:root {
  color-scheme: dark;
  --bg: #111118;
  --bg-soft: #171720;
  --surface: rgba(28, 28, 38, 0.76);
  --surface-strong: #242432;
  --text: #e6e1d8;
  --muted: #aaa49a;
  --line: rgba(230, 225, 216, 0.16);
  --accent: #b9a7ff;
  --accent-dark: #d8cffd;
  --accent-soft: rgba(185, 167, 255, 0.15);
  --ink: #fffaf0;
  --warm: #f2c078;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.44);
  --shadow-soft: 0 18px 55px rgba(0, 0, 0, 0.26);
  --radius: 28px;
  --radius-sm: 18px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #0e0e14 0%, var(--bg) 52%, #17151d 100%);
  color: var(--text);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  display: none;
}

::selection {
  background: rgba(185, 167, 255, 0.30);
  color: var(--ink);
}

a {
  color: var(--accent-dark);
  text-decoration: none;
  transition: color 180ms ease, transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

a:hover,
a:focus-visible {
  color: var(--accent);
}

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

p {
  margin: 0;
}

p + p {
  margin-top: 1rem;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.045em;
  line-height: 1.04;
}

h1 {
  max-width: 10ch;
  font-size: clamp(4rem, 12vw, 8.7rem);
  font-weight: 900;
}

h2 {
  font-size: clamp(2rem, 4.6vw, 4.8rem);
  font-weight: 850;
}

h3 {
  font-size: clamp(1.28rem, 2vw, 1.7rem);
  font-weight: 800;
}

ul {
  margin: 0;
  padding-left: 1.15rem;
}

li + li {
  margin-top: 0.7rem;
}

.skip-link,
.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;
}

.skip-link:focus {
  top: 1rem;
  left: 1rem;
  z-index: 9999;
  width: auto;
  height: auto;
  padding: 0.85rem 1rem;
  margin: 0;
  clip: auto;
  border-radius: 999px;
  background: var(--accent);
  color: #121018;
}

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

.section {
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  scroll-margin-top: 6rem;
}

.section-tinted {
  position: relative;
  background: rgba(255, 250, 240, 0.035);
  border-block: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}

.section-heading {
  position: sticky;
  top: 7rem;
}

.section-heading.centered {
  position: static;
  max-width: 760px;
  margin: 0 auto clamp(2rem, 5vw, 4rem);
  text-align: center;
}

.section-heading.centered p:not(.eyebrow) {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1.06rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1rem;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 0.35rem var(--accent-soft);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(calc(100% - 2rem), 1180px);
  margin: 1rem auto 0;
  padding: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 999px;
  background: rgba(18, 18, 26, 0.72);
  backdrop-filter: blur(22px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.30);
}

.site-header.is-scrolled {
  background: rgba(18, 18, 26, 0.92);
  border-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0;
  min-width: max-content;
  color: var(--ink);
  font-weight: 850;
}

.brand:hover,
.brand:focus-visible {
  color: var(--ink);
}

.brand-mark {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.site-nav a {
  padding: 0.72rem 0.95rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 760;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.nav-toggle {
  display: none;
  width: 2.65rem;
  height: 2.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(248, 250, 252, 0.10);
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 1.05rem;
  height: 2px;
  margin: 0.25rem auto;
  border-radius: 999px;
  background: var(--ink);
}

.hero {
  min-height: calc(100vh - 6rem);
  display: grid;
  align-items: center;
  padding-top: clamp(3rem, 6vw, 6.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(320px, 0.84fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.hero-lede {
  max-width: 760px;
  margin-top: 1.4rem;
  color: var(--muted);
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3.15rem;
  padding: 0.85rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  line-height: 1;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--warm));
  color: #121018;
  box-shadow: 0 16px 35px rgba(185, 167, 255, 0.20);
}

.button-primary:hover,
.button-primary:focus-visible {
  color: #121018;
  background: linear-gradient(135deg, #d8cffd, #ffe0a3);
}

.button-secondary {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: var(--surface-strong);
  color: var(--accent-dark);
}

.button-light {
  background: rgba(248, 250, 252, 0.10);
  border-color: rgba(248, 250, 252, 0.18);
  color: var(--ink);
}

.button-light:hover,
.button-light:focus-visible {
  background: var(--accent);
  color: #121018;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  max-width: 780px;
  margin: 2.2rem 0 0;
}

.hero-facts div,
.mini-card,
.research-card,
.approach-card,
.approach-note,
.skill-card,
.toolkit-card,
.publication-card,
.profile-card {
  border: 1px solid rgba(255, 250, 240, 0.14);
  background: linear-gradient(180deg, rgba(255, 250, 240, 0.055), rgba(255, 250, 240, 0.025)), var(--surface);
  box-shadow: var(--shadow-soft), inset 0 1px 0 rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(18px);
}

.hero-facts div {
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.hero-facts dt {
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 750;
  line-height: 1.35;
}

.profile-card {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--radius) + 10px);
}

.profile-card::before {
  display: none;
}

.portrait-shell {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 430px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(17, 17, 24, 0.94), rgba(185, 167, 255, 0.22));
}

.portrait-shell img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.02) contrast(1.02);
}

.portrait-fallback {
  width: 8rem;
  height: 8rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(248, 250, 252, 0.10);
  color: var(--ink);
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.06em;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.28);
}

.profile-card-body {
  position: relative;
  padding: clamp(1.35rem, 3vw, 2rem);
}

.profile-kicker {
  margin-bottom: 0.6rem;
  color: var(--accent-dark);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.profile-card h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}

.profile-card p:not(.profile-kicker) {
  color: var(--muted);
}

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

.social-links a {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(248, 250, 252, 0.06);
  color: var(--ink);
  font-size: 1rem;
}

.social-links a:hover,
.social-links a:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(185, 167, 255, 0.40);
  color: var(--accent-dark);
}

.content-stack {
  color: var(--muted);
  font-size: 1.05rem;
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 2rem;
}

.mini-card {
  min-height: 9rem;
  padding: 1.2rem;
  border-radius: var(--radius-sm);
}

.mini-card span {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--accent-dark);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.mini-card strong {
  display: block;
  color: var(--ink);
  line-height: 1.3;
}

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

.research-card {
  position: relative;
  min-height: 100%;
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: var(--radius);
  overflow: hidden;
}

.research-card::after {
  display: none;
}

.card-number {
  display: inline-grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.35rem;
  border-radius: 1rem;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 900;
}

.research-card h3,
.research-card p {
  position: relative;
  z-index: 1;
}

.research-card p {
  color: var(--muted);
}

.research-card p:first-of-type {
  margin-top: 1rem;
}


.principle {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--ink) !important;
  font-weight: 700;
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.approach-card {
  position: relative;
  min-height: 100%;
  padding: clamp(1.3rem, 2.8vw, 1.85rem);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.approach-card::after {
  display: none;
}

.approach-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.45rem;
  height: 2.45rem;
  margin-bottom: 1rem;
  border-radius: 0.85rem;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 900;
}

.approach-card h3,
.approach-card p,
.approach-card ul {
  position: relative;
  z-index: 1;
}

.approach-card h3 {
  margin-bottom: 0.85rem;
}

.approach-card p,
.approach-card li {
  color: var(--muted);
}

.approach-card ul {
  margin-top: 1rem;
}

.approach-note {
  display: grid;
  grid-template-columns: minmax(180px, 0.32fr) minmax(0, 1fr);
  gap: 1.2rem;
  align-items: center;
  margin-top: 1rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(185, 167, 255, 0.12), rgba(28, 28, 38, 0.84)),
    var(--surface);
}

.approach-note p {
  color: var(--muted);
  font-size: 1.06rem;
}

.timeline {
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0.57rem;
  width: 2px;
  background: var(--line);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(150px, 0.34fr) minmax(0, 1fr);
  gap: 1.5rem;
  padding-left: 2.2rem;
}

.timeline-item + .timeline-item {
  margin-top: 2.2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 1.15rem;
  height: 1.15rem;
  border: 4px solid var(--bg);
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft);
}

.timeline-date {
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-content {
  padding-bottom: 0.25rem;
}

.timeline-content .role {
  margin: 0.45rem 0 0.9rem;
  color: var(--muted);
  font-weight: 750;
}

.timeline-content p:not(.role) {
  color: var(--muted);
}

.skills-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.44fr);
  gap: 1rem;
  align-items: start;
}

.skills-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.skill-card,
.toolkit-card,
.publication-card {
  padding: clamp(1.25rem, 2.6vw, 1.7rem);
  border-radius: var(--radius-sm);
}

.skill-card h3,
.toolkit-card h3 {
  margin-bottom: 1rem;
}

.skill-card li,
.publication-card p,
.toolkit-card {
  color: var(--muted);
}

.toolkit-card {
  position: sticky;
  top: 7rem;
}

.tool-grid {
  display: grid;
  gap: 0.7rem;
}

.tool-grid span {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(248, 250, 252, 0.055);
  color: var(--ink);
  font-weight: 760;
}

.tool-grid i {
  color: var(--accent-dark);
  font-size: 1.25rem;
}

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

.publication-card h3 {
  margin-bottom: 0.9rem;
}

.publication-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.2rem;
}

.publication-actions a,
.publication-actions span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.52rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.86rem;
  font-weight: 800;
}

.final-cta {
  position: relative;
  overflow: hidden;
  background: #101016;
  color: rgba(248, 250, 252, 0.78);
  text-align: center;
}

.final-cta::before,
.final-cta::after {
  display: none;
}

.final-cta .container {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.final-cta h2 {
  color: var(--ink);
}

.final-cta p:not(.eyebrow) {
  margin: 1rem auto 1.7rem;
  font-size: 1.12rem;
}

.final-cta .eyebrow {
  color: #fff0c2;
}

.final-cta .eyebrow::before {
  background: #fff0c2;
  box-shadow: 0 0 0 0.35rem rgba(255, 240, 194, 0.17);
}

.site-footer {
  padding: 1.6rem 0;
  background: #101016;
  color: rgba(248, 250, 252, 0.62);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.92rem;
}

.site-footer a {
  color: var(--ink);
  font-weight: 750;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 680ms ease, transform 680ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 980px) {
  .section-grid,
  .hero-grid,
  .skills-layout,
  .approach-grid,
  .approach-note {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .toolkit-card {
    position: static;
  }

  .hero {
    min-height: auto;
  }

  .profile-card {
    max-width: 620px;
  }

  .portrait-shell {
    min-height: 360px;
  }

  .card-grid,
  .highlight-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .site-header {
    align-items: flex-start;
    border-radius: 1.55rem;
  }

  .nav-toggle {
    display: block;
    flex: 0 0 auto;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    left: 0;
    display: grid;
    gap: 0.25rem;
    padding: 0.6rem;
    border: 1px solid var(--line);
    border-radius: 1.5rem;
    background: rgba(18, 18, 26, 0.97);
    box-shadow: var(--shadow-soft);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 0.85rem 1rem;
  }

  .hero-facts,
  .skills-cards,
  .approach-grid {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 0.5rem;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    padding-left: 2rem;
  }

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

@media (max-width: 520px) {
  .container {
    width: min(calc(100% - 1.1rem), var(--container));
  }

  .site-header {
    width: min(calc(100% - 1rem), 1180px);
    margin-top: 0.5rem;
  }

  .brand-text {
    max-width: 9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero-actions,
  .publication-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .portrait-shell {
    min-height: 300px;
  }
}