:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-blue: #eef5ff;
  --text: #102033;
  --muted: #526173;
  --muted-strong: #334155;
  --line: #dce4ef;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --card: #ffffff;
  --shadow: 0 12px 28px rgba(15, 32, 51, 0.07);
  --radius: 8px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.62;
}

img {
  display: block;
  max-width: 100%;
}

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

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

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

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2rem, 4.2vw, 3.45rem);
  margin-bottom: 0.85rem;
}

h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  margin-bottom: 0.8rem;
}

h3 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}

p {
  color: var(--muted);
}

.container {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}

.narrow {
  max-width: 820px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(220, 228, 239, 0.9);
  box-shadow: 0 6px 18px rgba(15, 32, 51, 0.045);
  backdrop-filter: blur(10px);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--text);
  font-size: clamp(0.92rem, 1.15vw, 1.02rem);
  font-weight: 800;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover,
.brand:focus {
  color: var(--accent);
  text-decoration: none;
}

.brand-short {
  display: none;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  color: #ffffff;
  background: var(--accent);
  font-weight: 800;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-menu a {
  color: var(--muted-strong);
}

.nav-menu a:hover,
.nav-menu a:focus,
.nav-menu a.active {
  color: var(--accent);
}

.nav-button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.62rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

a:focus-visible,
button:focus-visible,
.button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.28);
  outline-offset: 3px;
}

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

.nav-menu .nav-button {
  color: #ffffff;
}

.nav-button:hover,
.nav-button:focus,
.button.primary:hover,
.button.primary:focus {
  color: #ffffff;
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  text-decoration: none;
}

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

.button.secondary:hover,
.button.secondary:focus {
  color: #ffffff;
  background: var(--accent);
  text-decoration: none;
}

.button.disabled {
  color: #64748b;
  background: #f8fafc;
  border-color: #dbe3ed;
  cursor: default;
  pointer-events: none;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.button-row.small {
  gap: 0.45rem;
}

.button-row.small .button {
  min-height: 34px;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
}

.hero {
  padding: 4.9rem 0 4.2rem;
  background: #ffffff;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  max-width: 720px;
  font-size: clamp(2.1rem, 4vw, 3.55rem);
  line-height: 1.06;
  text-wrap: balance;
}

.eyebrow,
.section-kicker {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.65rem;
}

.hero-tagline {
  color: var(--text);
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  font-weight: 700;
  margin-bottom: 0.85rem;
  text-wrap: balance;
}

.hero-summary {
  max-width: 650px;
  font-size: 1.08rem;
  margin-bottom: 1.55rem;
}

.hero-portrait {
  justify-self: center;
  width: min(100%, 300px);
  aspect-ratio: 1;
  border-radius: 18px;
  padding: 0.7rem;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.section,
.page-hero {
  padding: 4rem 0;
}

.page-hero {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

.page-hero .button {
  margin-top: 1rem;
}

.section-muted {
  background: var(--bg-soft);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 1.55rem;
}

.section-heading.split {
  max-width: none;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
}

.text-link {
  font-weight: 700;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 2.4rem;
  align-items: start;
}

.info-stack {
  display: grid;
  gap: 0.9rem;
}

.card,
.publication-card,
.publication-entry,
.cv-section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card {
  padding: 1.25rem;
}

.compact-card p,
.pillar-card p,
.publication-card p,
.contact-card p {
  margin-bottom: 0;
}

.card-grid {
  display: grid;
  gap: 1rem;
}

.card-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pillar-card {
  min-height: 220px;
}

.card-letter {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 0.95rem;
  border: 1px solid #cfddfa;
  border-radius: 50%;
  color: var(--accent-dark);
  background: #f5f8ff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1;
}

.visual-feature {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 2.5rem;
  align-items: center;
}

.research-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.research-figure img {
  width: 100%;
  aspect-ratio: 1692 / 859;
  background: #000000;
  object-fit: contain;
  object-position: center;
}

.research-figure figcaption {
  padding: 0.85rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.publication-preview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.publication-card {
  display: flex;
  min-height: 245px;
  flex-direction: column;
  padding: 1.25rem;
}

.publication-card .button-row {
  margin-top: auto;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
}

.tag,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  color: var(--accent);
  background: var(--bg-blue);
  font-size: 0.78rem;
  font-weight: 800;
}

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

.content-list {
  display: grid;
  gap: 1.45rem;
}

.content-block {
  max-width: 880px;
  padding-bottom: 0.2rem;
}

.content-block.callout {
  max-width: none;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--bg-blue);
  border: 1px solid #cfe0ff;
}

.timeline {
  display: grid;
  gap: 1.05rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 1.25rem;
}

.year {
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 800;
  padding-top: 1.1rem;
}

.publication-entry {
  padding: 1.25rem;
}

.publication-entry h2 {
  font-size: 1.35rem;
  margin-top: 0.8rem;
}

.cv-layout {
  display: grid;
  gap: 1rem;
}

.cv-section {
  padding: 1.25rem;
}

.cv-section h2 {
  font-size: 1.35rem;
  padding-bottom: 0.7rem;
  margin-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.cv-item {
  padding: 0.8rem 0;
}

.cv-item + .cv-item {
  border-top: 1px solid var(--line);
}

.placeholder {
  color: var(--muted);
}

.skill-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.contact-hero {
  text-align: center;
}

.contact-grid {
  max-width: 900px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.contact-card h2 {
  font-size: 1.2rem;
}

.contact-card.wide {
  grid-column: 1 / -1;
}

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-inner,
.footer-links {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.footer-inner {
  justify-content: space-between;
}

.footer-links {
  flex-wrap: wrap;
  justify-content: flex-end;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links > * + *::before {
  content: "\00b7";
  margin-right: 0.7rem;
  color: #94a3b8;
}

.footer-links a {
  color: var(--muted-strong);
}

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

.analytics-consent {
  width: min(calc(100% - 32px), 980px);
  margin: 16px auto 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 16px 42px rgba(15, 32, 51, 0.16);
}

.analytics-consent[hidden] {
  display: none;
}

.analytics-consent__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.25rem;
}

.analytics-consent__copy h2 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.analytics-consent__copy p {
  max-width: 640px;
  margin-bottom: 0;
  font-size: 0.9rem;
  line-height: 1.5;
}

.analytics-consent__actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.consent-button {
  min-width: 120px;
  color: var(--accent-dark);
  background: #ffffff;
  cursor: pointer;
  font: inherit;
  font-size: 0.86rem;
}

.consent-button:hover,
.consent-button:focus {
  color: #ffffff;
  background: var(--accent);
  text-decoration: none;
}

.analytics-notice {
  position: fixed;
  z-index: 60;
  top: 84px;
  right: 20px;
  max-width: min(360px, calc(100% - 40px));
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: #ffffff;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
}

@media (max-width: 880px) {
  .nav-toggle {
    display: block;
  }

  .brand-full {
    display: none;
  }

  .brand-short {
    display: inline-grid;
  }

  .nav-menu {
    position: absolute;
    top: 68px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu a {
    padding: 0.85rem 0.9rem;
    border-radius: 10px;
  }

  .nav-button {
    margin-top: 0.4rem;
  }

  .hero {
    padding: 3.3rem 0;
  }

  .hero-grid,
  .two-column,
  .visual-feature,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-summary {
    margin-left: auto;
    margin-right: auto;
  }

  .button-row {
    justify-content: center;
  }

  .hero-portrait {
    order: -1;
    width: min(72vw, 260px);
    border-radius: 18px;
  }

  .hero-portrait img {
    border-radius: 12px;
  }

  .card-grid.three,
  .publication-preview,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .publication-card {
    min-height: 0;
  }

  .section-heading.split {
    align-items: start;
    flex-direction: column;
  }

  .year {
    padding-top: 0;
  }

  .contact-card.wide {
    grid-column: auto;
  }

  .analytics-consent__inner {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .section,
  .page-hero {
    padding: 3rem 0;
  }

  .button,
  .nav-button {
    width: 100%;
  }

  .button-row.small .button {
    width: auto;
  }

  .publication-entry,
  .publication-card,
  .cv-section,
  .card {
    padding: 1.1rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .analytics-consent {
    width: calc(100% - 20px);
    margin-top: 10px;
  }

  .analytics-consent__actions {
    grid-template-columns: 1fr;
  }

  .consent-button {
    width: 100%;
  }
}

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