:root {
  --bg: #f7f8f4;
  --paper: #ffffff;
  --ink: #182422;
  --muted: #5c6965;
  --line: #d8ded7;
  --teal: #0d6b63;
  --blue: #2e5c83;
  --amber: #b7751d;
  --soft: #edf3f0;
  --shadow: 0 18px 48px rgba(24, 36, 34, 0.11);
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
}

body.nav-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration-color: rgba(13, 107, 99, 0.4);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover {
  color: var(--teal);
  text-decoration-color: currentColor;
}

img {
  max-width: 100%;
  display: block;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  background: var(--ink);
  color: var(--paper);
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  transition: top 150ms ease;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(216, 222, 215, 0.86);
  background: rgba(247, 248, 244, 0.94);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(100% - 2rem, var(--max-width));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(13, 107, 99, 0.32);
  border-radius: 6px;
  background: var(--paper);
  color: var(--teal);
  font-size: 0.9rem;
}

.brand-text {
  font-size: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.93rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  line-height: 68px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
  border-bottom-color: var(--teal);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  min-height: 74svh;
  display: grid;
  align-items: center;
  position: relative;
  overflow: hidden;
  background-image: url("assets/secure-networked-intelligence.png");
  background-position: center right;
  background-size: cover;
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(247, 248, 244, 0.78);
}

.hero-content {
  position: relative;
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  padding: 4.8rem 0 5.2rem;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.65rem;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4.5rem;
  line-height: 1.02;
  font-weight: 700;
}

.subtitle {
  max-width: 760px;
  margin: 1rem 0 0;
  color: var(--blue);
  font-size: 1.35rem;
  font-weight: 650;
}

.hero-summary {
  max-width: 700px;
  margin: 1.25rem 0 0;
  color: #2f3d39;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.8rem;
}

.hero-actions a,
.hero-actions button,
.text-link {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(13, 107, 99, 0.35);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--teal);
  padding: 0.58rem 0.82rem;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.hero-actions a:hover,
.hero-actions button:hover,
.text-link:hover {
  background: var(--teal);
  color: var(--paper);
  border-color: var(--teal);
}

.quick-facts {
  max-width: 980px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2.4rem 0 0;
}

.quick-facts div {
  min-width: 0;
  border-left: 3px solid var(--teal);
  background: rgba(255, 255, 255, 0.62);
  padding: 0.9rem 1rem;
}

.quick-facts dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.quick-facts dd {
  margin: 0.2rem 0 0;
  color: var(--ink);
  font-weight: 650;
}

.section {
  padding: 5rem 0;
  background: var(--paper);
}

.section-light {
  background: var(--soft);
}

.section-inner {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.two-column,
.split-list {
  display: grid;
  grid-template-columns: minmax(220px, 0.82fr) minmax(0, 1.55fr);
  gap: 3.5rem;
  align-items: start;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2.2rem;
}

.publication-heading {
  max-width: none;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
}

h2,
h3,
p {
  overflow-wrap: anywhere;
}

h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.2rem;
  line-height: 1.16;
}

h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.prose p,
.split-list p {
  margin: 0 0 1rem;
  color: #33403c;
  font-size: 1.05rem;
}

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

.research-card {
  min-height: 178px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
  padding: 1.2rem;
}

.research-card h3 {
  color: var(--teal);
}

.research-card p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.publication-group {
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
  margin-top: 1.4rem;
}

.publication-group h3 {
  color: var(--blue);
  margin-bottom: 0.85rem;
}

.publication-list {
  display: grid;
  gap: 0.8rem;
  margin: 0;
  padding-left: 1.35rem;
}

.publication-list li {
  padding-left: 0.25rem;
}

.pub-title {
  display: block;
  font-weight: 700;
}

.pub-meta {
  display: block;
  color: var(--muted);
}

.timeline,
.course-list {
  display: grid;
  gap: 1rem;
}

.timeline article,
.course-list article,
.simple-panel {
  border-left: 3px solid var(--amber);
  background: #fbfcfa;
  padding: 1rem 1.1rem;
}

.timeline p,
.course-list p {
  margin: 0.4rem 0 0;
  color: var(--muted);
}

.simple-panel {
  border-left-color: var(--teal);
}

.simple-panel h3 {
  margin-bottom: 0.6rem;
}

.simple-panel ul,
.service-list ul {
  margin: 0;
  padding-left: 1.1rem;
  color: #33403c;
}

.simple-panel li,
.service-list li {
  margin: 0.45rem 0;
}

.contact-section {
  background: #fbfcfa;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.contact-card {
  min-height: 126px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 1rem;
  color: inherit;
  font: inherit;
  text-align: left;
  text-decoration: none;
  cursor: default;
}

.contact-grid a.contact-card,
.contact-grid button.contact-card {
  cursor: pointer;
}

.contact-grid button.contact-card {
  appearance: none;
}

.contact-grid a.contact-card:hover,
.contact-grid button.contact-card:hover {
  border-color: rgba(13, 107, 99, 0.45);
  box-shadow: var(--shadow);
  color: var(--ink);
}

.contact-card span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.contact-card strong {
  color: var(--teal);
  font-size: 0.95rem;
  line-height: 1.35;
}

.contact-card small {
  color: var(--muted);
  font-size: 0.8rem;
}

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

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.82);
}

.footer-inner {
  width: min(100% - 2rem, var(--max-width));
  min-height: 86px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  color: #ffffff;
}

@media (max-width: 920px) {
  .hero h1 {
    font-size: 3.4rem;
  }

  .quick-facts,
  .research-grid,
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .two-column,
  .split-list {
    grid-template-columns: 1fr;
    gap: 1.7rem;
  }

  .publication-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: fixed;
    inset: 68px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: var(--shadow);
  }

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

  .nav-links a {
    min-height: 52px;
    line-height: 52px;
    padding: 0 1rem;
    border-bottom: 1px solid var(--line);
  }

  .hero {
    min-height: 68svh;
    background-position: 62% center;
  }

  .hero::before {
    background: rgba(247, 248, 244, 0.84);
  }

  .hero-content {
    padding: 3.7rem 0 3.9rem;
  }

  .hero h1 {
    font-size: 2.55rem;
  }

  .subtitle {
    font-size: 1.13rem;
  }

  .section {
    padding: 3.6rem 0;
  }

  h2 {
    font-size: 1.85rem;
  }

  .quick-facts,
  .research-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 1.2rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}