* {
  box-sizing: border-box;
}

:root {
  --bg: #ffffff;
  --bg-alt: #f6f8fb;
  --text: #15202b;
  --muted: #5f6b76;
  --line: #d9e0e7;
  --accent: #183b63;
  --accent-2: #275f91;
  --card: #ffffff;
  --shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
  --radius: 18px;
  --max: 1160px;
}

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;
}

a {
  color: inherit;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid rgba(217, 224, 231, .8);
}

.nav-wrap {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -.02em;
}

.nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  font-size: .92rem;
  color: var(--muted);
  font-weight: 650;
}

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

.hero {
  padding: 92px 0 82px;
  background:
    radial-gradient(circle at 85% 15%, rgba(39,95,145,.12), transparent 32%),
    linear-gradient(180deg, #fbfdff 0%, #ffffff 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, .75fr);
  gap: 54px;
  align-items: center;
}

.eyebrow {
  color: var(--accent-2);
  font-size: .82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .13em;
  margin-bottom: 10px;
}

h1, h2, h3 {
  line-height: 1.15;
  letter-spacing: -.025em;
}

h1 {
  font-size: clamp(3.1rem, 8vw, 6.4rem);
  margin: 0 0 24px;
  max-width: 900px;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin: 0 0 18px;
}

h3 {
  font-size: 1.13rem;
  margin: 0 0 10px;
}

.hero-lead {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  max-width: 820px;
  margin: 0 0 18px;
}

.hero-copy {
  max-width: 780px;
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 17px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  text-decoration: none;
  font-weight: 750;
  font-size: .92rem;
}

.button:hover {
  border-color: var(--accent);
}

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

.profile-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.metric {
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.metric:first-child {
  padding-top: 0;
}

.metric:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.metric-kicker {
  display: block;
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: 6px;
}

.metric strong {
  display: block;
  font-size: 1.07rem;
}

.section {
  padding: 84px 0;
}

.section.alt {
  background: var(--bg-alt);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-heading p {
  color: var(--muted);
  margin: 0;
}

.cards {
  display: grid;
  gap: 18px;
}

.cards.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.skill-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.skill-strip span {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: .86rem;
  font-weight: 700;
}

.pub-list {
  display: grid;
  gap: 16px;
}

.publication {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.publication.featured {
  border-color: #b9c9d8;
  box-shadow: var(--shadow);
}

.pub-year {
  font-size: .85rem;
  font-weight: 850;
  color: var(--accent-2);
  letter-spacing: .06em;
}

.publication p {
  color: var(--muted);
  margin: 0 0 8px;
}

.venue {
  color: var(--text) !important;
  font-weight: 700;
}

.doi {
  display: inline-block;
  margin-top: 4px;
  color: var(--accent-2);
  font-size: .9rem;
  overflow-wrap: anywhere;
}

.more-publications {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.more-publications summary {
  cursor: pointer;
  font-weight: 800;
}

.more-grid {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.more-grid a {
  color: var(--accent-2);
}

.timeline {
  display: grid;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 26px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-date {
  color: var(--accent-2);
  font-weight: 800;
}

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

.timeline-item .venue {
  margin-bottom: 7px;
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px;
}

.clean-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.clean-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.contact-section {
  padding: 72px 0;
  background: #132a44;
  color: white;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 40px;
  align-items: center;
}

.contact-section .eyebrow {
  color: #a9cbe8;
}

.contact-section p {
  color: #d4deea;
  max-width: 760px;
}

.contact-section .button {
  border-color: rgba(255,255,255,.35);
  background: transparent;
  color: white;
}

.contact-section .button.primary {
  background: white;
  color: #132a44;
}

.footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: .88rem;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero-grid,
  .contact-inner,
  .two-col {
    grid-template-columns: 1fr;
  }

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

  .hero {
    padding-top: 70px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--max), calc(100% - 26px));
  }

  .cards.three,
  .publication,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .pub-year {
    margin-bottom: -8px;
  }

  .section {
    padding: 64px 0;
  }

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