:root {
  --ink: #18202b;
  --muted: #5f6b7a;
  --line: #dce2e8;
  --soft: #f5f7f9;
  --blue: #2774ae;
  --dark-blue: #0f3f66;
  --gold: #ffd100;
  --white: #ffffff;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  text-decoration: none;
}

.brand-mark {
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--dark-blue);
}

.brand-sub {
  color: var(--blue);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.nav {
  display: flex;
  gap: 26px;
  align-items: center;
  font-size: .92rem;
  font-weight: 600;
}

.nav a {
  text-decoration: none;
  color: #344150;
}

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

.hero {
  background:
    radial-gradient(circle at 80% 20%, rgba(39,116,174,.16), transparent 34%),
    linear-gradient(180deg, #fbfdff 0%, #f4f8fb 100%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  min-height: 640px;
  padding: 100px 0 88px;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, .72fr);
  gap: 80px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 13px;
  color: var(--blue);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1, h2, h3, h4, p {
  margin-top: 0;
}

h1, h2 {
  font-family: "Source Serif 4", Georgia, serif;
}

h1 {
  max-width: 850px;
  margin-bottom: 24px;
  font-size: clamp(3rem, 6vw, 5.6rem);
  line-height: .98;
  letter-spacing: -.045em;
  color: #10263a;
}

.hero-lead {
  max-width: 780px;
  margin-bottom: 14px;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  line-height: 1.45;
  color: #243e54;
}

.hero-copy {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.03rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

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

.button.primary {
  background: var(--blue);
  color: white;
  box-shadow: 0 8px 24px rgba(39,116,174,.17);
}

.button.primary:hover {
  background: #1f6498;
}

.button.secondary {
  border: 1px solid #bfcbd5;
  background: rgba(255,255,255,.82);
  color: #294255;
}

.hero-card {
  padding: 34px;
  border: 1px solid #cbd8e2;
  border-top: 4px solid var(--gold);
  border-radius: 8px;
  background: rgba(255,255,255,.85);
  box-shadow: 0 24px 70px rgba(30,63,88,.10);
}

.hero-card-label {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.hero-card h2 {
  margin-bottom: 9px;
  font-size: 2rem;
  color: #12324c;
}

.hero-card p {
  color: var(--muted);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 22px;
}

.link-row a,
.person-links a {
  color: var(--blue);
  font-size: .88rem;
  font-weight: 700;
  text-decoration: none;
}

.section {
  padding: 94px 0;
}

.section-alt {
  background: var(--soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 790px;
  margin-bottom: 44px;
}

.section-heading h2,
.contact-grid h2,
.publication-inner h2 {
  margin-bottom: 14px;
  font-size: clamp(2.2rem, 4vw, 3.55rem);
  line-height: 1.08;
  letter-spacing: -.03em;
  color: #142e43;
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 1.03rem;
}

.research-grid,
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  position: relative;
  min-height: 250px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.card-number {
  display: block;
  margin-bottom: 45px;
  color: #9aa7b3;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.card h3 {
  margin-bottom: 10px;
  font-size: 1.22rem;
  color: #173b57;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: .94rem;
}

.people-block + .people-block {
  margin-top: 48px;
}

.people-block > h3 {
  padding-bottom: 11px;
  margin-bottom: 18px;
  border-bottom: 1px solid #ccd4db;
  color: #40505f;
  font-size: .84rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.person {
  min-height: 178px;
  padding: 25px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.featured-person {
  grid-column: 1 / -1;
  min-height: auto;
  flex-direction: row;
  align-items: end;
  gap: 24px;
  border-left: 4px solid var(--blue);
}

.person h4,
.name-card h4 {
  margin-bottom: 3px;
  font-size: 1.1rem;
  color: #1a344a;
}

.person p,
.name-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: .9rem;
}

.person .role {
  margin-bottom: 8px;
  color: var(--blue);
  font-weight: 700;
}

.person-links {
  display: flex;
  gap: 14px;
  margin-top: 16px;
}

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

.name-grid.compact {
  grid-template-columns: repeat(2, 1fr);
  max-width: 760px;
}

.name-card {
  min-height: 120px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.name-card a {
  display: inline-block;
  margin-top: 12px;
  color: var(--blue);
  font-size: .84rem;
  font-weight: 700;
  text-decoration: none;
}

.project-card {
  min-height: 260px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.project-card:hover {
  transform: translateY(-3px);
  border-color: #b8c8d5;
  box-shadow: 0 18px 42px rgba(30,63,88,.09);
}

.project-tag {
  margin-bottom: 32px;
  color: var(--blue);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.project-card h3 {
  margin-bottom: 10px;
  font-size: 1.28rem;
  color: #173b57;
}

.project-card p {
  color: var(--muted);
  font-size: .93rem;
}

.arrow {
  margin-top: auto;
  padding-top: 18px;
  color: #315f82;
  font-size: .86rem;
  font-weight: 700;
}

.publication-band {
  background: var(--dark-blue);
  color: #fff;
}

.publication-band .eyebrow {
  color: #8ec5ee;
}

.publication-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) auto;
  gap: 70px;
  align-items: center;
}

.publication-inner h2 {
  color: #fff;
}

.publication-inner p {
  max-width: 760px;
  margin-bottom: 0;
  color: #c9dae7;
}

.button.light {
  background: white;
  color: var(--dark-blue);
  white-space: nowrap;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 80px;
  align-items: start;
}

.contact-grid p {
  color: var(--muted);
  margin-bottom: 5px;
}

.contact-links {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.contact-links a {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: #285d84;
  font-weight: 650;
  text-decoration: none;
}

.footer {
  padding: 28px 0;
  background: #101820;
  color: #aebac5;
  font-size: .8rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 44px;
    padding: 80px 0 70px;
  }

  .research-grid,
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .name-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .publication-inner,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 35px;
  }

  .publication-inner .button {
    justify-self: start;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(calc(100% - 28px), var(--max));
  }

  .site-header {
    position: static;
  }

  .nav-wrap {
    min-height: 62px;
  }

  h1 {
    font-size: 3.05rem;
  }

  .hero {
    background: linear-gradient(180deg, #fbfdff 0%, #f4f8fb 100%);
  }

  .hero-grid {
    padding: 62px 0;
  }

  .section {
    padding: 70px 0;
  }

  .research-grid,
  .project-grid,
  .people-grid,
  .name-grid,
  .name-grid.compact {
    grid-template-columns: 1fr;
  }

  .featured-person {
    flex-direction: column;
    align-items: flex-start;
  }

  .card {
    min-height: auto;
  }

  .card-number {
    margin-bottom: 26px;
  }

  .footer-inner {
    flex-direction: column;
  }
}