:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --text: #152033;
  --muted: #5f6f83;
  --line: #dce3ec;
  --navy: #0b1f3a;
  --navy-2: #17385f;
  --accent: #1d5f8d;
  --accent-soft: #dfeef7;
  --shadow: 0 18px 55px rgba(11,31,58,.10);
  --radius: 22px;
  --max: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  background: radial-gradient(circle at 85% 0%, rgba(29,95,141,.11), transparent 30rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 999;
  padding: 10px 14px;
  background: #fff;
  color: var(--navy);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.skip:focus { top: 12px; }

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245,247,251,.86);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(220,227,236,.82);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
  font-weight: 780;
  letter-spacing: -.02em;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 12px;
  background: var(--navy);
  color: white;
  font-size: 13px;
  letter-spacing: .04em;
}

nav ul {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav a { color: var(--text); font-size: 14px; font-weight: 650; }

.nav-cta {
  padding: 10px 15px;
  border-radius: 8px;
  color: #fff !important;
  background: var(--navy);
  text-decoration: none !important;
}

.language-select {
  min-height: 38px;
  max-width: 118px;
  padding: 0 30px 0 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--navy);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.language-select:focus-visible,
.filter-btn:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(29,95,141,.35);
  outline-offset: 3px;
}

.hero { padding: 76px 0 42px; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: clamp(38px, 7vw, 90px);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid #cedae7;
  border-radius: 8px;
  background: rgba(255,255,255,.7);
  color: var(--navy-2);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--accent);
}

h1 {
  margin: 22px 0 18px;
  max-width: 850px;
  color: var(--navy);
  font-size: clamp(44px, 6vw, 78px);
  line-height: .98;
  letter-spacing: -.055em;
}

.lead {
  max-width: 780px;
  margin: 0;
  color: #405167;
  font-size: clamp(18px, 2.1vw, 23px);
  line-height: 1.55;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy);
  font-weight: 720;
  font-size: 14px;
  box-shadow: 0 6px 20px rgba(11,31,58,.04);
}

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

.portrait-wrap { position: relative; max-width: 390px; justify-self: end; }

.portrait-wrap::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid #c8d6e4;
  border-radius: 30px;
  z-index: -1;
}

.portrait {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  object-position: 50% 30%;
  border-radius: 28px;
  box-shadow: var(--shadow);
  background: #dfe4ea;
}

.portrait-caption { margin-top: 14px; color: var(--muted); font-size: 12px; text-align: right; }

.focus-strip {
  margin-top: 54px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255,255,255,.75);
}

.focus-item { padding: 20px; border-right: 1px solid var(--line); }
.focus-item:nth-child(4n) { border-right: 0; }
.focus-item:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
.focus-item strong { display: block; color: var(--navy); font-size: 15px; }
.focus-item span { display: block; margin-top: 3px; color: var(--muted); font-size: 13px; }

.social-item {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: background .18s ease, transform .18s ease;
}

.social-item:hover { background: var(--surface); transform: translateY(-2px); text-decoration: none; }

section { padding: 66px 0; }

.section-head {
  display: grid;
  grid-template-columns: .45fr 1fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 36px;
}

.section-kicker {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .11em;
}

h2 {
  margin: 7px 0 0;
  color: var(--navy);
  font-size: clamp(31px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: -.035em;
}

.section-intro { margin: 0; color: var(--muted); font-size: 17px; }
.about-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 14px 45px rgba(11,31,58,.055);
}

.about-card p:first-child { margin-top: 0; }
.about-card p:last-child { margin-bottom: 0; }

.timeline { display: grid; gap: 0; margin-top: 30px; }

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 125px 1fr;
  gap: 24px;
  padding: 0 0 28px 22px;
  margin-left: 7px;
  border-left: 1px solid #cbd6e2;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--bg);
}

.timeline-item:last-child { padding-bottom: 0; }
.timeline-year { color: var(--accent); font-size: 13px; font-weight: 800; }
.timeline-copy strong { display: block; color: var(--navy); margin-bottom: 3px; }
.timeline-copy span { color: var(--muted); font-size: 14px; }

.publications-tools {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.filters { display: flex; gap: 8px; flex-wrap: wrap; }

.filter-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
}

.filter-btn.active { border-color: var(--navy); background: var(--navy); color: #fff; }
.publication-list { display: grid; gap: 14px; }

.publication {
  display: grid;
  grid-template-columns: 82px 1fr auto;
  gap: 22px;
  align-items: start;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.publication:hover { transform: translateY(-2px); border-color: #c3d1df; box-shadow: 0 14px 40px rgba(11,31,58,.07); }
.publication[hidden] { display: none; }
.pub-year { color: var(--navy); font-size: 23px; font-weight: 820; letter-spacing: -.03em; }
.pub-title { margin: 0 0 7px; font-size: 17px; line-height: 1.35; }
.pub-title a, .pub-title span { color: var(--navy); font-weight: 790; }
.pub-authors, .pub-venue { margin: 0; color: var(--muted); font-size: 13.5px; }
.pub-venue { margin-top: 5px; }
.pub-links { display: flex; gap: 7px; flex-wrap: wrap; justify-content: flex-end; }

.tag-link {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--navy-2);
  font-size: 12px;
  font-weight: 760;
  white-space: nowrap;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  padding: clamp(28px, 5vw, 52px);
  border-radius: 26px;
  background: var(--navy);
  color: #dbe6f3;
}

.contact-panel h2 { color: #fff; max-width: 700px; margin-top: 0; }
.contact-panel p { max-width: 760px; margin-bottom: 0; color: #c5d3e3; }
.contact-panel .btn { border-color: rgba(255,255,255,.20); background: #fff; }
.contact-kicker { color: #8ebfe0; }

footer { padding: 34px 0 45px; color: var(--muted); font-size: 13px; }

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); }

noscript {
  display: block;
  padding: 1rem;
  background: #fff4d8;
  color: #5d4200;
  text-align: center;
}

@media (max-width: 1040px) {
  nav ul { gap: 13px; }
}

@media (max-width: 920px) {
  .hero-grid, .section-head, .about-card { grid-template-columns: 1fr; }
  .portrait-wrap { justify-self: start; width: min(100%, 330px); }
  .focus-strip { grid-template-columns: 1fr 1fr; }
  .focus-item { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .focus-item:nth-child(2n) { border-right: 0; }
  .focus-item:nth-last-child(-n+2) { border-bottom: 0; }
  .publication { grid-template-columns: 70px 1fr; }
  .pub-links { grid-column: 2; justify-content: flex-start; }
}

@media (max-width: 760px) {
  nav ul li { display: none; }
  nav ul .language-item { display: block; }
  .language-select { width: 112px; }
}

@media (max-width: 700px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .nav { gap: 8px; }
  .brand { gap: 10px; font-size: 15px; }
  .hero { padding-top: 44px; }
  h1 { font-size: clamp(40px, 13vw, 60px); }
  .focus-strip { grid-template-columns: 1fr; }
  .focus-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .focus-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
  .focus-item:last-child { border-bottom: 0; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .publication { grid-template-columns: 1fr; gap: 10px; }
  .pub-links { grid-column: auto; }
  .contact-panel { grid-template-columns: 1fr; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 380px) {
  .brand { font-size: 14px; }
  .brand-mark { width: 36px; height: 36px; }
  .language-select { width: 98px; padding-left: 8px; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}