:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #1d2630;
  --muted: #596676;
  --line: #d9dee6;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --accent-soft: #e4f2ef;
  --link: #165d9c;
  --shadow: 0 16px 36px rgba(32, 43, 54, 0.08);
  --max-width: 1060px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--link);
  text-decoration: none;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.55rem 0.75rem;
  color: #fff;
  background: var(--accent-dark);
  border-radius: 4px;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 248, 250, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max-width), calc(100% - 2rem));
  min-height: 64px;
  margin: 0 auto;
  gap: 1.5rem;
}

.brand {
  color: var(--ink);
  font-size: 1.02rem;
  font-weight: 700;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1rem;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--ink);
}

.page-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

.profile {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 2.25rem;
  align-items: center;
  padding: 2rem 0 2.25rem;
  border-bottom: 1px solid var(--line);
}

.profile-photo {
  width: 220px;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.profile-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2.15rem, 6vw, 3.25rem);
  font-weight: 750;
}

h2 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 1.38rem;
}

h2::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--line);
}

h3 {
  margin-bottom: 0.35rem;
  font-size: 1.03rem;
}

.subtitle {
  max-width: 680px;
  margin: 0.5rem 0 1.2rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
  margin: 0;
  padding: 0;
  color: var(--muted);
  list-style: none;
}

.contact-list li {
  display: inline-flex;
  align-items: center;
  min-height: 1.5rem;
}

.contact-list li + li::before {
  content: "";
  width: 4px;
  height: 4px;
  margin-right: 1rem;
  background: var(--line);
  border-radius: 50%;
}

.section {
  padding: 2rem 0 0;
}

.section p {
  max-width: 920px;
  margin: 0.7rem 0 0;
}

.news-list,
.timeline,
.compact-list {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-list li,
.timeline li,
.compact-list li {
  padding-left: 1rem;
  border-left: 3px solid var(--line);
}

.news-list time,
.timeline-date {
  display: inline-block;
  min-width: 8rem;
  color: var(--accent-dark);
  font-weight: 700;
}

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

.research-grid article {
  min-height: 170px;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.research-grid p {
  margin-top: 0.45rem;
  color: var(--muted);
}

.publication-list {
  display: grid;
  gap: 1.15rem;
  margin: 0;
  padding-left: 1.25rem;
}

.publication-list li {
  padding-left: 0.25rem;
}

.venue {
  display: inline-block;
  margin-bottom: 0.35rem;
  padding: 0.12rem 0.42rem;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: 1px solid #c6e2db;
  border-radius: 4px;
  font-size: 0.84rem;
  font-weight: 700;
}

.paper-title,
.authors,
.paper-meta {
  margin: 0.15rem 0;
}

.paper-title {
  font-weight: 700;
}

.authors,
.paper-meta {
  color: var(--muted);
}

.site-footer {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .site-header {
    position: static;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.85rem 0;
    gap: 0.55rem;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .page-shell {
    padding-top: 1.2rem;
  }

  .profile {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    padding-top: 1.2rem;
  }

  .profile-photo {
    width: min(190px, 65vw);
  }

  h1 {
    font-size: 2.25rem;
  }

  .contact-list {
    display: grid;
    gap: 0.3rem;
  }

  .contact-list li + li::before {
    display: none;
  }

  .research-grid {
    grid-template-columns: 1fr;
  }

  .news-list time,
  .timeline-date {
    display: block;
    min-width: 0;
  }
}