:root {
  color-scheme: dark;
  --bg: #070b16;
  --bg-soft: #0d1428;
  --panel: rgba(18, 27, 52, 0.78);
  --panel-solid: #101a33;
  --text: #f5f7fb;
  --muted: #a8b3cf;
  --subtle: #7683a3;
  --line: rgba(151, 169, 217, 0.22);
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --accent-3: #2dd4bf;
  --shadow: 0 18px 56px rgba(0, 0, 0, 0.28);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max-width: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f7fb;
  --bg-soft: #ffffff;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-solid: #ffffff;
  --text: #0b1020;
  --muted: #475569;
  --subtle: #64748b;
  --line: rgba(15, 23, 42, 0.12);
  --accent: #0369a1;
  --accent-2: #7c3aed;
  --accent-3: #0f766e;
  --shadow: 0 18px 52px rgba(15, 23, 42, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 8%, rgba(125, 211, 252, 0.12), transparent 26rem),
    radial-gradient(circle at 82% 0%, rgba(167, 139, 250, 0.12), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.55;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 68%);
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

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

.site-header {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 16px 0 34px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(9, 14, 29, 0.72);
  backdrop-filter: blur(20px);
  box-shadow: 0 14px 50px rgba(0, 0, 0, 0.2);
}

:root[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.78);
}

.brand,
.nav,
.hero-actions,
.contact-links,
.repo-meta,
.filter-bar {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #06101d;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 10px 30px rgba(125, 211, 252, 0.25);
}

.brand-text {
  padding-right: 8px;
}

.nav {
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.nav a,
.theme-toggle,
.filter {
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  transition: 180ms ease;
}

.nav a {
  padding: 9px 13px;
  font-size: 14px;
}

.nav a:hover,
.theme-toggle:hover,
.filter:hover,
.filter.active {
  color: var(--text);
  background: rgba(125, 211, 252, 0.12);
}

.theme-toggle {
  padding: 10px 16px;
  border: 1px solid var(--line);
}

.section {
  padding: 68px 0;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.42fr);
  gap: 34px;
  align-items: center;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 46px;
  align-items: center;
  padding: 42px 0 72px;
}

.hero-copy {
  max-width: 860px;
}

.hero-heading {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
}

.hero-avatar {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.18);
}

.hero-heading h1 {
  margin-bottom: 0;
}

.citation-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.profile-label {
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.citation-badge {
  display: inline-flex;
  align-items: center;
  margin-bottom: 12px;
}

.citation-badge img {
  height: 24px;
}

.citation-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 660px;
  margin-bottom: 16px;
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(24px, 2.7vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.035em;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
  line-height: 1.32;
  letter-spacing: -0.02em;
}

.hero-text {
  max-width: 720px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 18px);
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover,
.project-card:hover {
  transform: translateY(-3px);
  border-color: rgba(125, 211, 252, 0.55);
}

.button.primary {
  color: #06101d;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  font-weight: 800;
}

.focus-card,
.timeline-item,
.publication,
.project-card,
.contact {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.focus-card p,
.timeline-item p,
.publication p,
.project-card p,
.contact p {
  color: var(--muted);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 26px;
}

.publication-tabs {
  display: inline-flex;
  gap: 6px;
  margin: 0 0 22px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.publication-tab {
  min-width: 110px;
  padding: 9px 16px;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  transition: 180ms ease;
}

.publication-tab:hover,
.publication-tab.active {
  color: #06101d;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
}

.publication-panel {
  display: none;
}

.publication-panel.active {
  display: block;
}

.inline-heading {
  max-width: none;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
}

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

.focus-card,
.project-card {
  position: relative;
  min-height: 210px;
  padding: 22px;
  border-radius: var(--radius-md);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.focus-index,
.repo-tag {
  display: inline-flex;
  margin-bottom: 32px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.split {
  display: grid;
  grid-template-columns: minmax(240px, 0.58fr) minmax(0, 1.42fr);
  gap: 40px;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  position: relative;
  padding: 20px 22px 20px 78px;
  border-radius: var(--radius-md);
}

.timeline-item span {
  position: absolute;
  left: 22px;
  top: 21px;
  color: var(--accent-3);
  font-weight: 900;
}

.filter-bar {
  gap: 8px;
  flex-wrap: wrap;
}

.filter {
  padding: 9px 14px;
  border: 1px solid var(--line);
}

.publication-list {
  display: grid;
  gap: 10px;
}

.publication-list.compact {
  gap: 8px;
}

.publication {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: 16px;
  padding: 15px 18px;
  border-radius: 16px;
  transition: opacity 180ms ease, transform 180ms ease;
}

.publication.is-hidden {
  display: none;
}

.pub-year {
  color: var(--accent);
  font-size: 16px;
  font-weight: 800;
}

.award {
  display: inline-flex;
  margin-left: 8px;
  padding: 3px 8px;
  border: 1px solid rgba(125, 211, 252, 0.35);
  border-radius: 999px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0;
  white-space: nowrap;
  vertical-align: 2px;
  background: rgba(125, 211, 252, 0.08);
}

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

.project-card {
  display: flex;
  min-height: 160px;
  flex-direction: column;
}

.project-card.featured {
  background:
    linear-gradient(135deg, rgba(125, 211, 252, 0.08), rgba(167, 139, 250, 0.06)),
    var(--panel);
}

.project-card p {
  flex: 1;
}

.repo-meta {
  margin-top: auto;
  justify-content: flex-start;
  gap: 12px;
  padding-top: 18px;
  color: var(--subtle);
  font-size: 13px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 28px;
  border-radius: 22px;
}

.contact-links {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.contact-links a {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 34px 0 52px;
  color: var(--subtle);
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--accent);
}

@media (max-width: 960px) {
  .site-header {
    align-items: stretch;
    border-radius: 28px;
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
  }

  .section-grid,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .citation-card {
    max-width: 320px;
  }

  .focus-grid,
  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .category-heading {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

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

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 24px, var(--max-width));
  }

  .site-header {
    top: 8px;
    margin-top: 8px;
  }

  .brand-text {
    display: none;
  }

  h1 {
    font-size: clamp(30px, 10vw, 44px);
  }

  .hero-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .hero-avatar {
    width: 64px;
    height: 64px;
    border-radius: 16px;
  }

  .focus-grid,
  .project-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .publication {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .award {
    margin: 6px 0 0;
    width: fit-content;
  }

  .timeline-item {
    padding-left: 24px;
  }

  .timeline-item span {
    position: static;
    display: block;
    margin-bottom: 8px;
  }

  .site-footer {
    flex-direction: column;
  }
}