:root {
  color-scheme: dark;
  --bg-canvas: #0b0d10;
  --bg-elevated: rgba(20, 22, 25, 0.82);
  --bg-muted: rgba(26, 29, 33, 0.72);
  --bg-strong: #14171b;
  --bg-start: #060708;
  --bg-mid: #0b0d10;
  --bg-end: #090a0c;
  --bg-radial-strong: rgba(255, 255, 255, 0.07);
  --bg-radial-soft: rgba(255, 255, 255, 0.035);
  --grid-line: rgba(255, 255, 255, 0.03);
  --fg-default: #eceff3;
  --fg-muted: #a5adb8;
  --fg-subtle: #7f8791;
  --border-default: rgba(236, 239, 243, 0.12);
  --border-strong: rgba(236, 239, 243, 0.22);
  --accent: #d3d8df;
  --accent-soft: rgba(211, 216, 223, 0.12);
  --surface-top: rgba(255, 255, 255, 0.04);
  --surface-bottom: rgba(255, 255, 255, 0.015);
  --panel-top: rgba(17, 22, 29, 0.88);
  --panel-bottom: rgba(13, 17, 23, 0.92);
  --nav-bg: rgba(11, 13, 16, 0.76);
  --mark-bg: rgba(255, 255, 255, 0.03);
  --code-bg: rgba(255, 255, 255, 0.04);
  --button-ghost-bg: rgba(255, 255, 255, 0.03);
  --button-primary-border: rgba(236, 239, 243, 0.18);
  --button-primary-top: rgba(255, 255, 255, 0.09);
  --button-primary-bottom: rgba(255, 255, 255, 0.04);
  --hero-glow: rgba(255, 255, 255, 0.08);
  --portrait-frame-top: rgba(255, 255, 255, 0.08);
  --portrait-frame-bottom: rgba(255, 255, 255, 0.01);
  --portrait-overlay-top: rgba(6, 8, 11, 0.05);
  --portrait-overlay-mid: rgba(6, 8, 11, 0.28);
  --portrait-overlay-bottom: rgba(6, 8, 11, 0.55);
  --toggle-bg: rgba(255, 255, 255, 0.03);
  --toggle-indicator: #eceff3;
  --success: #3fb950;
  --shadow-soft: 0 24px 80px rgba(0, 0, 0, 0.45);
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --page-width: 1180px;
  --content-width: 76ch;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg-canvas: #ece8e1;
  --bg-elevated: rgba(244, 241, 235, 0.9);
  --bg-muted: rgba(232, 226, 217, 0.82);
  --bg-strong: #ddd7cd;
  --bg-start: #e4dfd7;
  --bg-mid: #ece8e1;
  --bg-end: #e7e2da;
  --bg-radial-strong: rgba(255, 255, 255, 0.44);
  --bg-radial-soft: rgba(255, 255, 255, 0.2);
  --grid-line: rgba(23, 26, 31, 0.045);
  --fg-default: #16191f;
  --fg-muted: #505962;
  --fg-subtle: #727b85;
  --border-default: rgba(22, 25, 31, 0.12);
  --border-strong: rgba(22, 25, 31, 0.2);
  --accent: #1f242b;
  --accent-soft: rgba(31, 36, 43, 0.08);
  --surface-top: rgba(255, 255, 255, 0.52);
  --surface-bottom: rgba(255, 255, 255, 0.22);
  --panel-top: rgba(247, 243, 237, 0.92);
  --panel-bottom: rgba(239, 234, 225, 0.96);
  --nav-bg: rgba(247, 243, 237, 0.78);
  --mark-bg: rgba(255, 255, 255, 0.34);
  --code-bg: rgba(22, 25, 31, 0.05);
  --button-ghost-bg: rgba(255, 255, 255, 0.28);
  --button-primary-border: rgba(22, 25, 31, 0.16);
  --button-primary-top: rgba(22, 25, 31, 0.08);
  --button-primary-bottom: rgba(22, 25, 31, 0.03);
  --hero-glow: rgba(255, 255, 255, 0.22);
  --portrait-frame-top: rgba(255, 255, 255, 0.38);
  --portrait-frame-bottom: rgba(255, 255, 255, 0.16);
  --portrait-overlay-top: rgba(245, 241, 235, 0.02);
  --portrait-overlay-mid: rgba(230, 224, 214, 0.06);
  --portrait-overlay-bottom: rgba(216, 209, 198, 0.16);
  --toggle-bg: rgba(255, 255, 255, 0.34);
  --toggle-indicator: #16191f;
  --shadow-soft: 0 20px 52px rgba(20, 24, 29, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--fg-default);
  background:
    radial-gradient(circle at top right, var(--bg-radial-strong), transparent 28%),
    radial-gradient(circle at top left, var(--bg-radial-soft), transparent 22%),
    linear-gradient(180deg, var(--bg-start) 0%, var(--bg-mid) 52%, var(--bg-end) 100%);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

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

code {
  padding: 0.12rem 0.35rem;
  border: 1px solid var(--border-default);
  border-radius: 0.45rem;
  background: var(--code-bg);
  font-family: var(--font-mono);
  font-size: 0.92em;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.page-shell {
  position: relative;
  width: min(calc(100% - 2rem), var(--page-width));
  margin: 0 auto;
  padding-bottom: 3rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  backdrop-filter: blur(18px);
}

.site-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--border-default);
  border-radius: 0.8rem;
  background: var(--mark-bg);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: var(--nav-bg);
}

.site-nav a {
  color: var(--fg-muted);
  font-size: 0.92rem;
}

.site-nav a:hover {
  color: var(--fg-default);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 2.6rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: var(--toggle-bg);
  color: var(--fg-default);
  font: inherit;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
}

.theme-toggle-indicator {
  display: inline-block;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: var(--toggle-indicator);
  box-shadow: 0 0 0 0.2rem var(--accent-soft);
  flex-shrink: 0;
}

.theme-toggle-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero {
  padding: 3rem 0 1rem;
}

.eyebrow,
.kicker,
.panel-tag,
.panel-code,
.card-code,
.band-label,
.section-label span,
.list-heading p,
.impact-year {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--fg-subtle);
  font-size: 0.78rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(300px, 0.9fr);
  gap: 1.5rem;
  align-items: start;
}

.hero-copy,
.hero-panel,
.note-card,
.theme-card,
.surface-card,
.cta-panel {
  border: 1px solid var(--border-default);
  background: linear-gradient(180deg, var(--surface-top), var(--surface-bottom));
  box-shadow: var(--shadow-soft);
}

.hero-copy {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 2rem;
  border-radius: 1.5rem;
}

.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -20% -20% auto;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(circle, var(--hero-glow), transparent 70%);
  pointer-events: none;
}

.kicker {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.78rem;
}

h1,
h2,
h3,
.pub-title {
  margin: 0;
  line-height: 1.06;
}

h1 {
  max-width: 12ch;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 7vw, 6.4rem);
  letter-spacing: -0.05em;
}

.hero-title {
  margin: 1.25rem 0 0;
  max-width: 38rem;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  color: var(--fg-default);
}

.hero-lede,
.section-heading p,
.note-card p {
  max-width: var(--content-width);
  color: var(--fg-muted);
  font-size: 1.04rem;
}

.hero-lede {
  margin: 1.15rem 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.bio-summary {
  margin-top: 1.4rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--border-default);
}

.bio-summary p {
  margin: 0;
  max-width: 62ch;
  color: var(--fg-muted);
  font-size: 0.98rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.9rem;
  padding: 0.75rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--border-default);
  font-weight: 500;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
}

.button-small {
  min-height: 2.6rem;
  padding-inline: 0.95rem;
}

.button-primary {
  border-color: var(--button-primary-border);
  background: linear-gradient(180deg, var(--button-primary-top), var(--button-primary-bottom));
}

.button-secondary,
.button-ghost {
  background: var(--button-ghost-bg);
}

.hero-panel {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  padding: 1.4rem;
  border-radius: 1.35rem;
  background: linear-gradient(180deg, var(--panel-top), var(--panel-bottom));
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-default);
}

.panel-tag {
  color: var(--accent);
  font-size: 0.78rem;
}

.panel-code {
  color: var(--fg-subtle);
  font-size: 0.78rem;
}

.portrait-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--border-default);
  border-radius: 1rem;
  background:
    radial-gradient(circle at top, var(--portrait-frame-top), transparent 45%),
    linear-gradient(180deg, var(--surface-top), var(--portrait-frame-bottom));
}

.portrait-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      var(--portrait-overlay-top),
      var(--portrait-overlay-mid) 68%,
      var(--portrait-overlay-bottom)
    );
  pointer-events: none;
}

.hero-portrait {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

html[data-theme="dark"] .hero-portrait-light {
  display: none;
}

html[data-theme="light"] .hero-portrait-dark {
  display: none;
}

.hero-facts {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.hero-facts dt {
  margin-bottom: 0.2rem;
  color: var(--fg-subtle);
  font-size: 0.92rem;
}

.hero-facts dd {
  margin: 0;
  color: var(--fg-default);
  font-size: 1rem;
}

.fact-bullets {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--fg-default);
}

.fact-bullets li + li {
  margin-top: 0.55rem;
}

.fact-degrees li + li {
  margin-top: 0.8rem;
}

.degree-name,
.degree-institution {
  display: block;
}

.degree-institution {
  margin-top: 0.12rem;
  padding-left: 0.75rem;
  color: var(--fg-muted);
  font-size: 0.96rem;
}

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

.hero-bands > div {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  min-height: 5.2rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border-default);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.025);
}

.band-label {
  color: var(--fg-subtle);
  font-size: 0.82rem;
}

.band-text {
  font-size: 0.96rem;
  color: var(--fg-default);
}

.section-shell {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1.6rem;
  padding: 2.25rem 0 0;
}

.section-label {
  padding-top: 0.2rem;
  border-top: 1px solid var(--border-default);
}

.section-label span {
  display: block;
  color: var(--accent);
  font-size: 0.82rem;
}

.section-label p {
  margin: 0.4rem 0 0;
  color: var(--fg-muted);
}

.section-body {
  display: grid;
  gap: 1.4rem;
}

.section-body-wide {
  grid-template-columns: minmax(0, 1fr);
}

.section-heading {
  display: grid;
  gap: 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-default);
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.4rem);
  letter-spacing: -0.04em;
}

.note-card,
.theme-card,
.surface-card {
  padding: 1.35rem;
  border-radius: 1.2rem;
}

.note-card p {
  margin: 0;
}

.note-card h3 {
  margin: 0.2rem 0 0;
  font-size: 1.35rem;
}

.note-card-text {
  margin-top: 0.55rem;
  color: var(--fg-muted);
}

.external-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.15rem;
}

.external-link {
  display: grid;
  gap: 0.3rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border-default);
  border-radius: 0.95rem;
  background: var(--button-ghost-bg);
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.external-link:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
}

.external-link-label {
  color: var(--fg-default);
  font-weight: 500;
}

.external-link-url {
  color: var(--fg-subtle);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

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

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

.card-code {
  margin: 0 0 0.8rem;
  color: var(--fg-subtle);
  font-size: 0.76rem;
}

.theme-card h3,
.surface-card h3,
.impact-item h3,
.cta-panel h3,
.list-heading h3 {
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
}

.impact-link {
  text-decoration: none;
}

.impact-link:hover {
  color: var(--accent);
}

.theme-card p:last-child,
.surface-card p:last-child,
.impact-item p,
.cta-panel p,
.list-heading p {
  margin: 0;
  color: var(--fg-muted);
}

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

.list-heading h3 {
  font-size: 1.35rem;
}

.publication-list,
.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.publication-list {
  display: grid;
  gap: 0.95rem;
}

.publication-list li {
  display: grid;
  grid-template-columns: 4.3rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-default);
}

.pub-year {
  color: var(--fg-subtle);
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.pub-title {
  font-size: 1.03rem;
  line-height: 1.35;
}

.pub-title-link {
  display: inline-block;
}

.pub-title-link:hover .pub-title {
  color: var(--accent);
}

.pub-meta {
  margin: 0.28rem 0 0;
  color: var(--fg-muted);
}

.plain-list {
  display: grid;
  gap: 0.85rem;
}

.plain-list li {
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-default);
  color: var(--fg-default);
}

.metrics-panel {
  display: grid;
  gap: 1rem;
  padding: 1.35rem;
  border: 1px solid var(--border-default);
  border-radius: 1.2rem;
  background: linear-gradient(180deg, var(--surface-top), var(--surface-bottom));
  box-shadow: var(--shadow-soft);
}

.metrics-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-default);
}

.metrics-head h3 {
  margin-top: 0.25rem;
  font-size: 1.15rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.metric-card {
  padding: 1rem 1.05rem;
  border: 1px solid var(--border-default);
  border-radius: 1rem;
  background: var(--button-ghost-bg);
}

.metric-label {
  margin: 0;
  color: var(--fg-subtle);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.metric-value {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.05em;
  line-height: 0.95;
}

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

.impact-item {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-default);
}

.impact-year {
  color: var(--accent);
  font-size: 0.76rem;
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.4rem;
  padding: 1.35rem;
  border-radius: 1.2rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--border-default);
  color: var(--fg-subtle);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .card-grid,
  .split-grid,
  .external-links,
  .hero-bands,
  .metrics-grid,
  .section-shell {
    grid-template-columns: 1fr;
  }

  .section-label {
    padding-top: 0;
  }

  .impact-item,
  .publication-list li,
  .site-footer,
  .cta-panel {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .impact-item {
    gap: 0.35rem;
  }

  .metrics-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header {
    flex-wrap: wrap;
  }

  .header-actions {
    margin-left: auto;
  }

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

@media (max-width: 640px) {
  .page-shell {
    width: min(calc(100% - 1.2rem), var(--page-width));
  }

  .hero {
    padding-top: 2.1rem;
  }

  .hero-copy,
  .hero-panel,
  .note-card,
  .theme-card,
  .surface-card,
  .cta-panel {
    padding: 1.1rem;
    border-radius: 1rem;
  }

  .site-nav {
    flex-wrap: wrap;
    border-radius: 1rem;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

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

  .hero-actions {
    width: 100%;
  }
}

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

  .button {
    transition: none;
  }
}