/* Frontpage-only presentation. Shared design tokens and base layout live in jacobsresearch-core.css. */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(244,245,243,.88);
  border-bottom: 1px solid rgba(48,45,43,.08);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  letter-spacing: -.02em;
  font-weight: 760;
  font-size: 1.2rem;
}

.brand span {
  color: var(--warm);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: .94rem;
  font-weight: 650;
  transition: .2s ease;
}

.nav-link:hover {
  background: rgba(185,196,202,.30);
  border-color: rgba(59,67,74,.12);
}

.hero-wrap {
  padding: 42px 0 26px;
}

.hero {
  min-height: 500px;
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  box-shadow: var(--shadow);
  background:
    radial-gradient(circle at 76% 24%, rgba(219,227,229,.34), transparent 0 18%, transparent 42%),
    radial-gradient(circle at 87% 64%, rgba(185,196,202,.22), transparent 0 16%, transparent 40%),
    linear-gradient(135deg, #303438 0%, var(--slate) 48%, #617079 100%);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg,
      rgba(44,45,43,.93) 0%,
      rgba(44,45,43,.79) 36%,
      rgba(44,45,43,.30) 68%,
      rgba(44,45,43,.12) 100%);
  z-index: 1;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(0deg, rgba(48,45,43,.18), transparent 45%),
    repeating-linear-gradient(115deg, rgba(255,255,255,.018) 0 1px, transparent 1px 16px);
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  min-height: 500px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  width: min(670px, 90%);
  padding: clamp(34px, 6vw, 74px);
  color: var(--white);
}

.eyebrow {
  margin: 0 0 14px;
  color: #d8e0e2;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .78rem;
  font-weight: 800;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.5rem, 5vw, 5.2rem);
  line-height: .98;
  letter-spacing: -.035em;
  font-weight: 600;
}

.hero-text {
  margin: 24px 0 0;
  max-width: 640px;
  color: rgba(255,255,255,.84);
  font-size: clamp(1rem, 1.5vw, 1.16rem);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 760;
  font-size: .94rem;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-light {
  background: #eef2f2;
  color: var(--ink);
  border: 1px solid rgba(255,255,255,.55);
}

.btn-ghost {
  color: #fff;
  border: 1px solid rgba(255,255,255,.48);
  background: rgba(255,255,255,.07);
}

section {
  scroll-margin-top: 92px;
}

.section {
  padding: 62px 0;
}

.section-kicker {
  color: var(--warm);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .76rem;
  font-weight: 800;
  margin: 0 0 10px;
}

.section-title {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 3.3vw, 3.2rem);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -.025em;
}

.section-intro {
  max-width: 760px;
  color: var(--stone);
  margin: 16px 0 0;
  font-size: 1.04rem;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
  margin-top: 30px;
}

.research-card {
  grid-column: span 12;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  min-height: 300px;
  overflow: hidden;
  background: rgba(255,255,255,.66);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 36px rgba(48,45,43,.06);
}

.research-copy {
  padding: clamp(28px, 5vw, 54px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.research-label {
  color: var(--warm);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 9px;
}

.research-card h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 3vw, 3rem);
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -.02em;
}

.research-card p {
  margin: 16px 0 0;
  max-width: 680px;
  color: var(--stone);
}

.research-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.research-actions .btn {
  min-height: 42px;
  padding-inline: 15px;
  background: #fff;
  border: 1px solid rgba(48,45,43,.18);
  color: var(--ink);
}

.research-actions .btn:first-child {
  background: var(--slate);
  color: #fff;
  border-color: var(--slate);
}

.research-visual {
  min-height: 300px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 68% 35%, rgba(255,255,255,.32), transparent 0 18%, transparent 42%),
    linear-gradient(145deg, var(--sky) 0%, #a8b5bb 48%, var(--slate) 100%);
}

.research-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(244,245,243,.30), transparent 36%),
    repeating-linear-gradient(25deg, rgba(48,45,43,.04) 0 1px, transparent 1px 14px);
}

.research-visual::after {
  content: "01";
  position: absolute;
  left: 26px;
  top: 18px;
  color: rgba(255,255,255,.38);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(4.5rem, 9vw, 8rem);
  line-height: 1;
}

.research-visual span {
  position: absolute;
  z-index: 1;
  right: 18px;
  bottom: 16px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(44,45,43,.72);
  color: rgba(255,255,255,.9);
  font-size: .72rem;
  backdrop-filter: blur(8px);
}

.about-panel {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: 42px;
  align-items: start;
  padding: clamp(28px, 5vw, 54px);
  background: #dde4e5;
  border: 1px solid rgba(59,67,74,.11);
  border-radius: var(--radius);
}

.about-panel p {
  margin: 0;
  color: #4a4d4c;
  max-width: 760px;
}

.about-panel p + p {
  margin-top: 16px;
}

footer {
  margin-top: 36px;
  background: #333638;
  color: rgba(255,255,255,.78);
}

.footer-inner {
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: .9rem;
  text-align: center;
}

.visitor-ticker {
  display: inline-flex;
  align-items: baseline;
  gap: .35em;
  color: rgba(255,255,255,.68);
  white-space: normal;
}

.visitor-ticker[hidden] {
  display: none;
}

.visitor-ticker::before {
  content: " · ";
  color: rgba(255,255,255,.48);
}

.visitor-ticker strong {
  color: #fff;
  font-weight: 700;
}

@media (max-width: 820px) {
  .site-header {
    position: relative;
  }

  .nav {
    align-items: flex-start;
    padding: 18px 0;
    flex-direction: column;
  }

  .hero-wrap {
    padding-top: 20px;
  }

  .hero,
  .hero-content {
    min-height: 540px;
  }

  .hero::before {
    background:
      linear-gradient(0deg,
        rgba(44,45,43,.90) 0%,
        rgba(44,45,43,.68) 58%,
        rgba(44,45,43,.18) 100%);
  }

  .hero-content {
    justify-content: flex-end;
    width: 100%;
    padding: 34px 26px;
  }

  .research-card {
    grid-template-columns: 1fr;
  }

  .research-visual {
    order: -1;
    min-height: 220px;
  }

  .about-panel {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .footer-inner {
    align-items: flex-start;
    justify-content: center;
    flex-direction: column;
    padding: 24px 0;
  }
}