:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #111827;
  --muted: #5f6b7a;
  --line: #e5e7eb;
  --accent: #174ea6;
  --accent-soft: #e8f0fe;
  --shadow: 0 16px 45px rgba(17, 24, 39, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 8px;
  font-size: 0.93rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  padding: 8px 11px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: rgba(23, 78, 166, 0.15);
  text-decoration: none;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 74px 24px;
}

.section.compact {
  padding-top: 34px;
  padding-bottom: 34px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) 360px;
  gap: 48px;
  align-items: center;
  min-height: 64vh;
}

.page-hero {
  min-height: 34vh;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
}

h1,
h2,
h3 {
  line-height: 1.18;
  letter-spacing: -0.035em;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4.8vw, 3.9rem);
}

h2 {
  margin: 0;
  font-size: clamp(1.75rem, 3.2vw, 2.55rem);
}

h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.lead {
  max-width: 760px;
  font-size: 1.12rem;
  color: var(--muted);
  margin: 22px 0 0;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(17, 24, 39, 0.05);
}

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

.profile-card,
.card,
.publication,
.stat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.profile-card {
  padding: 30px;
}

.avatar {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 900;
  font-size: 1.8rem;
  margin-bottom: 24px;
}

.profile-card h2 {
  font-size: 1.55rem;
  margin-bottom: 8px;
}

.profile-card p {
  margin: 6px 0;
  color: var(--muted);
}

.profile-links {
  display: flex;
  gap: 12px;
  margin-top: 22px;
}

.section-heading {
  margin-bottom: 32px;
}

.section-intro {
  max-width: 800px;
  color: var(--muted);
  font-size: 1.03rem;
  margin-top: 12px;
}

.grid {
  display: grid;
  gap: 20px;
}

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

.grid.two {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  padding: 26px;
}

.card p,
.publication p,
.cv-grid li,
.contact p,
.timeline-item p,
.stat-card span {
  color: var(--muted);
}

.muted {
  max-width: none;
  background: #eef2f7;
}

.muted > * {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

.publication-list {
  display: grid;
  gap: 18px;
}

.publication {
  padding: 28px;
}

.publication.compact-publication {
  box-shadow: none;
  border-radius: 22px;
  padding: 24px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tags span {
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 6px 10px;
  font-size: 0.83rem;
  font-weight: 700;
}

.meta {
  font-size: 0.92rem;
  font-weight: 700;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat-grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.stat-card {
  padding: 22px;
}

.stat-card strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.stat-card span {
  display: block;
  font-size: 0.95rem;
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.timeline-year {
  color: var(--accent);
  font-weight: 900;
}

.cv-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 26px;
}

.cv-grid ul {
  padding-left: 20px;
}

.note {
  color: var(--muted);
  margin-top: 24px;
}

code {
  background: #e5e7eb;
  padding: 2px 6px;
  border-radius: 6px;
}

.profile-photo-card {
  overflow: hidden;
  padding: 0;
}

.profile-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  display: block;
}

.profile-caption {
  padding: 24px 26px 28px;
}

.profile-caption h2 {
  margin: 0 0 6px;
  font-size: 1.55rem;
}

.profile-caption p {
  margin: 4px 0;
  color: var(--muted);
}

.current-grid {
  grid-template-columns: repeat(4, 1fr);
}

.current-card strong {
  display: block;
  color: var(--accent);
  margin-bottom: 8px;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.project-grid {
  grid-template-columns: repeat(3, 1fr);
}

.contact-panel {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: start;
}

.contact-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.contact-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  background: var(--surface);
  font-weight: 700;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  text-align: center;
  color: var(--muted);
  background: var(--surface);
}

@media (max-width: 1060px) {
  .current-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 960px) {
  .stat-grid,
  .stat-grid.four {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero,
  .contact-panel,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .profile-photo-card {
    max-width: 460px;
  }
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .grid.three,
  .grid.two,
  .cv-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 58px 20px;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: clamp(2rem, 10vw, 2.65rem);
  }

  .stat-grid,
  .stat-grid.four,
  .current-grid {
    grid-template-columns: 1fr;
  }
}