:root {
  --bg: #f5f7f8;
  --bg-elevated: #eef2f4;
  --surface: #ffffff;
  --text: #132230;
  --text-muted: #465a6d;
  --border: #c9d3db;
  --accent: #0d6b78;
  --accent-strong: #0a505a;
  --focus: #f2a800;
  --header-bg: rgba(245, 247, 248, 0.92);
  --shadow: 0 10px 24px rgba(19, 34, 48, 0.08);
}

:root[data-theme="dark"] {
  --bg: #0e161e;
  --bg-elevated: #15222d;
  --surface: #1b2b38;
  --text: #eaf1f7;
  --text-muted: #b4c3d1;
  --border: #355063;
  --accent: #4fc4d3;
  --accent-strong: #90e3ed;
  --focus: #ffd166;
  --header-bg: rgba(14, 22, 30, 0.88);
  --shadow: 0 16px 28px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 5%, rgba(79, 196, 211, 0.18), transparent 30%),
    radial-gradient(circle at 95% 10%, rgba(13, 107, 120, 0.12), transparent 32%),
    var(--bg);
  font-family: "Source Sans 3", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
  font-family: "Space Grotesk", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.18em;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

img {
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.5rem 0.8rem;
  border-radius: 0.5rem;
  z-index: 1000;
}

.skip-link:focus {
  top: 0.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: blur(8px);
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.nav-wrapper {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand:hover {
  color: var(--accent-strong);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  padding: 0.38rem 0.55rem;
  border-radius: 0.5rem;
}

.site-nav a:hover {
  color: var(--accent-strong);
  background: var(--bg-elevated);
}

.site-nav a[aria-current="page"] {
  background: var(--bg-elevated);
  color: var(--accent-strong);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 0.55rem;
  padding: 0.45rem 0.62rem;
  font-weight: 600;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.65rem;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.01em;
  padding: 0.6rem 1rem;
}

.button.primary {
  background: var(--accent);
  color: #f6feff;
}

.button.primary:hover {
  background: var(--accent-strong);
  color: #ffffff;
}

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

.button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.button.small {
  padding: 0.45rem 0.8rem;
  font-size: 0.94rem;
}

.page-main {
  padding-bottom: 4.5rem;
}

.hero {
  padding: 4.2rem 0 2.4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.2rem;
  align-items: stretch;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: clamp(1.2rem, 3vw, 2rem);
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 0.8rem;
  color: var(--accent-strong);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.76rem;
}

.hero-copy h1 {
  font-size: clamp(1.8rem, 4vw, 2.9rem);
  margin-bottom: 0.7rem;
}

.hero-copy .role {
  color: var(--text-muted);
  font-size: 1.08rem;
  margin-bottom: 0.9rem;
  font-weight: 600;
}

.hero-copy .bio {
  max-width: 58ch;
  color: var(--text-muted);
}

.cta-row {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.62rem;
}

.metrics {
  padding: clamp(1.2rem, 3vw, 2rem);
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.headshot-panel,
.headshot-card {
  padding: 0.9rem;
}

.profile-headshot {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center 20%;
  border-radius: 0.85rem;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.metric {
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--border);
}

.metric:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.metric strong {
  display: block;
  font-size: 1.03rem;
  margin-bottom: 0.25rem;
}

.metric span {
  color: var(--text-muted);
}

.section {
  margin-top: 2.2rem;
}

.section h2 {
  font-size: clamp(1.45rem, 2.5vw, 1.95rem);
  margin-bottom: 0.85rem;
}

.section-intro {
  color: var(--text-muted);
  max-width: 70ch;
  margin-bottom: 1.1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  box-shadow: var(--shadow);
  padding: 1rem;
  display: grid;
  gap: 0.65rem;
}

.project-card-header {
  display: grid;
  gap: 0.2rem;
}

.project-card-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.project-card-title {
  font-size: 1.05rem;
}

.project-card-title a {
  color: var(--text);
  text-decoration: none;
}

.project-card-title a:hover {
  color: var(--accent-strong);
}

.project-card-summary {
  color: var(--text-muted);
}

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag {
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 600;
}

.text-link {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.filter-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  padding: 0.37rem 0.8rem;
}

.filter-chip[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #f6feff;
}

.inline-note {
  border: 1px dashed var(--border);
  border-radius: 0.7rem;
  padding: 0.7rem 0.8rem;
  color: var(--text-muted);
}

.layout-two {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
}

.stack {
  display: grid;
  gap: 0.9rem;
}

.content-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  box-shadow: var(--shadow);
  padding: 1rem;
}

.content-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

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

.content-card ul {
  margin: 0;
  padding-left: 1.05rem;
  display: grid;
  gap: 0.4rem;
}

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.contact-list a {
  text-decoration: none;
  font-weight: 700;
}

.publication-list,
.news-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.85rem;
}

.publication-list li,
.news-list li {
  color: var(--text-muted);
}

.publication-title {
  color: var(--text);
  font-weight: 700;
  margin-bottom: 0.22rem;
}

.news-link {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.news-link:hover {
  text-decoration: underline;
}

.publications-page .section {
  margin-top: 1.75rem;
}

.publications-page .section:first-of-type {
  margin-top: 1.4rem;
}

.publications-page .content-card {
  padding: clamp(1rem, 2.1vw, 1.25rem);
}

.publications-page .page-title {
  font-size: clamp(1.75rem, 3.4vw, 2.3rem);
  margin-bottom: 0.55rem;
}

.publications-page .page-lead {
  margin-bottom: 0.9rem;
  max-width: 58ch;
}

.publications-page .section-heading {
  font-size: clamp(1.25rem, 2.3vw, 1.6rem);
  margin-bottom: 0.72rem;
}

.publications-page .publication-list {
  gap: 1rem;
  padding-left: 1.3rem;
}

.publications-page .publication-list li {
  padding-left: 0.1rem;
}

.publications-page .publication-list p {
  line-height: 1.55;
  max-width: 74ch;
}

.publications-page .publication-title {
  font-size: 1rem;
  letter-spacing: 0.005em;
  margin-bottom: 0.26rem;
}

.publications-page .publication-list em {
  color: var(--text);
}

.publications-page .publication-note {
  margin-top: 0.88rem;
}

.publications-page .news-list {
  list-style: none;
  padding-left: 0;
  gap: 0.78rem;
}

.publications-page .news-list li {
  border-left: 3px solid var(--border);
  padding-left: 0.85rem;
}

.publications-page .news-link {
  display: inline-block;
  line-height: 1.35;
  margin-bottom: 0.25rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  padding: 1.25rem 0 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (max-width: 1024px) {
  .hero-grid,
  .layout-two,
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-grid .hero-copy {
    grid-column: span 2;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 0.5rem);
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 0.85rem;
    background: var(--surface);
    display: none;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav a {
    padding: 0.56rem 0.7rem;
  }

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

@media (max-width: 760px) {
  .hero,
  .section {
    margin-top: 1.4rem;
  }

  .hero-grid,
  .layout-two,
  .card-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid .hero-copy {
    grid-column: auto;
  }

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

  .publications-page .content-card {
    padding: 0.95rem;
  }

  .publications-page .publication-list {
    padding-left: 1.1rem;
  }
}