:root {
  --ink: #172033;
  --muted: #5e687b;
  --paper: #ffffff;
  --soft: #f3f5f8;
  --navy: #102a43;
  --blue: #175cd3;
  --gold: #c8912f;
  --line: #dfe4ea;
  --shadow: 0 18px 50px rgba(18, 42, 66, 0.12);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.65;
}
a { color: var(--blue); }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 100;
  background: #fff;
  padding: 10px 14px;
}
.skip-link:focus { left: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(223,228,234,.8);
}
.nav-wrap {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
  text-decoration: none;
  font-weight: 700;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--navy);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: .78rem;
}
.site-nav { display: flex; gap: 25px; align-items: center; }
.site-nav a { color: var(--ink); text-decoration: none; font-size: .94rem; font-weight: 600; }
.site-nav a:hover { color: var(--blue); }
.menu-button { display: none; }

.hero {
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 15%, rgba(23,92,211,.14), transparent 26rem),
    linear-gradient(135deg, #f9fbff, #eef3f9);
  padding: 95px 0 80px;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(300px, .75fr);
  gap: 70px;
  align-items: center;
}
.eyebrow, .section-label {
  color: var(--blue);
  font-size: .76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
}
h1, h2, h3 { color: var(--navy); }
h1, h2 {
  font-family: "Libre Baskerville", Georgia, serif;
  line-height: 1.18;
}
h1 { font-size: clamp(3rem, 7vw, 5.6rem); margin: 12px 0 18px; letter-spacing: -.04em; }
h2 { font-size: clamp(2rem, 4vw, 3.15rem); margin: 8px 0 24px; letter-spacing: -.025em; }
h3 { line-height: 1.35; }
.hero-subtitle { max-width: 750px; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.3rem); }

.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 11px 20px;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}
.button.primary { color: #fff; background: var(--blue); }
.button.primary:hover { background: #0f4eb9; }
.button.secondary { color: var(--navy); background: #fff; border-color: var(--line); }
.button.secondary:hover { border-color: var(--blue); }

.profile-card {
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.9);
  border-radius: 18px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.monogram {
  width: 104px;
  height: 104px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 22px;
  color: #fff;
  background: linear-gradient(145deg, var(--navy), var(--blue));
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.65rem;
}
.profile-card h2 { font-size: 1.45rem; margin: 0 0 8px; }
.profile-card > p { color: var(--muted); }
.profile-card dl { margin: 28px 0 0; }
.profile-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}
.profile-card dt { color: var(--muted); }
.profile-card dd { margin: 0; color: var(--navy); font-weight: 700; }

.highlights { padding: 30px 0; background: #fff; }
.card-grid { display: grid; gap: 20px; }
.card-grid.four { grid-template-columns: repeat(4, 1fr); }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.stat-card {
  border-left: 3px solid var(--gold);
  padding: 12px 16px;
}
.stat { display: block; color: var(--navy); font-family: "Libre Baskerville", Georgia, serif; font-size: 1.35rem; font-weight: 700; }
.stat-card p { margin: 5px 0 0; color: var(--muted); font-size: .92rem; }

.section { padding: 100px 0; }
.section-muted { background: var(--soft); }
.two-column { display: grid; grid-template-columns: .8fr 1.4fr; gap: 80px; }
.prose { font-size: 1.08rem; color: var(--muted); }
.prose p:first-child { margin-top: 0; }

.topic-card, .detail-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.topic-card:hover, .detail-card:hover { transform: translateY(-3px); box-shadow: 0 15px 35px rgba(18,42,66,.08); }
.topic-card h3, .detail-card h3 { margin-top: 0; }
.topic-card p, .detail-card p { color: var(--muted); margin-bottom: 0; }

.timeline { max-width: 920px; }
.timeline article {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 34px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
}
.timeline-date { color: var(--blue); font-weight: 700; }
.timeline h3 { margin: 0 0 8px; font-size: 1.25rem; }
.timeline p { margin: 0; color: var(--muted); }

.publication-list { border-top: 1px solid var(--line); }
.publication-list article {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.pub-year { margin: 0; color: var(--blue); font-weight: 700; }
.publication-list h3 { margin: 0 0 9px; font-size: 1.15rem; }
.publication-list article p:last-child { color: var(--muted); margin-bottom: 0; }
.section-action { margin-top: 28px; font-weight: 700; }

.contact-section { background: var(--navy); color: #fff; }
.contact-section h2, .contact-section h3 { color: #fff; }
.contact-section .section-label { color: #8bb8ff; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.contact-card { background: rgba(255,255,255,.08); padding: 34px; border: 1px solid rgba(255,255,255,.15); border-radius: 16px; }
.contact-card p { color: #d4deea; }

.site-footer { background: #091b2d; color: #bac7d6; padding: 24px 0; font-size: .9rem; }
.footer-wrap { display: flex; justify-content: space-between; gap: 20px; }
.footer-wrap p { margin: 0; }

@media (max-width: 900px) {
  .menu-button {
    display: inline-flex;
    padding: 8px 12px;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 6px;
    font-weight: 700;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    padding: 18px 20px 22px;
    flex-direction: column;
    align-items: flex-start;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 14px 25px rgba(18,42,66,.1);
  }
  .site-nav.open { display: flex; }
  .hero-grid, .two-column, .contact-grid { grid-template-columns: 1fr; gap: 42px; }
  .card-grid.four, .card-grid.three { grid-template-columns: repeat(2, 1fr); }
  .hero { padding-top: 70px; }
}

@media (max-width: 580px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 72px 0; }
  .card-grid.four, .card-grid.three { grid-template-columns: 1fr; }
  .timeline article, .publication-list article { grid-template-columns: 1fr; gap: 8px; }
  .footer-wrap { flex-direction: column; }
  h1 { font-size: 3rem; }
}