:root {
  --bg: #090b11;
  --panel: rgba(14, 18, 27, 0.82);
  --border: rgba(148, 163, 184, 0.18);
  --text: #e5e7eb;
  --muted: #94a3b8;
  --muted-strong: #cbd5e1;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --accent-soft: rgba(125, 211, 252, 0.12);
  --shadow: 0 24px 80px rgba(2, 6, 23, 0.45);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.research-body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.12), transparent 30%),
    linear-gradient(180deg, #06080d 0%, #0b1020 48%, #090b11 100%);
}

body.research-body ::selection {
  background: rgba(56, 189, 248, 0.3);
}

.page-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.site-nav {
  position: sticky;
  top: 16px;
  z-index: 20;
  margin-bottom: 32px;
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(8, 12, 20, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
}

.brand-kicker,
.section-kicker,
.eyebrow,
.media-kicker,
.trust-label,
.citation-meta {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.brand-name {
  display: block;
  font-weight: 700;
  color: #f8fafc;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

.nav-links a,
.text-link {
  color: var(--muted-strong);
  text-decoration: none;
  transition: color 0.2s ease;
}

.text-link {
  text-underline-offset: 0.18em;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.text-link:hover,
.text-link:focus-visible {
  color: #fff;
}

.brand:focus-visible,
.nav-links a:focus-visible,
.primary-action:focus-visible,
.secondary-action:focus-visible,
.text-link:focus-visible,
.hero-video:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.hero-section {
  padding: 36px 0 20px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.hero-copy,
.hero-media-card,
.content-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 36px;
}

.hero-copy h1,
.section-heading h2,
.hero-media-card h2,
.prediction-card h3,
.paper-grid h3 {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  color: #f8fafc;
}

.hero-copy h1 {
  margin-top: 12px;
  font-size: clamp(2.7rem, 6vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.hero-subhead {
  margin: 20px 0 0;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  line-height: 1.45;
  color: var(--muted-strong);
  max-width: 42rem;
}

.media-copy p,
.lead,
.section-intro,
.reading-column p,
.paper-grid p,
.citation-note,
.site-footer p,
.prediction-card p,
.trust-cluster p,
.signal-list li {
  color: var(--muted);
  line-height: 1.7;
}

.hero-note {
  margin: 14px 0 0;
  color: var(--muted-strong);
  font-size: 0.95rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 24px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.primary-action {
  background: linear-gradient(135deg, #f8fafc 0%, #cbd5e1 100%);
  color: #020617;
}

.secondary-action {
  border: 1px solid rgba(148, 163, 184, 0.25);
  color: #e2e8f0;
  background: rgba(15, 23, 42, 0.72);
}

.primary-action:hover,
.secondary-action:hover,
.primary-action:focus-visible,
.secondary-action:focus-visible {
  transform: translateY(-1px);
}

.trust-cluster {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.trust-cluster article,
.prediction-card,
.paper-grid article {
  padding: 18px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.76);
  border: 1px solid rgba(148, 163, 184, 0.14);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.trust-cluster article:hover,
.prediction-card:hover,
.paper-grid article:hover {
  transform: translateY(-2px);
  border-color: rgba(125, 211, 252, 0.3);
  background: rgba(15, 23, 42, 0.92);
}

.trust-cluster strong {
  display: block;
  margin: 8px 0;
  color: #f8fafc;
}

.hero-media-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-media-card h2 {
  margin-top: 10px;
  font-size: 1.45rem;
  line-height: 1.25;
}

.hero-video {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: #020617;
  aspect-ratio: 16 / 9;
}

.content-stack {
  display: grid;
  gap: 22px;
  margin-top: 18px;
}

.content-panel {
  padding: 30px;
  scroll-margin-top: 110px;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.section-heading h2 {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.1;
}

.spotlight-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.9fr);
  gap: 26px;
  align-items: start;
}

.lead {
  margin: 0;
  font-size: 1.05rem;
  max-width: 50rem;
}

.signal-list {
  margin: 0;
  padding-left: 20px;
}

.signal-list li + li {
  margin-top: 10px;
}

.prediction-grid,
.paper-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 14px;
}

.prediction-card h3,
.paper-grid h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.reading-column {
  display: grid;
  gap: 16px;
  max-width: 56rem;
}

.reading-column p,
.section-intro,
.equation-caption,
.citation-note {
  margin: 0;
}

.equation-box,
.citation-block {
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(2, 6, 23, 0.78);
}

.equation-box {
  padding: 24px 20px;
  color: #f8fafc;
  font-size: 1.08rem;
}

.equation-caption {
  margin-top: 14px;
  color: var(--muted);
}

.section-intro {
  max-width: 58rem;
}

.citation-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: 20px;
  align-items: start;
}

.citation-block {
  margin: 0;
  padding: 20px;
  color: #dbeafe;
}

.site-footer {
  display: grid;
  gap: 8px;
  padding: 26px 8px 0;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 960px) {
  .hero-grid,
  .spotlight-grid,
  .citation-layout,
  .prediction-grid,
  .paper-grid,
  .trust-cluster {
    grid-template-columns: 1fr;
  }

  .nav-inner {
    border-radius: 24px;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1120px);
    padding-top: 12px;
  }

  .hero-copy,
  .hero-media-card,
  .content-panel {
    padding: 22px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .primary-action,
  .secondary-action {
    width: 100%;
  }
}