:root {
  --navy: #173b63;
  --navy-dark: #0d2a49;
  --ink: #18212b;
  --muted: #5c6875;
  --line: #d9dee5;
  --paper: #ffffff;
  --sidebar: #f3f5f7;
  --soft-blue: #eef4f9;
  --gold: #b97812;
  --green: #28734e;
  --red: #a23b3b;
  --violet: #6b4b8a;
  --surface: #fafbfc;
  --surface-hover: #eef4f9;
  --nav-hover: rgba(255, 255, 255, 0.72);
  --on-accent: #ffffff;
  --contact-bg: #0d2a49;
  --contact-text: #ffffff;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --content: 1080px;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --navy: #8fc3f1;
  --navy-dark: #e4edf6;
  --ink: #e5eaf0;
  --muted: #aeb8c4;
  --line: #344452;
  --paper: #10171f;
  --sidebar: #17222c;
  --soft-blue: #1b2c3a;
  --gold: #e5ad51;
  --green: #70c796;
  --red: #ef8a8a;
  --violet: #c2a0e0;
  --surface: #151f28;
  --surface-hover: #1b2c3a;
  --nav-hover: rgba(143, 195, 241, 0.1);
  --on-accent: #0d2a49;
  --contact-bg: #203b55;
  --contact-text: #f5f8fb;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  transition: color 180ms ease, background-color 180ms ease;
}

a {
  color: var(--navy);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--navy-dark);
  text-decoration-thickness: 2px;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(23, 59, 99, 0.32);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.55rem 0.8rem;
  color: white;
  background: var(--navy-dark);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-shell {
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 10;
  display: flex;
  width: 225px;
  flex-direction: column;
  padding: 2rem 1.6rem;
  overflow-y: auto;
  background: var(--sidebar);
  border-right: 1px solid var(--line);
}

.site-mark {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  margin-bottom: 2.5rem;
  color: var(--navy-dark);
  text-decoration: none;
}

.site-mark__monogram {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  place-items: center;
  color: var(--on-accent);
  background: var(--navy);
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1;
}

.site-mark__name {
  font-family: var(--serif);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.08;
}

.nav-list {
  display: grid;
  gap: 0.15rem;
}

.nav-link {
  display: block;
  padding: 0.42rem 0.65rem;
  color: var(--navy-dark);
  border-left: 2px solid transparent;
  font-family: var(--serif);
  font-size: 1.03rem;
  text-decoration: none;
}

.nav-link:hover,
.nav-link.is-active {
  background: var(--nav-hover);
  border-left-color: var(--navy);
}

.theme-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.5rem;
  padding: 0.55rem 0.65rem;
  color: var(--navy-dark);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
  font: 700 0.78rem/1.2 var(--sans);
  letter-spacing: 0.025em;
}

.theme-toggle:hover {
  background: var(--nav-hover);
}

.theme-toggle__icon {
  font-size: 1rem;
  line-height: 1;
}

.sidebar-links {
  display: grid;
  gap: 0.42rem;
  margin-top: auto;
  padding-top: 2.5rem;
  font-size: 0.79rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.sidebar-links a {
  color: var(--muted);
  text-decoration: none;
}

.sidebar-links a:hover {
  color: var(--navy);
}

.main-column {
  width: calc(100% - 225px);
  max-width: calc(var(--content) + 225px);
  margin-left: 225px;
  padding: 0 4.5rem;
}

.section-block {
  padding: 5.25rem 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 1rem;
}

.page-main {
  min-height: 100vh;
}

.page-header {
  padding: 4.5rem 0 2.4rem;
  border-bottom: 3px double #aeb7c2;
}

.page-header h1 {
  max-width: 900px;
  margin-bottom: 0.8rem;
  font-size: clamp(2.15rem, 4.5vw, 3.35rem);
}

.page-header > p:last-child,
.page-header > div > p:last-child {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.page-header--split {
  display: flex;
  gap: 2rem;
  align-items: end;
  justify-content: space-between;
}

.hero {
  padding-top: 3.4rem;
}

.hero-heading {
  padding-bottom: 1.25rem;
  border-bottom: 3px double #aeb7c2;
}

.eyebrow,
.section-number {
  margin: 0 0 0.35rem;
  color: var(--gold);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  line-height: 1.3;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--navy-dark);
  font-family: var(--serif);
}

h1 {
  margin-bottom: 0.15rem;
  font-size: clamp(2.2rem, 5vw, 3.55rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
}

h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.018em;
}

h3 {
  font-size: 1.22rem;
  line-height: 1.35;
}

.role,
.affiliation {
  margin: 0;
  font-family: var(--serif);
  line-height: 1.4;
}

.role {
  margin-top: 0.45rem;
  color: var(--ink);
  font-size: 1.18rem;
}

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

.affiliation a {
  color: inherit;
}

.profile-grid {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 2.3rem;
  align-items: start;
  padding-top: 2.1rem;
}

.portrait-wrap {
  margin: 0;
  padding: 0.45rem;
  background: var(--paper);
  border: 1px solid #cdd4dc;
}

.portrait {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  object-position: center top;
  background: var(--soft-blue);
}

.profile-copy p {
  margin-bottom: 0.9rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0.48rem 1rem;
  color: var(--navy-dark);
  background: var(--paper);
  border: 1px solid var(--navy);
  border-radius: 3px;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.button:hover {
  color: var(--on-accent);
  background: var(--navy-dark);
}

.button--primary {
  color: var(--on-accent);
  background: var(--navy);
}

.section-heading {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 1.6rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #aeb7c2;
}

.section-heading .section-number {
  margin: 0;
}

.section-heading--split {
  justify-content: space-between;
  align-items: end;
}

.section-heading--split > div {
  display: flex;
  gap: 1rem;
  align-items: baseline;
}

.text-link {
  flex: 0 0 auto;
  font-size: 0.86rem;
  font-weight: 700;
}

.section-intro {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.05rem;
}

.interest-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 2rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.interest-grid li {
  display: block;
  padding: 0.95rem 1rem 0.95rem 0;
  border-bottom: 1px solid var(--line);
}

.interest-grid li:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.interest-grid li:nth-child(even) {
  padding-left: 1rem;
}

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

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

.directory-card {
  display: flex;
  min-height: 180px;
  flex-direction: column;
  padding: 1.25rem 1.35rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  text-decoration: none;
}

.directory-card:hover {
  color: var(--ink);
  background: var(--surface-hover);
  border-color: var(--navy);
}

.directory-card span {
  margin-bottom: auto;
  color: var(--gold);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.directory-card strong {
  margin: 1.8rem 0 0.3rem;
  color: var(--navy-dark);
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.35;
}

.directory-card small {
  color: var(--muted);
  font-size: 0.83rem;
  line-height: 1.5;
}

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

.focus-grid article {
  padding: 1.2rem;
  background: var(--surface);
  border-top: 3px solid var(--navy);
}

.focus-grid h3 {
  margin-bottom: 0.65rem;
}

.focus-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

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

.resource-list li {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
}

.resource-list span {
  color: var(--muted);
  font-family: var(--serif);
  font-size: 0.9rem;
}

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

.contact-card > div {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
}

.contact-card h2 {
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
}

.contact-card p {
  margin-bottom: 0;
}

.news-list li {
  display: grid;
  grid-template-columns: 6.1rem minmax(0, 1fr);
  gap: 1.2rem;
  padding: 0.72rem 0;
  border-bottom: 1px dotted #c8ced6;
}

.news-list li:last-child {
  border-bottom: 0;
}

.news-list time {
  color: var(--muted);
  font-family: var(--serif);
  font-variant-numeric: tabular-nums;
}

.news-list p {
  margin: 0;
}

.news-tag {
  display: inline-block;
  min-width: 3.45rem;
  margin-right: 0.35rem;
  font-size: 0.78rem;
  font-weight: 800;
}

.news-tag--paper {
  color: var(--green);
}

.news-tag--talk {
  color: var(--red);
}

.news-tag--award {
  color: var(--gold);
}

.news-tag--career {
  color: var(--violet);
}

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

.publication {
  position: relative;
  padding: 1.35rem 1.45rem 1.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid #aeb7c2;
}

.publication--featured {
  background: linear-gradient(90deg, var(--soft-blue), var(--paper) 70%);
  border-left-color: var(--navy);
}

.publication-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.45rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.venue {
  color: var(--navy);
}

.publication h3 {
  margin-bottom: 0.45rem;
}

.authors {
  margin-bottom: 0.55rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.authors strong {
  color: var(--ink);
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 0;
  font-size: 0.84rem;
  font-weight: 700;
}

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

.presentation {
  display: flex;
  min-height: 110px;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem 1.1rem;
  color: var(--navy-dark);
  background: var(--surface);
  border: 1px solid var(--line);
  text-decoration: none;
}

.presentation:hover {
  background: var(--surface-hover);
  border-color: #aebed0;
}

.presentation span {
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.presentation strong {
  font-family: var(--serif);
  line-height: 1.35;
}

.archive {
  margin-top: 1.25rem;
  padding: 0.9rem 1rem;
  background: var(--sidebar);
  border: 1px solid var(--line);
}

.archive summary {
  cursor: pointer;
  color: var(--navy);
  font-weight: 700;
}

.archive ul {
  margin-bottom: 0;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 0.8fr);
  gap: 3rem;
  align-items: end;
}

.contact {
  padding-right: 2rem;
  padding-left: 2rem;
  background: var(--contact-bg);
}

.contact h2,
.contact p,
.contact a,
.contact-links {
  color: var(--contact-text);
}

.contact h2 {
  margin-bottom: 0.9rem;
}

.contact p {
  max-width: 610px;
  margin-bottom: 0;
}

.contact-links {
  display: grid;
  gap: 0.25rem;
  justify-items: end;
  color: var(--muted);
  font-size: 0.93rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.4rem 0 2.5rem;
  color: #87919d;
  font-size: 0.72rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .sidebar {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    gap: 1rem;
    align-items: center;
    padding: 0.8rem 1.2rem;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .site-mark {
    flex: 0 0 auto;
    margin: 0 0.8rem 0 0;
  }

  .site-mark__monogram {
    width: 36px;
    height: 36px;
    flex-basis: 36px;
  }

  .site-mark__name,
  .sidebar-links {
    display: none;
  }

  .theme-toggle {
    width: auto;
    flex: 0 0 auto;
    margin: 0 0 0 auto;
  }

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

  .nav-list {
    display: flex;
    gap: 0.25rem;
  }

  .nav-link {
    padding: 0.35rem 0.55rem;
    border-left: 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }

  .nav-link:hover,
  .nav-link.is-active {
    border-bottom-color: var(--navy);
  }

  .main-column {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
    padding: 0 2.2rem;
  }

  .section-block {
    scroll-margin-top: 72px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .sidebar {
    padding-inline: 0.85rem;
  }

  .site-mark {
    margin-right: 0.25rem;
  }

  .nav-link {
    font-size: 0.94rem;
  }

  .main-column {
    padding: 0 1.1rem;
  }

  .section-block {
    padding: 3.7rem 0;
  }

  .hero {
    padding-top: 2.2rem;
  }

  .profile-grid,
  .contact,
  .page-header--split {
    grid-template-columns: 1fr;
  }

  .page-header--split {
    display: grid;
    align-items: start;
  }

  .portrait-wrap {
    width: min(200px, 58vw);
  }

  .interest-grid,
  .presentation-grid,
  .directory-grid,
  .focus-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .resource-list li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .interest-grid li:nth-child(odd) {
    border-right: 0;
  }

  .interest-grid li:nth-child(even) {
    padding-left: 0;
  }

  .section-heading--split,
  .section-heading--split > div {
    align-items: baseline;
  }

  .news-list li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .contact-links {
    justify-items: start;
  }

  .site-footer {
    flex-direction: column;
    gap: 0.2rem;
  }
}

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

  body {
    transition: none;
  }
}

@media print {
  .sidebar,
  .hero-actions,
  .site-footer {
    display: none;
  }

  .main-column {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .section-block {
    padding: 1.5rem 0;
    break-inside: avoid;
  }
}