:root {
  --background: #ffffff;
  --surface: #f7f8fa;
  --text: #17202a;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #175cd3;
  --accent-dark: #15469c;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  width: 100%;
  min-height: 4.25rem;
  padding: 0.8rem max(1.25rem, calc((100vw - var(--max-width)) / 2));
  border-bottom: 1px solid rgba(228, 231, 236, 0.9);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.nav-name {
  flex: 0 0 auto;
  color: var(--text);
  font-weight: 720;
  letter-spacing: -0.02em;
}

.nav-name:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: clamp(0.8rem, 2vw, 1.5rem);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

main,
footer {
  width: min(calc(100% - 2.5rem), var(--max-width));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 4.5rem);
  min-height: 33rem;
  padding: clamp(4rem, 9vw, 7rem) 0;
}

.portrait {
  width: 180px;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
  filter: saturate(0.9);
}

.eyebrow,
.section-heading > p {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.8rem;
  font-size: clamp(2.75rem, 7vw, 5.2rem);
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.intro {
  max-width: 44rem;
  margin-bottom: 0.9rem;
  color: #344054;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  line-height: 1.55;
}

.location {
  margin-bottom: 1.6rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.location i,
.contact-links i {
  margin-right: 0.38rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1.25rem;
}

.contact-links a {
  color: #344054;
  font-size: 0.92rem;
  font-weight: 650;
}

.contact-links .primary-link {
  padding: 0.55rem 0.9rem;
  border-radius: 0.45rem;
  background: var(--text);
  color: white;
}

.contact-links .primary-link:hover {
  background: var(--accent);
  text-decoration: none;
}

section {
  display: grid;
  grid-template-columns: minmax(140px, 0.28fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  padding: clamp(3.75rem, 8vw, 6.5rem) 0;
  border-top: 1px solid var(--line);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.lead {
  max-width: 48rem;
  margin-bottom: 1.75rem;
  color: #344054;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag-list span {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #475467;
  font-size: 0.82rem;
  font-weight: 600;
}

.publication-list,
.timeline {
  display: grid;
  gap: 1.15rem;
}

.publication,
.timeline article {
  padding: clamp(1.2rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}

.publication.featured {
  border-color: #b2ccff;
  background: #f5f8ff;
}

.publication-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.publication-meta span {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.publication-meta span + span::before {
  content: "·";
  margin-right: 0.5rem;
  color: #98a2b3;
}

.publication h3,
.timeline h3,
.skill-grid h3,
.compact-grid h3 {
  margin-bottom: 0.45rem;
  font-size: 1.06rem;
  letter-spacing: -0.015em;
  line-height: 1.4;
}

.publication h3 a {
  color: var(--text);
}

.publication p,
.timeline p,
.skill-grid p,
.compact-grid p {
  margin-bottom: 0.7rem;
  color: #475467;
  font-size: 0.94rem;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.9rem;
}

.paper-links a {
  font-size: 0.86rem;
  font-weight: 700;
}

.item-header {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}

.item-role {
  margin-bottom: 0.15rem !important;
  color: var(--text) !important;
  font-weight: 650;
}

.item-date {
  flex: 0 0 auto;
  color: var(--accent) !important;
  font-size: 0.8rem !important;
  font-weight: 750;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.muted {
  color: var(--muted) !important;
  font-size: 0.86rem !important;
}

ul {
  margin: 0.8rem 0 0;
  padding-left: 1.2rem;
  color: #475467;
}

li {
  margin-bottom: 0.4rem;
  padding-left: 0.15rem;
}

.skill-grid,
.compact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.skill-grid article,
.compact-grid article {
  padding: 1.25rem;
  border-radius: 0.65rem;
  background: var(--surface);
}

.skill-grid p,
.compact-grid p {
  margin-bottom: 0;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2.5rem 0 4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

footer p {
  margin: 0;
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 7rem;
  }

  .site-nav {
    display: block;
    padding-block: 0.7rem;
  }

  .nav-name {
    display: block;
    margin-bottom: 0.4rem;
  }

  .nav-links {
    margin-inline: -1.25rem;
    padding-inline: 1.25rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    min-height: auto;
    padding: 4rem 0;
  }

  .portrait {
    width: 130px;
  }

  section {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding: 3.5rem 0;
  }

  .section-heading {
    max-width: 22rem;
  }
}

@media (max-width: 520px) {
  main,
  footer {
    width: min(calc(100% - 2rem), var(--max-width));
  }

  h1 {
    font-size: clamp(2.6rem, 15vw, 3.75rem);
  }

  .contact-links {
    gap: 0.65rem 1rem;
  }

  .item-header {
    display: block;
  }

  .skill-grid,
  .compact-grid {
    grid-template-columns: 1fr;
  }

  .publication,
  .timeline article {
    border-radius: 0.6rem;
  }

  footer {
    display: block;
  }

  footer a {
    display: inline-block;
    margin-top: 0.5rem;
  }
}

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