:root {
  color-scheme: light;
  --bg: #edf3f2;
  --surface: #e2ece9;
  --surface-hover: rgba(15, 118, 110, 0.08);
  --heading: #102a43;
  --text: #4b6274;
  --subtle: #607687;
  --line: rgba(16, 42, 67, 0.16);
  --accent: #0f766e;
  --accent-soft: rgba(15, 118, 110, 0.11);
  --focus: #0f766e;
  --image-border: rgba(16, 42, 67, 0.2);
  --font: "Avenir Next", Avenir, "Helvetica Neue", Arial, sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #162238;
  --surface-hover: rgba(30, 41, 59, 0.72);
  --heading: #e2e8f0;
  --text: #94a3b8;
  --subtle: #8190a5;
  --line: rgba(148, 163, 184, 0.2);
  --accent: #5eead4;
  --accent-soft: rgba(94, 234, 212, 0.1);
  --focus: #5eead4;
  --image-border: rgba(226, 232, 240, 0.15);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 0;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 22% 12%, var(--accent-soft), transparent 34rem);
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }

::selection {
  color: var(--bg);
  background: var(--accent);
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--bg);
  background: var(--accent);
  border-radius: 6px;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus { transform: none; }

.page-shell {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(520px, 1.1fr);
  gap: clamp(56px, 7vw, 112px);
  width: min(100% - 96px, 1240px);
  min-height: 100dvh;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100dvh;
  padding: 92px 0 52px;
}

.identity {
  display: inline-block;
  text-decoration: none;
}

.identity h1 {
  margin: 0;
  color: var(--heading);
  font-size: clamp(40px, 4vw, 52px);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1;
}

.role {
  margin: 16px 0 0;
  color: var(--heading);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.intro {
  max-width: 390px;
  margin: 16px 0 0;
  color: var(--subtle);
  font-size: 16px;
  line-height: 1.55;
}

.side-nav {
  display: grid;
  gap: 14px;
  width: 180px;
  margin-top: 56px;
}

.side-nav a {
  display: flex;
  align-items: center;
  gap: 16px;
  width: max-content;
  color: var(--subtle);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.side-nav a::before {
  content: "";
  width: 32px;
  height: 1px;
  background: currentColor;
  transition: width 180ms ease;
}

.side-nav a:hover,
.side-nav a:focus-visible,
.side-nav a.active {
  color: var(--heading);
}

.side-nav a:hover::before,
.side-nav a:focus-visible::before,
.side-nav a.active::before { width: 64px; }

.sidebar-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
}

.sidebar-footer a,
.theme-toggle {
  padding: 0;
  color: var(--subtle);
  background: none;
  border: 0;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
  transition: color 160ms ease, transform 160ms ease;
}

.sidebar-footer a:hover,
.sidebar-footer a:focus-visible,
.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: var(--accent);
  transform: translateY(-1px);
}

.content { padding: 96px 0 52px; }

.section {
  scroll-margin-top: 0;
  margin-bottom: 118px;
}

.mobile-section-heading {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.about-copy p {
  max-width: 64ch;
  margin: 0 0 20px;
}

.about-copy strong {
  color: var(--heading);
  font-weight: 600;
}

.evidence {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin: 44px 0 0;
  padding: 28px 0 0;
  border-top: 1px solid var(--line);
}

.evidence div { min-width: 0; }

.evidence dt {
  color: var(--heading);
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
}

.evidence dd {
  margin: 9px 0 0;
  color: var(--subtle);
  font-size: 12px;
  line-height: 1.45;
}

.senior-profile {
  margin-top: 64px;
}

.senior-profile > h2,
.cross-domain-work > h2 {
  margin: 0 0 24px;
  color: var(--heading);
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.025em;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px 34px;
}

.profile-grid article {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.profile-grid .profile-feature--wide {
  grid-column: 1 / -1;
}

.profile-grid h3 {
  margin: 0;
  color: var(--heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.profile-grid p {
  margin: 8px 0 0;
  color: var(--subtle);
  font-size: 13px;
  line-height: 1.6;
}

.entry-list,
.project-list,
.publication-list,
.tags {
  margin: 0;
  padding: 0;
  list-style: none;
}

.entry-list,
.project-list { display: grid; gap: 8px; }

.entry,
.project-entry {
  display: grid;
  gap: 20px;
  padding: 22px;
  margin: 0 -22px;
  border-radius: 12px;
  transition: background-color 180ms ease, transform 180ms ease;
}

.entry { grid-template-columns: 116px minmax(0, 1fr); }
.project-entry { grid-template-columns: 176px minmax(0, 1fr); }

.entry:hover,
.entry:focus-within,
.project-entry:hover,
.project-entry:focus-within {
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.entry-date {
  margin: 2px 0 0;
  color: var(--subtle);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.entry h3,
.project-entry h3,
.education h3,
.publication-list h3,
.contact h2 {
  margin: 0;
  color: var(--heading);
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.018em;
  line-height: 1.4;
  transition: color 160ms ease;
}

.entry h3 span { color: var(--subtle); }

.entry:hover h3,
.project-entry:hover h3,
.publication-list a:hover h3 { color: var(--accent); }

.entry-body > p,
.project-body > p {
  margin: 9px 0 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
}

.project-body .project-proof {
  color: var(--subtle);
  font-size: 12px;
  line-height: 1.55;
}

.project-proof strong {
  color: var(--heading);
  font-weight: 700;
}

.project-proof a {
  color: var(--heading);
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  transition: color 160ms ease;
}

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

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 14px;
}

.tags li {
  padding: 4px 11px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 650;
  line-height: 1.5;
}

.inline-link {
  display: inline-block;
  color: var(--heading);
  font-size: 14px;
  font-weight: 700;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  transition: color 160ms ease;
}

.inline-link:hover,
.inline-link:focus-visible { color: var(--accent); }

.education {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.education article > p {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}

.education article > span {
  display: block;
  margin-top: 8px;
  color: var(--subtle);
  font-size: 13px;
  line-height: 1.5;
}

.project-image {
  overflow: hidden;
  align-self: start;
  aspect-ratio: 4 / 3;
  padding: 0;
  margin-top: 3px;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--image-border);
  border-radius: 6px;
  cursor: zoom-in;
  font: inherit;
  text-align: inherit;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
  transition: filter 180ms ease, transform 240ms ease;
}

.project-image--diagram,
.project-image--map {
  background: #f3f6f1;
}

.project-image--diagram img,
.project-image--map img {
  object-fit: contain;
  padding: 5px;
}

.project-entry:hover img {
  filter: saturate(1) contrast(1);
  transform: scale(1.025);
}

.cross-domain-work {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.cross-domain-list {
  display: grid;
  gap: 8px;
}

.cross-domain-list .project-entry {
  grid-template-columns: minmax(210px, 0.72fr) minmax(0, 1.28fr);
  gap: 26px;
  padding-block: 26px;
}

.image-lightbox {
  grid-template-rows: auto minmax(0, 1fr);
  width: min(92vw, 1440px);
  max-width: none;
  height: min(90dvh, 1000px);
  max-height: none;
  padding: 0;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--image-border);
  border-radius: 12px;
  box-shadow: 0 28px 90px rgba(2, 12, 27, 0.32);
}

.image-lightbox[open] { display: grid; }

.image-lightbox::backdrop {
  background: rgba(2, 12, 27, 0.78);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.lightbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.lightbox-toolbar p {
  overflow: hidden;
  margin: 0;
  color: var(--heading);
  font-size: 14px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lightbox-close {
  flex: 0 0 auto;
  padding: 7px 12px;
  color: var(--heading);
  background: var(--surface);
  border: 1px solid var(--image-border);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  transition: color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  color: var(--accent);
  background: var(--surface-hover);
}

.lightbox-close:active { transform: translateY(1px); }

.lightbox-figure {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-height: 0;
  margin: 0;
  padding: 18px;
}

.lightbox-figure img {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: contain;
  background: var(--surface);
  border: 1px solid var(--image-border);
  border-radius: 6px;
}

.lightbox-figure img.lightbox-image--light {
  background: #f3f6f1;
}

.lightbox-figure figcaption {
  margin-top: 10px;
  color: var(--subtle);
  font-size: 12px;
  line-height: 1.5;
}

.publication-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.publication-list a,
.publication-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  height: 100%;
  padding: 18px;
  margin: 0 -18px;
  border-radius: 12px;
  text-decoration: none;
  transition: background-color 180ms ease, transform 180ms ease;
}

.publication-list a:hover,
.publication-list a:focus-visible {
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.publication-list a > span,
.publication-item > span {
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}

.publication-list h3 { font-size: 14px; }

.publication-list p {
  margin: 8px 0 0;
  color: var(--subtle);
  font-size: 12px;
  line-height: 1.5;
}

.contact {
  max-width: 560px;
  scroll-margin-top: 96px;
  margin: 12px 0 120px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.contact h2 {
  font-size: clamp(26px, 4vw, 38px);
  letter-spacing: -0.045em;
}

.contact p {
  max-width: 54ch;
  margin: 18px 0 20px;
}

.site-footer {
  display: flex;
  justify-content: flex-end;
  gap: 24px;
  padding-top: 24px;
  color: var(--subtle);
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.site-footer a {
  color: var(--subtle);
  text-decoration: none;
}

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

@media (max-width: 980px) {
  .page-shell {
    display: block;
    width: min(100% - 64px, 760px);
  }

  .sidebar {
    position: static;
    height: auto;
    min-height: 620px;
    padding: 84px 0 48px;
  }

  .identity h1 { font-size: clamp(44px, 10vw, 64px); }
  .intro { max-width: 440px; }
  .side-nav { display: none; }
  .sidebar-footer { margin-top: 72px; }
  .content { padding: 0 0 40px; }
  .section { scroll-margin-top: 74px; margin-bottom: 92px; }

  .mobile-section-heading {
    position: sticky;
    top: 0;
    z-index: 5;
    width: calc(100% + 64px);
    height: auto;
    margin: 0 0 32px -32px;
    padding: 18px 32px;
    overflow: visible;
    clip: auto;
    color: var(--heading);
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    white-space: normal;
  }

  .mobile-section-heading h2 {
    margin: 0;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
}

@media (max-width: 640px) {
  .page-shell { width: min(100% - 40px, 560px); }

  .sidebar {
    min-height: 560px;
    padding-top: 72px;
  }

  .identity h1 { font-size: clamp(40px, 12vw, 52px); }
  .role { font-size: 18px; }
  .intro { font-size: 15px; }

  .mobile-section-heading {
    width: calc(100% + 40px);
    margin-left: -20px;
    padding-inline: 20px;
  }

  .evidence { grid-template-columns: 1fr; gap: 20px; }

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

  .entry,
  .project-entry {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 18px;
    margin: 0 -18px;
  }

  .project-entry { gap: 18px; }

  .cross-domain-list .project-entry {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-block: 22px;
  }

  .project-image {
    aspect-ratio: 16 / 9;
    order: 2;
  }

  .project-body { order: 1; }

  .image-lightbox {
    width: calc(100vw - 24px);
    height: calc(100dvh - 24px);
  }

  .lightbox-toolbar { padding: 12px; }
  .lightbox-figure { padding: 12px; }
  .education { grid-template-columns: 1fr; gap: 28px; }
  .publication-list { grid-template-columns: 1fr; }

}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .mobile-section-heading {
    background: var(--bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .image-lightbox::backdrop {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}