:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #0b1f3a;
  --muted: #53657a;
  --line: #dbe2ea;
  --accent: #173f6b;
  --navy: #081d36;
  --on-navy: #ffffff;
  --on-navy-muted: #b9c8d8;
  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }

.site-header, main, footer {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  background: var(--navy);
  box-shadow: 0 0 0 100vmax var(--navy);
  clip-path: inset(0 -100vmax);
  border-bottom: 1px solid rgba(255, 255, 255, .22);
  color: var(--on-navy);
}

.brand { font-size: 1rem; font-weight: 800; letter-spacing: .12em; }
.brand span, .hero h1 span { color: #9fc4e8; }

nav {
  display: flex;
  gap: clamp(18px, 3vw, 38px);
  color: var(--on-navy-muted);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .04em;
}

nav a:hover, .hero .text-link:hover { color: var(--on-navy); }
footer a:hover { color: var(--accent); }

.hero {
  display: flex;
  min-height: min(680px, calc(100vh - 88px));
  flex-direction: column;
  justify-content: center;
  padding: 96px 0;
  background: var(--navy);
  box-shadow: 0 0 0 100vmax var(--navy);
  clip-path: inset(0 -100vmax);
  color: var(--on-navy);
}

.hero .eyebrow { color: #9fc4e8; }
.hero .lead { color: var(--on-navy-muted); }

.eyebrow, .section-number {
  margin: 0 0 20px;
  color: var(--accent);
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .15em;
}

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

h1 {
  max-width: 900px;
  margin-bottom: 30px;
  font-size: clamp(3rem, 8vw, 6.8rem);
  font-weight: 650;
  letter-spacing: -.055em;
  line-height: .98;
}

.lead {
  max-width: 690px;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.hero-links { display: flex; align-items: center; gap: 30px; }

.button {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  background: var(--on-navy);
  color: var(--navy);
  font-size: .9rem;
  font-weight: 650;
}

.button:hover { background: #dbe9f6; }
.text-link { font-size: .9rem; font-weight: 650; }

.section {
  padding: 110px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 24px;
}

.split {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 72px;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 620;
  letter-spacing: -.04em;
  line-height: 1;
}

.section-body { max-width: 700px; }
.section-body > p:last-child { margin-bottom: 0; }

.large-copy {
  color: var(--text);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.55;
}

.section-body p:not(.large-copy), .section-heading > p, .project p,
.muted, .empty-state span { color: var(--muted); }

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 58px;
}

.section-heading > p { max-width: 340px; margin-bottom: 0; text-align: right; }

.project {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 72px;
  padding: 42px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.project-meta {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

h3 { margin-bottom: 12px; font-size: 1.5rem; font-weight: 650; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--muted);
  font-size: .75rem;
}

.research-list {
  margin: 34px 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.research-list li {
  display: flex;
  gap: 24px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.research-list span { color: var(--accent); font-size: .72rem; }
.muted { font-size: .9rem; }

.empty-state {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 42px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.empty-state p, .empty-state span { margin: 0; }
.contact { text-align: center; }

.contact-copy {
  max-width: 600px;
  margin: 32px auto;
  color: var(--muted);
  font-size: 1.12rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  font-size: .85rem;
  font-weight: 650;
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 34px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
}

footer p { margin: 0; }

@media (max-width: 720px) {
  .site-header, main, footer { width: min(calc(100% - 32px), var(--max-width)); }
  .site-header { align-items: flex-start; min-height: auto; padding: 24px 0; }
  nav { max-width: 230px; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; }
  .hero { min-height: 660px; padding: 80px 0; }
  .section { padding: 78px 0; }
  .split, .project { grid-template-columns: 1fr; gap: 42px; }
  .section-heading, .empty-state { align-items: flex-start; flex-direction: column; }
  .section-heading > p { text-align: left; }
  .contact-links { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}