*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #0f172a;
  background: #f8fafc;
  line-height: 1.7;
}

a {
  color: #0f62fe;
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  background: radial-gradient(circle at top left, #e0e7ff, #ddeeff 65%, #f8fafc);
  padding: 1.5rem 0 4rem;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #0f172a;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-weight: 500;
  color: #0f172a;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #0f172a;
  display: block;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
  margin-top: 3rem;
}

.hero-media {
  display: grid;
  gap: 1.75rem;
  align-items: start;
}

.portrait {
  margin: 0;
}

.portrait img {
  width: 100%;
  border-radius: 22px;
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.18);
  object-fit: cover;
}

.portrait figcaption {
  font-size: 0.65rem;
  margin-top: 0.35rem;
  color: #94a3b8;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-text h1 {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  margin-bottom: 1rem;
}

.hero-sub {
  margin: 0 0 1rem;
  color: #1e293b;
  max-width: 60ch;
}

.lead {
  font-size: 1.1rem;
  max-width: 38ch;
  margin-bottom: 1.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  margin-bottom: 1rem;
  color: #475569;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 2px solid transparent;
}

.btn.primary {
  background: #0f62fe;
  color: #fff;
}

.btn.secondary {
  border-color: #0f62fe;
  color: #0f62fe;
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
  box-shadow: 0 12px 22px rgba(15, 98, 254, 0.15);
}

.hero-card {
  background: #fff;
  padding: 2rem;
  border-radius: 24px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

.hero-card h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.hero-card ul {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.hero-links {
  margin-top: 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section.alt {
  background: #eef2ff;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.25rem;
}

.section-intro {
  max-width: 65ch;
  color: #475569;
  margin-bottom: 2.5rem;
}

.section-grid {
  display: grid;
  gap: 3rem;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  align-items: start;
}

.profile-card {
  background: #fff;
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.07);
}

.profile-card h3 {
  margin-top: 0;
}

.profile-card dl {
  margin: 0;
}

.profile-card dt {
  font-weight: 600;
  margin-top: 1rem;
  color: #334155;
}

.profile-card dd {
  margin: 0.25rem 0 0;
  color: #475569;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.profile-links a {
  padding: 0.5rem 1rem;
  background: #0f172a;
  color: #fff;
  border-radius: 999px;
  font-size: 0.9rem;
}

.profile-card .profile-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.profile-card .profile-links a {
  text-align: center;
}

.highlight {
  color: #0f62fe;
  font-weight: 600;
}

.subheading {
  font-size: 1.35rem;
  margin: 2.5rem 0 0.75rem;
  color: #0f172a;
}

.expertise-grid {
  margin-top: 1rem;
}

.note {
  background: rgba(15, 98, 254, 0.08);
  padding: 1rem 1.25rem;
  border-left: 3px solid #0f62fe;
  border-radius: 12px;
  color: #1e293b;
}

.research-grid,
.project-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: #fff;
  padding: 1.75rem;
  border-radius: 18px;
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1);
}

.card h3 {
  margin-top: 0;
}

.timeline {
  display: grid;
  gap: 2.5rem;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0;
  height: 100%;
  width: 2px;
  background: linear-gradient(#0f62fe, rgba(15, 98, 254, 0.15));
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.75rem;
  position: relative;
  padding-left: 1.5rem;
}

.timeline-year {
  font-weight: 700;
  color: #0f62fe;
  letter-spacing: 0.08em;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -0.06rem;
  top: 0.4rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #0f62fe;
  box-shadow: 0 0 0 6px rgba(15, 98, 254, 0.15);
}

.timeline .meta {
  margin: 0.25rem 0;
  color: #334155;
}

.timeline .authors {
  margin: 0.25rem 0 0.75rem;
  font-style: italic;
  color: #475569;
}


.project a {
  font-weight: 600;
}

.highlight-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.research-honors {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 1.5rem;
}

.honors-wrapper {
  background: #eef2ff;
  padding: 2.5rem 2rem 2rem;
  margin: -1.5rem -2rem 0;
  border-radius: 20px;
}

.publication-timeline {
  position: relative;
  margin-bottom: 2.5rem;
}

.publication-timeline::before {
  height: 100%;
}

.publication-timeline::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  bottom: 0;
  width: 2px;
  height: 28px;
  background: #eef2ff;
}

.contact-card {
  background: #fff;
  padding: 3rem;
  border-radius: 24px;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 2.5rem;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  align-items: center;
}

.contact-email {
  display: inline-block;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.contact-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer {
  background: #0f172a;
  color: #e2e8f0;
  padding: 2.5rem 0;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: #93c5fd;
}

.small {
  font-size: 0.9rem;
  color: #94a3b8;
}

.solutions-wrapper {
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  margin-top: 2rem;
}

.solutions-column {
  background: #eef2ff;
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
}

.org-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-media {
    margin-top: 2.5rem;
  }

  .section-grid,
  .contact-card,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 0;
  }

  .timeline-item {
    padding-left: 2rem;
  }

  .profile-card {
    margin-top: 2rem;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    inset: 70px 0 auto;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 2rem 1.5rem;
    border-radius: 16px;
    width: calc(100% - 2rem);
    margin: 0 auto;
    display: none;
    box-shadow: 0 18px 32px rgba(15, 23, 42, 0.1);
  }

  .nav-links.open {
    display: flex;
  }

  .site-header {
    padding-bottom: 3rem;
  }

  .hero-card {
    padding: 1.5rem;
  }

  .contact-card {
    padding: 2rem;
  }

  .profile-card .profile-links {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}