@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  --bg: #090b10;
  --bg-soft: rgba(17, 20, 29, 0.82);
  --panel: rgba(18, 23, 33, 0.78);
  --panel-strong: #10151f;
  --line: rgba(150, 169, 196, 0.15);
  --text: #f5f7fb;
  --muted: #a8b1c4;
  --accent: #7df9d0;
  --accent-2: #f6b65b;
  --danger: #ff7a7a;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  --radius: 28px;
  --radius-sm: 18px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(125, 249, 208, 0.14), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(246, 182, 91, 0.18), transparent 22%),
    linear-gradient(180deg, #080a0f 0%, #090b10 48%, #0d1017 100%);
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(125, 249, 208, 0.55);
  text-underline-offset: 0.18em;
  transition: color 180ms ease, text-decoration-color 180ms ease, opacity 180ms ease;
}

a:hover {
  color: #aafce2;
  text-decoration-color: currentColor;
}

a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible {
  outline: 3px solid var(--accent-2);
  outline-offset: 3px;
}

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 50;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  background: #06110e;
  color: var(--accent);
  border: 1px solid rgba(125, 249, 208, 0.35);
  text-decoration: none;
}

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

.background-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black 32%, transparent 82%);
  pointer-events: none;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(7, 9, 14, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.28);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 0 1px rgba(125, 249, 208, 0.16), 0 10px 24px rgba(0, 0, 0, 0.28);
  background: rgba(255, 255, 255, 0.05);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.brand-text {
  display: grid;
  gap: 0.1rem;
}

.brand-text strong {
  font-size: 0.98rem;
  letter-spacing: 0.02em;
}

.brand-text span,
.eyebrow,
.meta,
.chip,
.footer-copy,
.publication-links,
.kicker,
.nav-link {
  font-family: "IBM Plex Mono", monospace;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.site-nav a {
  padding: 0.75rem 1rem;
  border-radius: 999px;
  color: rgba(125, 249, 208, 0.9);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: 180ms ease;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(125, 249, 208, 0.18), rgba(246, 182, 91, 0.16));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.site-nav a:focus-visible,
.brand:focus-visible,
.button:focus-visible,
.button-secondary:focus-visible,
.chip:focus-visible,
.collapsible-toggle:focus-visible {
  outline-offset: 4px;
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  font: inherit;
}

.hero {
  padding: 5rem 0 2.5rem;
}

.hero-grid,
.two-col,
.contact-grid,
.footer-grid {
  display: grid;
  gap: 1.5rem;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: stretch;
}

.hero-copy,
.hero-aside,
.card,
.contact-card,
.metric-card {
  background: linear-gradient(180deg, rgba(18, 23, 33, 0.88), rgba(13, 16, 23, 0.88));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 2.1rem;
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -12% -18% auto;
  width: 18rem;
  height: 18rem;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(125, 249, 208, 0.16), transparent 65%);
}

.eyebrow {
  display: inline-flex;
  padding: 0.45rem 0.7rem;
  border: 1px solid rgba(125, 249, 208, 0.24);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1,
.page-hero h1 {
  margin: 1rem 0 1rem;
  font-size: clamp(2.8rem, 7vw, 5.7rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  max-width: 11ch;
}

.hero p.lead,
.page-hero p.lead {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.8;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.8rem;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.95rem 1.25rem;
  min-height: 3rem;
  transition: 180ms ease;
}

.button {
  background: linear-gradient(135deg, var(--accent), #8fecc8);
  color: #04110e;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  transform: translateY(-2px);
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--accent);
  background: rgba(255, 255, 255, 0.03);
  text-decoration: none;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 2rem;
}

.metric-card {
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.metric-card strong {
  display: block;
  font-size: 1.6rem;
}

.metric-card span {
  display: block;
  color: var(--muted);
  margin-top: 0.35rem;
  font-size: 0.82rem;
}

.hero-aside {
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

.portrait-frame {
  position: relative;
  min-height: 100%;
  overflow: hidden;
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(246, 182, 91, 0.16), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent);
}

.portrait-frame img {
  aspect-ratio: 1 / 1.08;
  object-fit: cover;
  width: 100%;
  opacity: 0.94;
  mix-blend-mode: luminosity;
}

.portrait-badge {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: rgba(7, 9, 13, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.8rem 0.95rem;
  border-radius: 999px;
  font-size: 0.8rem;
}

.portrait-badge::before {
  content: "";
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  background: var(--accent-2);
}

.section {
  padding: 2rem 0 1.25rem;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-head h2,
.section-head h3 {
  margin: 0.2rem 0 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.section-head p,
.section-intro {
  color: var(--muted);
  max-width: 60ch;
  line-height: 1.8;
}

.card {
  padding: 1.35rem;
}

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

.card h3,
.card h4,
.publication-title,
.timeline-item h3,
.teaching-item h3 {
  margin: 0;
  font-size: 1.06rem;
}

.card p,
.timeline-item p,
.teaching-item p,
.publication-item p,
.contact-card p {
  color: var(--muted);
  line-height: 1.75;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item,
.publication-item,
.teaching-item {
  position: relative;
  padding: 1.2rem 1.3rem 1.2rem 1.6rem;
  border-left: 1px solid rgba(125, 249, 208, 0.2);
  background: rgba(255, 255, 255, 0.025);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.timeline-item::before,
.publication-item::before,
.teaching-item::before {
  content: "";
  position: absolute;
  left: -0.42rem;
  top: 1.28rem;
  width: 0.78rem;
  height: 0.78rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(125, 249, 208, 0.5);
}

.meta,
.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.publication-links a {
  color: var(--accent);
}

.publication-links a,
.timeline-subtitle a,
.teaching-item h3 a,
.contact-card a,
.chip a {
  color: var(--accent);
}

.publication-links a,
.timeline-subtitle a,
.teaching-item h3 a,
.contact-card a {
  text-decoration-thickness: 1px;
}

.kicker {
  color: var(--accent-2);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.split-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1rem;
}

.page-hero {
  padding: 4rem 0 1.2rem;
}

.page-hero-card {
  padding: 2rem;
  background: linear-gradient(180deg, rgba(18, 23, 33, 0.88), rgba(13, 16, 23, 0.88));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.publication-list,
.teaching-list {
  display: grid;
  gap: 1rem;
}

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

.contact-card {
  padding: 1.5rem;
}

.contact-card strong {
  display: block;
  margin-bottom: 0.5rem;
}

.timeline-subtitle {
  margin-top: 0.4rem;
  color: var(--text);
  font-size: 0.96rem;
  font-weight: 500;
  line-height: 1.5;
}

.timeline-item h3 {
  font-size: 1.18rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.collapsible-group {
  margin-top: 1rem;
}

.collapsible-shell {
  background: linear-gradient(180deg, rgba(18, 23, 33, 0.82), rgba(12, 16, 24, 0.86));
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
}

.collapsible-header h2 {
  margin: 0;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

.collapsible-toggle {
  flex: 0 0 auto;
  min-width: 5.75rem;
  padding: 0.72rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: 180ms ease;
}

.collapsible-toggle:hover,
.collapsible-toggle[aria-expanded="true"] {
  background: linear-gradient(135deg, rgba(125, 249, 208, 0.14), rgba(246, 182, 91, 0.12));
  border-color: rgba(255, 255, 255, 0.18);
}

.collapsible-panel {
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.collapsible-panel[hidden] {
  display: none;
}

.collapsible-panel .publication-list,
.collapsible-panel .teaching-list,
.collapsible-panel .timeline {
  padding-top: 1rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .two-col,
  .split-section,
  .grid-cards,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero h1,
  .page-hero h1 {
    max-width: none;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
    padding: 0.68rem 0.9rem;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.8rem;
    border-radius: 22px;
    background: rgba(10, 13, 19, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }

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

  .site-nav a {
    text-align: center;
    padding: 0.68rem 0.9rem;
  }

  .hero {
    padding: 2rem 0 1rem;
  }

  .section {
    padding: 1rem 0 0.85rem;
  }

  .hero-grid {
    position: relative;
    display: block;
    gap: 0;
    padding: 1rem;
    background: linear-gradient(180deg, rgba(18, 23, 33, 0.9), rgba(13, 16, 23, 0.9));
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
  }

  .hero-copy,
  .hero-aside {
    background: none;
    border: 0;
    box-shadow: none;
  }

  .hero-aside {
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 5.5rem;
    padding: 0;
  }

  .hero-copy {
    padding: 0 0 0 6.35rem;
    min-height: 5.5rem;
  }

  .hero-copy::after {
    width: 11rem;
    height: 11rem;
    inset: auto -10% -14% auto;
  }

  .portrait-frame {
    border-radius: 18px;
    min-height: auto;
  }

  .portrait-frame img {
    aspect-ratio: 1 / 1.08;
    min-height: 5.5rem;
  }

  .portrait-badge {
    display: none;
  }

  .hero h1 {
    margin: 0.35rem 0 0.55rem;
    font-size: clamp(2rem, 9vw, 2.7rem);
    line-height: 0.98;
    max-width: none;
  }

  .page-hero h1 {
    max-width: none;
    font-size: clamp(2.1rem, 9vw, 3rem);
  }

  .hero p.lead,
  .page-hero p.lead {
    font-size: 0.95rem;
    line-height: 1.55;
  }

  .hero-actions {
    gap: 0.55rem;
    margin-top: 1rem;
  }

  .button,
  .button-secondary {
    min-height: 2.6rem;
    padding: 0.72rem 0.95rem;
    font-size: 0.88rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 0.28rem;
    margin-top: 0.85rem;
    max-width: 10.75rem;
  }

  .metric-card {
    padding: 0.42rem 0.62rem;
    border-radius: 14px;
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: baseline;
    gap: 0.3rem 0.45rem;
  }

  .metric-card strong {
    font-size: 0.96rem;
    line-height: 1;
  }

  .metric-card span {
    margin-top: 0;
    font-size: 0.58rem;
    line-height: 1.15;
    text-align: left;
  }

  .page-hero {
    padding: 2rem 0 0.75rem;
  }

  .page-hero-card,
  .card,
  .contact-card {
    padding: 1rem;
    border-radius: 20px;
  }

  .grid-cards,
  .split-section,
  .two-col,
  .contact-grid {
    gap: 0.8rem;
  }

  .grid-cards {
    gap: 0;
    border: 1px solid var(--line);
    border-radius: 18px;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(18, 23, 33, 0.84), rgba(13, 16, 23, 0.84));
    box-shadow: var(--shadow);
  }

  .grid-cards .card {
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    padding: 0.78rem 0.9rem;
  }

  .grid-cards .card + .card {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .grid-cards .card h3 {
    font-size: 0.92rem;
  }

  .grid-cards .card p {
    margin-top: 0.35rem;
    font-size: 0.86rem;
    line-height: 1.45;
  }

  .section-head {
    gap: 0.75rem;
    margin-bottom: 0.8rem;
  }

  .section-head h2,
  .section-head h3 {
    font-size: clamp(1.45rem, 7vw, 2rem);
  }

  .section-head p,
  .section-intro {
    line-height: 1.55;
  }

  .card h3,
  .card h4,
  .publication-title,
  .timeline-item h3,
  .teaching-item h3 {
    font-size: 0.98rem;
  }

  .card p,
  .timeline-item p,
  .teaching-item p,
  .publication-item p,
  .contact-card p {
    line-height: 1.6;
    font-size: 0.92rem;
  }

  .chips {
    gap: 0.28rem;
    margin-top: 0.65rem;
  }

  .chip {
    padding: 0.22rem 0.4rem;
    min-height: 24px;
    font-size: 0.54rem;
    letter-spacing: 0.05em;
  }

  .publication-list,
  .teaching-list,
  .timeline {
    gap: 0.72rem;
  }

  .timeline-item,
  .publication-item,
  .teaching-item {
    padding: 0.82rem 0.88rem 0.82rem 1.08rem;
  }

  .timeline-item::before,
  .publication-item::before,
  .teaching-item::before {
    left: -0.34rem;
    top: 1.05rem;
    width: 0.62rem;
    height: 0.62rem;
  }

  .meta,
  .publication-links {
    gap: 0.35rem 0.65rem;
    font-size: 0.64rem;
  }

  .timeline-subtitle {
    margin-top: 0.24rem;
    font-size: 0.86rem;
    line-height: 1.28;
  }

  .timeline-item h3 {
    font-size: 0.94rem;
    letter-spacing: 0.03em;
  }

  .collapsible-group {
    margin-top: 0.75rem;
  }

  .collapsible-shell {
    border-radius: 18px;
  }

  .collapsible-header {
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.75rem 0.85rem;
  }

  .collapsible-header h2 {
    font-size: 0.94rem;
  }

  .collapsible-toggle {
    width: auto;
    min-width: 4.5rem;
    margin-left: auto;
    min-height: 2rem;
    padding: 0.46rem 0.68rem;
    font-size: 0.72rem;
  }

  .collapsible-panel {
    padding: 0 0.85rem 0.85rem;
  }

  .collapsible-panel .publication-list,
  .collapsible-panel .teaching-list,
  .collapsible-panel .timeline {
    padding-top: 0.8rem;
  }
}