 28%, #efeae1 100%);
  line-height: 1.6;
}

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

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

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

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.narrow {
  width: min(calc(100% - 2rem), var(--narrow));
}

.section-nav {
  position: fixed;
  top: 50%;
  right: 1.2rem;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transform: translateY(-50%);
  padding: 0.8rem 0.55rem;
  border-radius: 999px;
  background: rgba(20, 21, 19, 0.86);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

.section-nav__dot {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.34);
  transition: transform 180ms ease, background 180ms ease;
}

.section-nav__dot:hover,
.section-nav__dot.is-active {
  background: #c7efe5;
  transform: scale(1.18);
}

.hero {
  padding: 5rem 0 3.5rem;
}

.hero__content {
  text-align: center;
}

.section-heading__kicker {
  margin: 0 0 0.65rem;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero__title,
.section-heading h2,
.carousel-block h3,
.featured-demo h3 {
  font-family: "Crimson Text", serif;
  letter-spacing: -0.02em;
}

.hero__title {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 1rem;
  font-size: clamp(1.45rem, 3.8vw, 4rem);
  line-height: 1.08;
}

.hero__title-line {
  display: block;
  white-space: nowrap;
}

.hero__authors,
.hero__affiliations {
  margin: 0 auto;
  max-width: 850px;
}

.hero__authors {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  font-size: 1.08rem;
}

.author-name {
  white-space: nowrap;
}

.author-name sup,
.hero__affiliations sup {
  font-size: 0.68em;
  line-height: 0;
  vertical-align: super;
}

.hero__affiliations {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 1rem;
}

.hero__affiliations-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem 1.2rem;
}

.hero__affiliations p {
  margin: 0.15rem 0;
  white-space: nowrap;
}

.hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.action-button,
.copy-button,
.carousel-arrow,
.carousel-dot {
  border: none;
  cursor: pointer;
}

.action-button {
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  font-weight: 700;
  color: inherit;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.action-button:hover {
  transform: translateY(-2px);
  background: #fcfbf9;
  box-shadow: 0 16px 30px rgba(25, 30, 24, 0.1);
}

.section {
  padding: 2rem 0 5rem;
}

.section--alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.2));
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2,
.carousel-block h3,
.featured-demo h3 {
  margin: 0;
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  line-height: 1.1;
}

.card,
.media-panel,
.carousel-block,
.featured-demo,
.citation-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.card,
.citation-card {
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.7rem;
}

.prose p {
  margin: 0;
  font-size: 1.08rem;
  color: #30322f;
}

.abstract-container {
  width: min(calc(100% - 2rem), 1040px);
}

.media-panel {
  margin: 0;
  padding: 1.3rem;
  border-radius: var(--radius-lg);
}

.image-frame {
  position: relative;
  overflow: hidden;
  max-width: 56%;
  margin: 0 auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(31, 95, 91, 0.12), rgba(217, 205, 183, 0.4)),
    #f7f5f0;
  min-height: 170px;
}

.image-frame img {
  width: 100%;
  height: auto;
  min-height: 170px;
  object-fit: contain;
}

.image-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  gap: 0.4rem;
  text-align: center;
  padding: 1.5rem;
  color: var(--muted);
}

.image-fallback strong {
  color: var(--text);
  font-size: 1.05rem;
}

.media-caption {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.results-group {
  display: grid;
  gap: 1.6rem;
}

.carousel-block {
  border-radius: var(--radius-lg);
  padding: 1.4rem;
}

.carousel-block__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.carousel-block__header p,
.featured-demo p {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.carousel-stage {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.9rem;
  align-items: center;
}

.carousel-arrow {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  color: var(--text);
  transition: transform 180ms ease, background 180ms ease;
}

.carousel-arrow:hover {
  transform: translateY(-1px);
  background: #fdfcf9;
}

.carousel {
  overflow: hidden;
}

.carousel__track {
  display: flex;
  gap: 1rem;
  transition: transform 320ms ease;
  will-change: transform;
}

.video-card {
  flex: 0 0 calc((100% - 1rem) / 2);
  min-width: 0;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.video-card p {
  margin: 1rem 0 0;
  color: var(--muted);
}

.video-shell {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(31, 95, 91, 0.14), rgba(232, 222, 209, 0.5)),
    #ece8e1;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
}

.video-shell video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: transparent;
}

.carousel-pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.carousel-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  background: rgba(31, 35, 26, 0.18);
  transition: transform 180ms ease, background 180ms ease;
}

.carousel-dot.is-active {
  background: var(--accent);
  transform: scale(1.15);
}

.featured-demo {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
}

.featured-demo__header h3 {
  margin: 0;
}

.video-shell--featured {
  aspect-ratio: 16 / 9;
  min-height: 300px;
}

.citation-card {
  position: relative;
}

.copy-button {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease;
}

.copy-button:hover {
  transform: translateY(-1px);
  background: var(--accent-deep);
}

.citation-card pre {
  margin: 0;
  overflow-x: auto;
  padding-right: 6.5rem;
}

.citation-card code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer {
  padding: 1.5rem 0 2.5rem;
}

.footer__content {
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer__content p {
  display: inline-block;
  margin: 0;
  padding: 0.95rem 1.2rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(15, 118, 110, 0.08);
}

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

@media (max-width: 900px) {
  .video-card {
    flex-basis: 100%;
  }

  .section-nav {
    display: none;
  }

  .image-frame,
  .image-frame img {
    min-height: 150px;
  }
}

@media (max-width: 720px) {
  .hero {
    padding-top: 4rem;
  }

  .hero__title {
    font-size: clamp(1.2rem, 5vw, 2rem);
    line-height: 1.12;
  }

  .section {
    padding: 1.5rem 0 4rem;
  }

  .carousel-block,
  .featured-demo,
  .card,
  .citation-card,
  .media-panel {
    padding: 1.1rem;
  }

  .hero__content {
    padding: 2rem 1rem 1.7rem;
  }

  .hero__affiliations-row {
    display: block;
  }

  .hero__affiliations p {
    white-space: normal;
  }

  .carousel-block__header {
    flex-direction: column;
  }

  .carousel-stage {
    gap: 0.75rem;
  }

  .copy-button {
    position: static;
    margin-bottom: 1rem;
  }

  .citation-card pre {
    padding-right: 0;
  }
}

@media (max-width: 420px) {
  .hero__title {
    font-size: 1.05rem;
    line-height: 1.14;
  }
}