* { box-sizing: border-box; }

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #111317;
  --muted: #676d75;
  --line: #e3e6ea;
  --accent: #111317;
}

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(227,230,234,.9);
  background: rgba(246,247,249,.92);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { font-weight: 800; letter-spacing: -.02em; }
nav { display: flex; gap: 24px; font-size: 14px; color: var(--muted); }
nav a:hover { color: var(--text); }

.hero {
  padding: 90px 0 80px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 56px;
  align-items: center;
}

.eyebrow, .section-kicker {
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  font-weight: 800;
  color: var(--muted);
}

h1 {
  font-size: clamp(48px, 7vw, 88px);
  line-height: .98;
  letter-spacing: -.055em;
  margin: 14px 0 24px;
  max-width: 900px;
}

h2 {
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.05;
  letter-spacing: -.04em;
  margin: 10px 0 30px;
}

h3 { margin-top: 0; line-height: 1.2; letter-spacing: -.02em; }

.lead {
  max-width: 760px;
  font-size: 20px;
  color: var(--muted);
}

.lead-small { font-size: 18px; color: var(--muted); }

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

.btn {
  display: inline-block;
  border: 1px solid var(--text);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
}

.btn.primary {
  background: var(--text);
  color: white;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px;
  box-shadow: 0 20px 70px rgba(0,0,0,.06);
}

.visual {
  aspect-ratio: 4 / 5;
  border-radius: 16px;
  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,.95) 0 2%, transparent 3%),
    radial-gradient(circle at 70% 20%, rgba(255,255,255,.8) 0 2%, transparent 3%),
    radial-gradient(circle at 42% 76%, rgba(255,255,255,.7) 0 2%, transparent 3%),
    linear-gradient(145deg, #1c2230, #4c5361 55%, #111317);
  display: grid;
  place-items: end start;
  padding: 24px;
  color: white;
  font-weight: 900;
  font-size: 34px;
  line-height: .92;
  letter-spacing: -.04em;
}

.hero-card p { color: var(--muted); font-size: 13px; margin: 14px 4px 2px; }

.section { padding: 90px 0; border-bottom: 1px solid var(--line); }
.section.alt { background: var(--surface); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
}

.card p, .text-block p, .note { color: var(--muted); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.text-block { font-size: 18px; padding-top: 24px; }

.publication {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 22px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.publication:last-of-type { border-bottom: 1px solid var(--line); }
.year { color: var(--muted); font-weight: 700; }
.publication h3 { margin-bottom: 6px; }
.publication p { margin: 0; color: var(--muted); }

.contact { text-align: center; }
.contact .wrap { max-width: 900px; }
.contact .btn { margin-top: 16px; }

footer { padding: 28px 0 44px; color: var(--muted); font-size: 13px; }

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

@media (max-width: 820px) {
  nav { display: none; }
  .hero { padding-top: 56px; }
  .hero-grid, .split, .cards { grid-template-columns: 1fr; }
  .hero-grid { gap: 36px; }
  .visual { aspect-ratio: 16 / 10; }
  .cards { gap: 12px; }
  .publication { grid-template-columns: 1fr; gap: 4px; }
  .footer-row { flex-direction: column; }
}