:root {
  --bg: #f6f1e7;
  --bg-soft: rgba(255, 252, 247, 0.76);
  --surface: #fffdf9;
  --surface-strong: #fffaf1;
  --ink: #16212d;
  --muted: #5d6874;
  --line: rgba(22, 33, 45, 0.12);
  --line-strong: rgba(22, 33, 45, 0.18);
  --accent: #0d8d83;
  --accent-2: #ff8757;
  --accent-3: #ffd166;
  --shadow: 0 20px 70px rgba(22, 33, 45, 0.11);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1420px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(13, 141, 131, 0.15), transparent 34%),
    radial-gradient(circle at 100% 15%, rgba(255, 135, 87, 0.18), transparent 28%),
    linear-gradient(180deg, #fbf8f1 0%, #f4efe4 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

.page-glow {
  position: fixed;
  width: 34vw;
  height: 34vw;
  border-radius: 999px;
  filter: blur(70px);
  opacity: 0.28;
  pointer-events: none;
  z-index: -1;
}

.page-glow-left {
  left: -10vw;
  top: 10vh;
  background: rgba(13, 141, 131, 0.28);
}

.page-glow-right {
  right: -10vw;
  top: 26vh;
  background: rgba(255, 135, 87, 0.22);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(var(--max-width), calc(100vw - 28px));
  margin: 14px auto 0;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: 999px;
  backdrop-filter: blur(18px);
  background: rgba(255, 248, 238, 0.78);
  box-shadow: 0 10px 30px rgba(22, 33, 45, 0.08);
}

.brand {
  text-decoration: none;
  font-family: "Fraunces", serif;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
}

.header-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 160ms ease;
}

.header-nav a:hover {
  color: var(--ink);
}

main {
  width: min(var(--max-width), calc(100vw - 28px));
  margin: 0 auto 56px;
}

.hero {
  display: block;
  padding: 52px 0 18px;
}

.hero-copy,
.summary-card,
.panel,
.controls {
  animation: rise-in 620ms ease both;
}

.hero-copy {
  max-width: 1320px;
}

.eyebrow,
.section-kicker,
.summary-label {
  margin: 0 0 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.9rem, 4.6vw, 4.8rem);
  line-height: 1.02;
  max-width: 26ch;
  text-wrap: balance;
}

.subtitle {
  margin: 18px 0 0;
  max-width: 84ch;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.78;
}

.authors,
.affiliations,
.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.authors {
  margin-top: 24px;
  font-size: 1rem;
  line-height: 1.65;
}

.authors span,
.affiliations span {
  min-width: 0;
}

.authors a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}

.authors a:hover {
  color: var(--accent);
  border-color: rgba(13, 141, 131, 0.32);
}

.affiliations {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.96rem;
}

.correspondence {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-facts {
  margin-top: 22px;
}

.stat-pill {
  padding: 9px 14px;
  border: 1px solid rgba(13, 141, 131, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  color: #274145;
  font-size: 0.9rem;
}

.summary-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.hero > *,
.summary-band > *,
.insight-grid > *,
.figure-pair > *,
.split-layout > * {
  min-width: 0;
}

.summary-card,
.panel,
.controls,
.callout-card,
.video-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-soft);
  box-shadow: var(--shadow);
}

.summary-card {
  padding: 22px;
}

.summary-card h2 {
  margin-top: 2px;
  font-size: 1.48rem;
  line-height: 1.08;
}

.summary-card p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.panel,
.controls {
  margin-top: 22px;
  padding: 26px;
}

.section-heading {
  display: grid;
  gap: 6px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  line-height: 1.02;
  max-width: 18ch;
  overflow-wrap: anywhere;
}

.lead,
.split-copy p,
.callout-card p {
  color: var(--muted);
  line-height: 1.84;
  font-size: 1rem;
}

.lead {
  margin-top: 18px;
  max-width: 85ch;
}

.insight-grid,
.figure-pair,
.split-layout {
  display: grid;
  gap: 18px;
}

.insight-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
}

.insight-card,
.callout-card {
  padding: 22px;
  background: rgba(255, 253, 249, 0.88);
  border-radius: var(--radius-md);
}

.insight-card {
  border: 1px solid rgba(22, 33, 45, 0.08);
}

.insight-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(13, 141, 131, 0.12);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.92rem;
}

.insight-card h3,
.callout-card h3 {
  margin-top: 16px;
  font-size: 1.28rem;
}

.insight-card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.figure-layout {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

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

.figure-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(22, 33, 45, 0.09);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
}

.figure-card a {
  display: block;
}

.figure-card img {
  width: 100%;
  background: var(--surface-strong);
}

.figure-card figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.62;
}

.figure-card-wide img {
  width: 100%;
}

.split-layout {
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  align-items: start;
  margin-top: 22px;
}

.feature-list {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.top-gap {
  margin-top: 18px;
}

.controls {
  display: grid;
  gap: 18px;
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

#search {
  min-width: min(320px, 100%);
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  font: inherit;
  color: var(--ink);
}

#search:focus-visible {
  outline: 2px solid rgba(13, 141, 131, 0.24);
  outline-offset: 2px;
}

#stats {
  color: var(--muted);
  font-size: 0.95rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.featured-grid {
  margin-top: 22px;
}

.video-card {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.84);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.video-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 50px rgba(22, 33, 45, 0.14);
}

.video-frame {
  position: relative;
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 24% 18%, rgba(13, 141, 131, 0.12), transparent 28%),
    linear-gradient(180deg, #fffefb 0%, #f4efe7 100%);
}

.video-frame video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px 16px;
}

.video-title {
  margin: 0;
  font-weight: 500;
}

.badge {
  flex-shrink: 0;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(13, 141, 131, 0.12);
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
}

.empty-state {
  padding: 24px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  color: var(--muted);
  text-align: center;
  background: rgba(255, 255, 255, 0.58);
}

.citation-box {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

#bibtex {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid rgba(22, 33, 45, 0.08);
  background: #fffdf9;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92rem;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  text-decoration: none;
  font: inherit;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(22, 33, 45, 0.09);
  border-color: rgba(22, 33, 45, 0.18);
}

.btn.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, #182333 0%, #0d8d83 100%);
}

.btn.small {
  padding: 9px 13px;
  font-size: 0.92rem;
}

.btn.disabled,
.btn[aria-disabled="true"] {
  cursor: default;
  color: #7d8793;
  background: rgba(255, 255, 255, 0.54);
}

.btn.disabled:hover,
.btn[aria-disabled="true"]:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--line);
}

.site-footer {
  width: min(var(--max-width), calc(100vw - 28px));
  margin: 0 auto 34px;
  padding: 10px 4px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 6px 0;
}

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

sup {
  font-size: 0.72em;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .split-layout,
  .summary-band,
  .insight-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 18ch;
  }
}

@media (max-width: 800px) {
  .site-header {
    width: calc(100vw - 20px);
    margin-top: 10px;
    padding: 14px 16px;
    border-radius: 24px;
    align-items: flex-start;
    flex-direction: column;
  }

  .header-nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  main,
  .site-footer {
    width: calc(100vw - 20px);
  }

  .hero {
    padding-top: 34px;
  }

  .panel,
  .controls {
    padding: 22px 18px;
  }

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

@media (max-width: 540px) {
  body {
    background:
      radial-gradient(circle at 16% 0%, rgba(13, 141, 131, 0.18), transparent 30%),
      radial-gradient(circle at 100% 10%, rgba(255, 135, 87, 0.18), transparent 24%),
      linear-gradient(180deg, #fbf8f1 0%, #f4efe4 100%);
  }

  h1 {
    font-size: 2.8rem;
    max-width: 14ch;
  }

  .section-heading h2,
  .summary-card h2 {
    font-size: 1.62rem;
  }

  .authors,
  .affiliations {
    gap: 8px 12px;
  }

  .hero-actions,
  .hero-facts {
    gap: 10px;
  }

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

  #search {
    min-width: 100%;
  }
}