:root {
  color-scheme: light;
  --bg: #ffffff;
  --paper: #ffffff;
  --ink: #1b1b1b;
  --muted: #666666;
  --soft: #f7f7f7;
  --line: #dddddd;
  --link: #2462a8;
  --link-hover: #143f72;
  --button: #f0f0f0;
  --button-border: #cfcfcf;
  --toggle-glow: rgba(36, 98, 168, 0.22);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111315;
  --paper: #111315;
  --ink: #e9edf1;
  --muted: #aab2bd;
  --soft: #1a1e22;
  --line: #30363d;
  --link: #8ab4f8;
  --link-hover: #b8d2ff;
  --button: #1f252b;
  --button-border: #3a424c;
  --toggle-glow: rgba(138, 180, 248, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  margin: 0;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.skip-link {
  left: 1rem;
  position: absolute;
  top: -4rem;
}

.skip-link:focus {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 0.35rem 0.6rem;
  top: 1rem;
  z-index: 10;
}

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  align-items: center;
  display: grid;
  gap: 1rem;
  grid-template-columns: auto 1fr auto auto;
  margin: 0 auto;
  max-width: 980px;
  padding: 0.85rem 1rem;
}

.brand {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.93rem;
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.theme-toggle,
.nav-toggle {
  align-items: center;
  background: var(--button);
  border: 1px solid var(--button-border);
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  height: 2rem;
  justify-content: center;
}

.theme-toggle {
  border-radius: 50%;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
  height: 2.25rem;
  overflow: hidden;
  padding: 0;
  position: relative;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
  width: 2.25rem;
}

.theme-toggle:hover {
  border-color: var(--link);
  box-shadow: 0 0 0 4px var(--toggle-glow);
  transform: translateY(-1px);
}

.theme-toggle:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

.theme-icon {
  display: block;
  font-size: 1.05rem;
  line-height: 1;
  transform: translateY(-1px);
  transition: transform 180ms ease;
}

.theme-toggle:hover .theme-icon {
  transform: translateY(-1px) rotate(-12deg) scale(1.08);
}

:root[data-theme="dark"] .theme-toggle:hover .theme-icon {
  transform: translateY(-1px) rotate(12deg) scale(1.08);
}

.nav-toggle {
  border-radius: 3px;
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0;
  width: 2rem;
}

.nav-toggle span {
  background: var(--ink);
  display: block;
  height: 2px;
  width: 1rem;
}

.page-shell {
  display: grid;
  gap: 2.4rem;
  grid-template-columns: minmax(0, 1fr) 245px;
  margin: 0 auto;
  max-width: 980px;
  padding: 2.5rem 1rem 1rem;
}

.profile-panel {
  align-self: start;
  grid-column: 2;
  grid-row: 1;
  padding-top: 0.25rem;
  position: sticky;
  text-align: center;
  top: 1.25rem;
}

.content-panel {
  grid-column: 1;
  grid-row: 1;
}

.profile-photo {
  border: 1px solid var(--line);
  display: block;
  margin: 0 auto 0.9rem;
  max-width: 220px;
  width: 100%;
}

.profile-panel h1 {
  font-size: 1.45rem;
  line-height: 1.15;
  margin: 0 0 0.35rem;
}

.role,
.focus,
.location {
  color: var(--muted);
  margin: 0 0 0.25rem;
}

.role {
  color: var(--ink);
  font-weight: 600;
}

.focus {
  font-size: 0.9rem;
}

.location {
  font-size: 0.88rem;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin-top: 0.9rem;
}

.profile-links a {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--link);
  font-size: 0.78rem;
  line-height: 1;
  padding: 0.35rem 0.45rem;
}

.single-column {
  margin: 0 auto;
  max-width: 980px;
  padding: 2.5rem 1rem 1rem;
}

.single-column h1,
.content-panel h2:first-of-type {
  font-size: 1.95rem;
  line-height: 1.18;
  margin-top: 0;
}

.eyebrow,
.meta {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--ink);
  font-weight: 650;
}

h2 {
  border-bottom: 1px solid var(--line);
  font-size: 1.45rem;
  line-height: 1.25;
  margin: 2rem 0 0.9rem;
  padding-bottom: 0.25rem;
}

h3 {
  font-size: 1.03rem;
  line-height: 1.35;
  margin: 0 0 0.25rem;
}

p {
  margin: 0 0 0.9rem;
}

.lede {
  color: var(--muted);
  font-size: 1rem;
  max-width: 760px;
}

.notice {
  background: var(--soft);
  border-left: 3px solid var(--line);
  margin-top: 0.5rem;
  padding: 0.75rem 0.9rem;
}

.section-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.4rem;
}

.plain-list {
  margin: 0;
  padding-left: 1.25rem;
}

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

.timeline article,
.project-card,
.publication-list article,
.research-table article,
.section-grid article {
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

.timeline span {
  color: var(--muted);
  display: block;
  font-size: 0.86rem;
  margin-bottom: 0.18rem;
}

.card-list,
.publication-list {
  margin-top: 1.4rem;
}

.project-card {
  align-items: start;
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr) auto;
}

.featured-project {
  background: var(--soft);
  border: 1px solid var(--line);
  padding: 0.9rem;
}

.text-link {
  font-size: 0.9rem;
  white-space: nowrap;
}

.research-table {
  display: grid;
  gap: 0.95rem 1.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 1.6rem 0;
}

.section-heading {
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin-top: 2rem;
}

.section-heading h2 {
  border: 0;
  margin: 0;
}

.contact-layout {
  max-width: 760px;
}

.contact-list {
  display: grid;
  gap: 0;
  margin-top: 1.5rem;
}

.contact-list a {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 155px minmax(0, 1fr);
  padding: 0.75rem 0;
}

.contact-list span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  margin: 2rem auto 0;
  max-width: 980px;
  padding: 1rem;
}

@media (max-width: 760px) {
  .header-inner {
    grid-template-columns: 1fr auto auto;
  }

  .site-nav {
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    display: none;
    flex-wrap: wrap;
    justify-content: flex-start;
    left: 0;
    padding: 0.85rem 1rem;
    position: absolute;
    right: 0;
    top: 3.75rem;
  }

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

  .nav-toggle {
    display: inline-flex;
  }

  .page-shell {
    gap: 1.8rem;
    grid-template-columns: 1fr;
    padding-top: 1.6rem;
  }

  .profile-panel,
  .content-panel {
    grid-column: 1;
    grid-row: auto;
  }

  .profile-panel {
    position: static;
    text-align: left;
  }

  .profile-photo {
    margin-left: 0;
    max-width: 190px;
  }

  .profile-links {
    justify-content: flex-start;
  }

  .section-grid,
  .research-table,
  .project-card,
  .contact-list a {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.25rem;
  }

  .text-link {
    white-space: normal;
  }
}