:root {
  color-scheme: light;
  --bg: #f5f7f9;
  --surface: #ffffff;
  --surface-2: #eef3f5;
  --ink: #101820;
  --muted: #5d6873;
  --line: #d9e1e8;
  --accent: #006c67;
  --accent-dark: #004f4b;
  --warm: #425168;
  --gold: #6c5a2d;
  --shadow: 0 22px 64px rgba(16, 24, 32, 0.1);
  --radius: 8px;
  --content: min(1160px, calc(100vw - 40px));
  --font-body: Aptos, "Segoe UI", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: Cambria, Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(180deg, #ffffff 0, var(--bg) 540px),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.66;
  letter-spacing: 0;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

button {
  font: inherit;
}

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

.skip-link:focus {
  z-index: 20;
  width: auto;
  height: auto;
  clip: auto;
  left: 18px;
  top: 18px;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: var(--content);
  margin: 14px auto 0;
  padding: 12px;
  border: 1px solid rgba(217, 225, 232, 0.9);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  transition: box-shadow 160ms ease, border-color 160ms ease;
}

.site-header.is-scrolled {
  border-color: rgba(0, 108, 103, 0.25);
  box-shadow: 0 14px 42px rgba(16, 24, 32, 0.09);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 690;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 7px;
  background: #0d1b2a;
  color: #fff;
  font-family: var(--font-body);
  font-weight: 760;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 24px);
}

.site-nav a {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 690;
  letter-spacing: 0;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--accent);
}

.menu-toggle {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  width: var(--content);
  margin: 0 auto;
  padding: clamp(58px, 8vw, 108px) 0 clamp(50px, 7vw, 84px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.62fr);
  gap: clamp(36px, 7vw, 86px);
  align-items: center;
}

.hero-copy,
.portrait-panel {
  min-width: 0;
}

.eyebrow,
.section-label,
.content-card span,
.publication-list span {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 650;
  max-width: 760px;
  margin: 14px 0 20px;
  font-size: clamp(3.05rem, 6.4vw, 6.4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
}

.intro {
  max-width: 720px;
  margin: 0;
  color: #2d3a45;
  font-size: clamp(1.04rem, 1.55vw, 1.2rem);
  line-height: 1.74;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 7px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 28px rgba(0, 108, 103, 0.18);
}

.portrait-panel {
  position: relative;
}

.portrait-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.portrait-frame img {
  width: 100%;
  aspect-ratio: 1 / 1.04;
  object-fit: cover;
}

.portrait-caption {
  display: grid;
  gap: 2px;
  margin: -54px 20px 0;
  padding: 18px;
  border: 1px solid rgba(217, 225, 232, 0.95);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 46px rgba(29, 35, 31, 0.12);
}

.portrait-caption span {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.portrait-caption strong {
  font-family: var(--font-display);
  font-weight: 650;
  color: #152433;
  font-size: 1.08rem;
}

.stat-strip {
  display: grid;
  width: var(--content);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.stat-strip {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.stat-strip article {
  padding: 24px;
  background: var(--surface);
}

.stat-strip strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 650;
  color: var(--accent);
  font-size: clamp(1.95rem, 3.6vw, 3.35rem);
  line-height: 0.95;
}

.stat-strip span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-weight: 650;
}

.section {
  width: var(--content);
  margin: 0 auto;
  padding: clamp(72px, 9vw, 116px) 0;
  border-bottom: 1px solid var(--line);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(150px, 0.34fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 72px);
}

.split-section h2,
.section-top h2 {
  font-family: var(--font-display);
  font-weight: 650;
  margin: 0;
  max-width: 880px;
  font-size: clamp(2rem, 4.5vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.split-section p {
  max-width: 790px;
  margin: 22px 0 0;
  color: #2d3a45;
  font-size: 1.08rem;
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.research-tags span {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 650;
}

.section-top {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 28px;
}

.section-top .section-label {
  margin: 0 0 10px;
}

.text-link {
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
}

.timeline {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 28px;
  padding: 24px;
  background: var(--surface);
}

.timeline-item time,
.degree-grid time {
  color: var(--warm);
  font-weight: 700;
}

.timeline-item h3,
.degree-grid h3,
.content-card h3,
.publication-list h3 {
  font-family: var(--font-display);
  font-weight: 650;
  margin: 0;
  line-height: 1.28;
  letter-spacing: 0;
}

.timeline-item p,
.degree-grid p,
.content-card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.degree-grid,
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.degree-grid article,
.content-card {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 16px 44px rgba(29, 35, 31, 0.07);
}

.degree-grid span {
  display: block;
  margin-top: 14px;
  color: #2d3a45;
  font-size: 0.94rem;
}

.card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-card span,
.publication-list span {
  color: var(--gold);
}

.publication-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 6vw, 70px);
}

.publication-summary {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.publication-summary p {
  margin: 0;
  color: #2d3a45;
}

.publication-summary dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 0;
}

.publication-summary dl div {
  padding: 14px;
  border-radius: 7px;
  background: var(--surface);
}

.publication-summary dt {
  color: var(--muted);
  font-size: 0.82rem;
}

.publication-summary dd {
  margin: 4px 0 0;
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 1.8rem;
  font-weight: 650;
  line-height: 1;
}

.publication-list {
  display: grid;
  gap: 12px;
}

.publication-list article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.publication-list a {
  display: inline-flex;
  margin-top: 10px;
  color: var(--accent);
  font-weight: 700;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: var(--content);
  margin: 0 auto;
  padding: 0 0 34px;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

@media (max-width: 960px) {
  :root {
    --content: min(760px, calc(100vw - 28px));
  }

  .site-header {
    position: sticky;
    align-items: flex-start;
    flex-wrap: wrap;
    min-height: 70px;
    padding-right: 64px;
  }

  .menu-toggle {
    position: absolute;
    top: 14px;
    right: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-color: var(--ink);
    background: var(--ink);
  }

  .menu-toggle span:not(.sr-only) {
    background: #fff;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 8px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 4px;
    border-top: 1px solid var(--line);
  }

  .hero-grid,
  .split-section,
  .publication-layout {
    grid-template-columns: 1fr;
  }

  .portrait-panel {
    max-width: 440px;
  }

  .stat-strip,
  .degree-grid,
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .site-header,
  .hero,
  .stat-strip,
  .section,
  .site-footer {
    width: auto;
    margin-left: 14px;
    margin-right: 14px;
  }

  .brand-name {
    display: none;
  }

  .hero {
    padding-top: 42px;
  }

  .hero-grid,
  .portrait-panel {
    width: 100%;
    max-width: 330px;
  }

  .hero-copy {
    width: 100%;
    max-width: 300px;
  }

  .hero h1 {
    width: 100%;
    font-size: clamp(2.75rem, 12vw, 3.25rem);
    overflow-wrap: anywhere;
  }

  .intro {
    width: 100%;
    max-width: 100%;
    font-size: 1rem;
    overflow-wrap: break-word;
  }

  .stat-strip,
  .degree-grid,
  .card-grid,
  .publication-summary dl,
  .language-strip {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .section-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}