:root {
  --text: #1f2933;
  --muted: #667085;
  --line: #e5e7eb;
  --panel: #f7f8fa;
  --link: #2557a7;
  --accent: #2b6cb0;
  --accent-soft: #eef5ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav,
.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 24px;
}

.brand {
  color: #111827;
  font-family: Montserrat, Roboto, sans-serif;
  font-size: 20px;
  font-weight: 700;
}

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

.nav-links a {
  color: #374151;
  font-size: 15px;
  font-weight: 500;
}

.section {
  padding: 38px 0;
}

.about-section {
  padding-top: 48px;
}

.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 56px;
  align-items: start;
}

.profile {
  text-align: center;
}

.avatar {
  display: block;
  width: 188px;
  height: 188px;
  margin: 0 auto 22px;
  border-radius: 50%;
  border: 8px solid #f0f2f5;
  object-fit: cover;
  object-position: center 26%;
}

.profile h1 {
  margin: 0 0 8px;
  font-family: Montserrat, Roboto, sans-serif;
  font-size: 28px;
  line-height: 1.2;
}

.role,
.affiliation {
  margin: 2px 0;
  color: var(--muted);
}

.profile-links {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.profile-links a {
  padding: 6px 9px;
  color: var(--link);
  font-weight: 700;
}

.bio {
  max-width: 780px;
  padding-top: 2px;
}

.bio p {
  margin: 0 0 18px;
}

.info-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-top: 28px;
}

.info-columns h2,
.section-title {
  margin: 0 0 12px;
  font-family: Montserrat, Roboto, sans-serif;
  font-size: 22px;
  line-height: 1.25;
}

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

.plain-list li {
  margin: 0 0 10px;
  color: var(--muted);
}

.plain-list strong,
.plain-list span {
  display: block;
}

.plain-list strong {
  color: var(--text);
}

.stats-section {
  padding: 20px 0;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stats-grid div {
  padding: 12px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.stat-value,
.stat-label {
  display: block;
}

.stat-value {
  color: var(--accent);
  font-family: Montserrat, Roboto, sans-serif;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

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

.publication {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 22px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.publication:first-child {
  padding-top: 6px;
}

.thumb {
  display: grid;
  place-items: center;
  width: 230px;
  height: 138px;
  overflow: hidden;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid #d8e6f8;
  border-radius: 8px;
  font-family: Montserrat, Roboto, sans-serif;
  font-weight: 700;
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.pub-body h3 {
  margin: 0 0 6px;
  color: #143b76;
  font-size: 20px;
  line-height: 1.3;
  font-weight: 500;
}

.featured .pub-body h3 {
  font-weight: 700;
}

.authors,
.venue,
.meta,
.resources {
  margin: 3px 0;
  color: var(--muted);
}

.authors strong {
  color: var(--text);
}

.venue {
  color: #6b7280;
}

.highlight {
  color: #d11a2a;
}

.meta {
  color: var(--accent);
  font-weight: 700;
}

.footer {
  padding: 28px 0 42px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .nav,
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-links {
    gap: 14px;
  }

  .about-grid,
  .info-columns,
  .stats-grid,
  .publication {
    grid-template-columns: 1fr;
  }

  .about-grid {
    gap: 30px;
  }

  .thumb {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }
}