:root {
  --ink: #172233;
  --muted: #5d6977;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --soft-2: #edf3f5;
  --accent: #1d657b;
  --accent-dark: #124657;
  --line: #d7e0e4;
  --max: 1160px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

.container {
  width: min(calc(100% - 44px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

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

.brand {
  color: var(--ink);
  text-decoration: none;
  font-weight: 760;
  letter-spacing: -.015em;
  white-space: nowrap;
}

nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: .94rem;
  font-weight: 520;
}

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

.menu-button {
  display: none;
  border: 1px solid var(--line);
  background: white;
  border-radius: 8px;
  padding: 9px 12px;
  font: inherit;
  color: var(--ink);
}

.hero {
  padding: 86px 0 82px;
  background:
    radial-gradient(circle at 86% 20%, rgba(29,101,123,.08), transparent 30%),
    linear-gradient(180deg, #f9fbfc 0%, #ffffff 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, .65fr);
  gap: 70px;
  align-items: center;
}

.eyebrow, .section-label, .smallcaps, .card-kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .76rem;
}

h1 {
  margin: 0;
  font-size: clamp(3.4rem, 6vw, 5.4rem);
  line-height: .98;
  letter-spacing: -.05em;
}

.credentials {
  margin: 20px 0 0;
  color: var(--accent-dark);
  font-size: 1.03rem;
  font-weight: 680;
}

.lead {
  max-width: 780px;
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  line-height: 1.42;
  margin: 30px 0 18px;
}

.hero-copy {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.06rem;
}

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

.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
}

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

.primary:hover { background: var(--accent-dark); }

.secondary {
  border: 1px solid var(--line);
  color: var(--ink);
  background: white;
}

.portrait-card { margin: 0; }

.portrait-placeholder {
  min-height: 365px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(150deg, #eef4f6 0%, #f8fafb 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 30px;
  color: var(--muted);
  box-shadow: 0 16px 50px rgba(23,34,51,.07);
}

.initials {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: white;
  border: 1px solid var(--line);
  color: var(--accent);
  font-size: 2rem;
  font-weight: 780;
  margin-bottom: 20px;
}

figcaption {
  padding: 12px 8px 0;
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.45;
}

.section { padding: 88px 0; }

.alt { background: var(--soft); }

.split-intro,
.contact-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 70px;
  align-items: start;
}

.prose p:first-child { margin-top: 0; }

h2 {
  margin: 0 0 24px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -.035em;
}

h3 {
  margin-top: 0;
  line-height: 1.25;
  letter-spacing: -.015em;
}

.section-intro {
  max-width: 810px;
  color: var(--muted);
  font-size: 1.08rem;
  margin: -4px 0 36px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  min-height: 230px;
}

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

.card-kicker { display: block; margin-bottom: 10px; }

.publication-feature {
  margin-top: 30px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(135deg, #f8fbfc 0%, #eef4f6 100%);
  display: grid;
  grid-template-columns: 1fr 150px;
  gap: 40px;
  align-items: center;
}

.book-mark {
  height: 150px;
  border-radius: 12px;
  background: var(--accent);
  color: white;
  display: grid;
  place-items: center;
  text-align: center;
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: .04em;
}

.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 58px;
}

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

.clean-list li { margin: 8px 0; }

.text-link {
  display: inline-block;
  margin-top: 10px;
  font-weight: 720;
  text-decoration: none;
}

.timeline {
  margin-top: 42px;
  border-top: 1px solid var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 30px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item h3 { margin-bottom: 6px; }
.timeline-item p { margin: 0; color: var(--muted); }

.timeline-date {
  font-weight: 800;
  color: var(--accent);
}

.topics { margin-top: 48px; }

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-tags span {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  font-size: .9rem;
}

.email a {
  font-size: clamp(1.45rem, 3vw, 2rem);
  font-weight: 760;
  text-decoration: none;
}

.muted, .note { color: var(--muted); }

.note {
  margin-top: 24px;
  font-size: .94rem;
}

footer {
  border-top: 1px solid var(--line);
  padding: 32px 0 42px;
  color: var(--muted);
  font-size: .86rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 40px;
}

@media (max-width: 980px) {
  .menu-button { display: inline-block; }
  nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--line);
    padding: 18px 22px 22px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  nav.open { display: flex; }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .portrait-card { max-width: 430px; }

  .split-intro,
  .contact-grid,
  .research-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .hero { padding: 64px 0; }
  .section { padding: 66px 0; }
  h1 { font-size: clamp(3rem, 16vw, 4.1rem); }
  .cards { grid-template-columns: 1fr; }
  .publication-feature { grid-template-columns: 1fr; }
  .book-mark { height: 110px; }
  .timeline-item { grid-template-columns: 70px 1fr; gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 10px; }
}