:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5c677d;
  --line: #dfe5ef;
  --accent: #2457d6;
  --accent-dark: #193f9e;
  --accent-soft: #eaf0ff;
  --max: 1120px;
  --radius: 18px;
  --shadow: 0 12px 34px rgba(25, 45, 85, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }

.container { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; }

.skip-link {
  position: absolute; left: -999px; top: 0; padding: .6rem .9rem;
  background: var(--text); color: #fff; z-index: 9999;
}
.skip-link:focus { left: .75rem; top: .75rem; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247,249,252,.92);
  border-bottom: 1px solid rgba(223,229,239,.9);
  backdrop-filter: blur(12px);
}
.nav { min-height: 68px; display: flex; align-items: center; gap: 1.2rem; }
.brand { color: var(--text); font-weight: 800; letter-spacing: -.02em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a { color: #34415a; font-size: .94rem; font-weight: 650; }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: .18rem; background: var(--surface); }
.lang a { padding: .28rem .55rem; border-radius: 999px; font-size: .82rem; }
.lang a.active { background: var(--text); color: #fff; }

.hero { padding: 6rem 0 4.8rem; }
.hero-grid { display: grid; grid-template-columns: 1fr 260px; gap: 4rem; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 750; text-transform: uppercase; letter-spacing: .08em; font-size: .82rem; }
h1 { margin: .5rem 0 .7rem; font-size: clamp(2.6rem, 6vw, 5.25rem); line-height: .98; letter-spacing: -.055em; }
.lead { max-width: 800px; font-size: clamp(1.12rem, 2.1vw, 1.35rem); color: #35425a; margin: 1rem 0; }
.affiliations { color: var(--muted); max-width: 800px; }
.actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.8rem; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: .62rem .92rem; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text); font-weight: 700;
}
.button:hover { text-decoration: none; border-color: #bcc8de; }
.button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.button.primary:hover { background: var(--accent-dark); }
.avatar-wrap { display: flex; justify-content: center; }
.avatar { width: 230px; height: 230px; border-radius: 50%; border: 8px solid #fff; box-shadow: var(--shadow); object-fit: cover; background: #dfe7fb; }

section { padding: 4.2rem 0; scroll-margin-top: 78px; }
section.alt { background: #eef3fb; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: 220px 1fr; gap: 2.5rem; margin-bottom: 2rem; }
.section-kicker { margin: 0; font-size: .86rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); font-weight: 800; }
h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.8rem); letter-spacing: -.035em; line-height: 1.1; }
h3 { margin: 0 0 .45rem; line-height: 1.3; font-size: 1.12rem; }
p { margin: .35rem 0 1rem; }
.muted { color: var(--muted); }

.about-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 3rem; }
.quick-facts { border-left: 3px solid var(--accent); padding-left: 1.25rem; }
.quick-facts p { margin: 0 0 .8rem; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.35rem; box-shadow: 0 5px 18px rgba(25,45,85,.035);
}
.card p { color: var(--muted); font-size: .96rem; }
.card .more { font-weight: 750; font-size: .92rem; }
.tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .9rem; }
.tag { background: var(--accent-soft); color: #294b9f; border-radius: 999px; padding: .25rem .55rem; font-size: .76rem; font-weight: 700; }

.timeline { display: grid; gap: 0; }
.timeline-item { display: grid; grid-template-columns: 165px 1fr; gap: 1.4rem; padding: 1.2rem 0; border-top: 1px solid var(--line); }
.timeline-item:first-child { border-top: 0; padding-top: 0; }
.date { color: var(--muted); font-variant-numeric: tabular-nums; font-size: .92rem; }
.role { font-weight: 800; }
.org { color: var(--muted); }

.publication-list { display: grid; gap: .15rem; }
.pub { display: grid; grid-template-columns: 72px 1fr; gap: 1rem; padding: 1rem 0; border-top: 1px solid var(--line); }
.pub:first-child { border-top: 0; }
.pub-year { color: var(--accent); font-weight: 850; }
.pub-title { font-weight: 760; color: var(--text); }
.pub-title:hover { color: var(--accent); }
.pub-meta { color: var(--muted); font-size: .92rem; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 2.8rem; }
.clean-list { margin: .7rem 0; padding-left: 1.2rem; }
.clean-list li { margin: .45rem 0; }

.contact-card { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: center; background: var(--text); color: #fff; padding: 2rem; border-radius: var(--radius); }
.contact-card h2 { color: #fff; }
.contact-card p { color: #cad3e4; max-width: 700px; }
.contact-card a { color: #fff; }
.contact-links { display: grid; gap: .5rem; justify-items: start; }

footer { padding: 2.2rem 0 3rem; color: var(--muted); font-size: .9rem; }
.footer-row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.2rem; }
  .avatar-wrap { justify-content: flex-start; order: -1; }
  .avatar { width: 150px; height: 150px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .section-head { grid-template-columns: 1fr; gap: .5rem; }
  .about-grid, .two-col { grid-template-columns: 1fr; gap: 1.4rem; }
}

@media (max-width: 680px) {
  .nav { align-items: flex-start; padding: .8rem 0; }
  .nav-links { gap: .55rem .8rem; }
  .nav-links a.section-link { display: none; }
  .hero { padding: 3.8rem 0 3.2rem; }
  .card-grid { grid-template-columns: 1fr; }
  .timeline-item, .pub { grid-template-columns: 1fr; gap: .2rem; }
  .contact-card { grid-template-columns: 1fr; }
  section { padding: 3.2rem 0; }
}

@media print {
  .site-header, .actions, footer { display: none !important; }
  body { background: white; }
  section, .hero { padding: 1.2rem 0; }
  .card { box-shadow: none; break-inside: avoid; }
}