:root {
  --bg: #07090f;
  --bg-elevated: #0e1320;
  --bg-soft: #12182a;
  --text: #e8edf7;
  --muted: #8b95ad;
  --faint: #5c6780;
  --line: rgba(232, 237, 247, 0.1);
  --accent: #5ce1c5;
  --accent-2: #ffb454;
  --accent-3: #7aa2ff;
  --danger: #ff6b8a;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  --radius: 22px;
  --font: "Outfit", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1120px;
}

[data-theme="light"] {
  --bg: #f4f1ea;
  --bg-elevated: #ffffff;
  --bg-soft: #ebe6dc;
  --text: #171a22;
  --muted: #5b6478;
  --faint: #8790a3;
  --line: rgba(23, 26, 34, 0.1);
  --accent: #0f8f7a;
  --accent-2: #c97916;
  --accent-3: #355dcc;
  --shadow: 0 24px 60px rgba(40, 30, 10, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(92, 225, 197, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(122, 162, 255, 0.08), transparent 50%),
    var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  pointer-events: none;
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.18;
  z-index: 0;
}

.glow-a {
  top: 10%;
  left: -8%;
  background: var(--accent);
}

.glow-b {
  right: -10%;
  bottom: 20%;
  background: var(--accent-3);
}

.nav,
main,
.footer {
  position: relative;
  z-index: 1;
}

.nav {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 2rem);
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line);
  z-index: 20;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav-mark {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background:
    linear-gradient(135deg, var(--accent), transparent 60%),
    linear-gradient(315deg, var(--accent-2), transparent 55%),
    var(--accent-3);
  box-shadow: 0 0 18px color-mix(in srgb, var(--accent) 50%, transparent);
}

.nav-links {
  display: flex;
  gap: clamp(0.75rem, 1.5vw, 1.25rem);
  font-size: 0.92rem;
  color: var(--muted);
  flex-wrap: wrap;
  justify-content: center;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.icon-link {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.icon-link:hover {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  cursor: pointer;
  display: grid;
  place-items: center;
}

.theme-icon::before {
  content: "◐";
  color: var(--accent-2);
  font-size: 1rem;
}

.hero {
  position: relative;
  min-height: min(88vh, 780px);
  display: grid;
  align-items: center;
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 4vw, 2rem) 4rem;
  overflow: hidden;
}

#field-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--bg) 88%, transparent) 0%, color-mix(in srgb, var(--bg) 45%, transparent) 48%, transparent 75%),
    linear-gradient(180deg, transparent 55%, var(--bg) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 70%, transparent);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 12px transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6.2vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 700;
  max-width: 12ch;
}

.hero h1 span {
  display: block;
}

.hero-role {
  margin: 1.2rem 0 0.8rem;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  color: var(--accent-2);
  font-weight: 500;
}

.hero-lede {
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn.primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent-3)));
  color: #061016;
  border-color: transparent;
  font-weight: 600;
}

[data-theme="light"] .btn.primary {
  color: #fff;
}

.btn.ghost {
  background: color-mix(in srgb, var(--bg-elevated) 70%, transparent);
  color: var(--text);
}

.btn.ghost:hover {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
}

.field-caption {
  margin: 2.6rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

.field-caption span {
  color: var(--accent);
}

.fade-up {
  opacity: 1;
  transform: none;
  animation: fadeUp 0.8s ease both;
}

.delay-1 { animation-delay: 0.08s; }
.delay-2 { animation-delay: 0.16s; }
.delay-3 { animation-delay: 0.24s; }
.delay-4 { animation-delay: 0.32s; }
.delay-5 { animation-delay: 0.4s; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.section {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 5.5rem 0;
}

.section-head {
  margin-bottom: 2.4rem;
}

.section-head h2,
.contact-card h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2.5rem;
  align-items: center;
}

.about-portrait {
  position: relative;
  max-width: 380px;
}

.about-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 12%;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--line);
}

.portrait-frame {
  position: absolute;
  inset: 18px -14px -14px 18px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: var(--radius);
  z-index: -1;
}

.about-copy p {
  color: var(--muted);
  font-size: 1.05rem;
}

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

.chip-row,
.tech-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 1.4rem 0 0;
  list-style: none;
}

.chip-row li,
.tech-row span {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: 0.82rem;
  color: var(--muted);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.2rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--bg-elevated) 88%, transparent), transparent 70%),
    var(--bg-elevated);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.timeline-item:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  transform: translateY(-2px);
}

.timeline-when {
  display: block;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
}

.timeline-where {
  display: block;
  margin-top: 0.35rem;
  color: var(--faint);
  font-size: 0.9rem;
}

.timeline-body h3 {
  margin: 0;
  font-size: 1.25rem;
}

.org {
  margin: 0.25rem 0 0.6rem;
  color: var(--muted);
}

.focus {
  margin: 0 0 0.8rem;
  color: var(--accent-2);
  font-size: 0.95rem;
}

.timeline-body ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.timeline-body li + li {
  margin-top: 0.35rem;
}

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

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.3rem;
}

.filter {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
}

.filter.active,
.filter:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.pub-list {
  display: grid;
  gap: 0.9rem;
}

.pub-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1rem;
  padding: 1.2rem 1.3rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.pub-card.hidden {
  display: none;
}

.pub-card:hover {
  border-color: color-mix(in srgb, var(--accent-3) 40%, var(--line));
  transform: translateX(4px);
}

.pub-year {
  font-family: var(--mono);
  color: var(--accent-2);
  font-size: 0.95rem;
  padding-top: 0.15rem;
}

.pub-body h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.authors,
.venue {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.pub-links {
  display: flex;
  gap: 0.8rem;
  margin-top: 0.7rem;
}

.pub-links a {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
}

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

.project-card {
  padding: 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.project-card.featured {
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 16%, transparent), transparent 45%),
    var(--bg-elevated);
}

.project-tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.project-top {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 0.7rem;
}

.project-top h3 {
  margin: 0;
  font-size: 1.2rem;
}

.project-card p {
  margin: 0;
  color: var(--muted);
  flex: 1;
}

.project-link {
  margin-top: 1rem;
  color: var(--accent-2);
  font-weight: 500;
}

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

.skill-columns > div {
  padding: 1.2rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}

.skill-columns h3 {
  margin: 0 0 0.8rem;
  font-size: 0.95rem;
  color: var(--accent);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.skill-columns ul {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
}

.skill-columns li + li {
  margin-top: 0.4rem;
}

/* Research areas */
.area-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.area-card {
  position: relative;
  padding: 1.5rem 1.35rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 7%, transparent), transparent 40%),
    var(--bg-elevated);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.area-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

.area-index {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.area-card h3 {
  margin: 0.6rem 0 0.5rem;
  font-size: 1.15rem;
}

.area-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  flex: 1;
}

/* Lined lists (teaching, honors) */
.lined-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lined-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.lined-list.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 2.5rem;
}

.lined-when {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.lined-what {
  color: var(--muted);
}

.lined-what strong {
  color: var(--text);
  font-weight: 500;
}

.lined-what em {
  font-style: normal;
  color: var(--faint);
  font-size: 0.9em;
}

.split-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 2rem;
  align-items: start;
}

.side-card {
  padding: 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}

.side-card h3 {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.side-card h3 + p {
  margin: 0 0 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.side-card p:last-child {
  margin-bottom: 0;
}

.section-foot {
  margin: 1.6rem 0 0;
  color: var(--faint);
  font-size: 0.92rem;
}

.section-foot a {
  color: var(--accent);
}

/* Beyond the lab */
.beyond-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.beyond-card {
  padding: 1.6rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}

.beyond-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.16;
}

.beyond-card.chess::after { background: var(--accent-3); }
.beyond-card.markets::after { background: var(--accent-2); }
.beyond-card.languages::after { background: var(--accent); }

.beyond-icon {
  font-size: 1.9rem;
  line-height: 1;
  margin-bottom: 0.7rem;
}

.beyond-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

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

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

.lang-list li {
  display: grid;
  grid-template-columns: 4.5rem 1fr 3.4rem;
  align-items: center;
  gap: 0.7rem;
  padding: 0.32rem 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.lang-list em {
  font-style: normal;
  color: var(--faint);
  font-size: 0.82rem;
  text-align: right;
}

.bar {
  height: 5px;
  border-radius: 999px;
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
}

.bar::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
}

.bar[data-level="5"]::before { width: 100%; }
.bar[data-level="4"]::before { width: 78%; }
.bar[data-level="3"]::before { width: 58%; }
.bar[data-level="2"]::before { width: 34%; }
.bar[data-level="1"]::before { width: 18%; }

.contact {
  padding-bottom: 3rem;
}

.contact-card {
  padding: clamp(1.8rem, 4vw, 3rem);
  border-radius: 28px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 40%),
    radial-gradient(circle at 90% 80%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 35%),
    var(--bg-elevated);
  box-shadow: var(--shadow);
}

.contact-card p {
  max-width: 40rem;
  color: var(--muted);
}

.footer {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--faint);
  font-size: 0.88rem;
}

.footer-note {
  text-align: right;
}

@media (max-width: 1080px) {
  .area-grid,
  .skill-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 980px) {
  .about-grid,
  .timeline-item,
  .split-grid,
  .lined-list.two-col {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  .about-portrait {
    max-width: 300px;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 720px) {
  .area-grid,
  .project-grid,
  .beyond-grid,
  .skill-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .pub-card,
  .lined-list li {
    grid-template-columns: 1fr;
  }

  .lined-list li {
    gap: 0.25rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .footer {
    flex-direction: column;
  }

  .footer-note {
    text-align: left;
  }
}

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

  .fade-up,
  .pulse-dot {
    animation: none;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }
}