:root {
  --primary: #022797;       /* Deep blue */
  --primary-dark: #01134a;  /* Navy */
  --accent: #5fb175;        /* Green accent */
  --bg: #edf3f6;            /* Light background */
  --text: #01134a;          /* Primary text */
  --muted: #6b7280;
  --white: #ffffff;
  --max-width: 960px;
  --radius: 10px;
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Roboto", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(
    circle at top left,
    #ffffff 0,
    #edf3f6 40%,
    #3552ac 100%
  );
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

/* Typography: headings in Montserrat */
h1,
h2,
h3,
h4,
.hero-heading,
.logo-text-main,
.logo-text-sub {
  font-family: "Montserrat", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

/* Utility: visually hidden text */
.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;
}

.nowrap {
  white-space: nowrap;
}

/* MODULE: Layout shell */

header {
  background: linear-gradient(
    135deg,
    var(--primary-dark) 0%,
    var(--primary) 60%,
    var(--accent) 100%
  );
  color: var(--white);
  padding: 1.25rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(1, 19, 74, 0.35);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.25rem 1.5rem 3rem 1.5rem;
}

section {
  margin-bottom: 2.75rem;
}

section h2 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section-intro {
  font-size: 0.95rem;
  color: var(--text);  /* was var(--muted) */
  margin-bottom: 1.2rem;
  max-width: 46rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  align-items: start;
}

.card {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

/* MODULE: Navigation */

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

.logo-link {
  display: inline-flex;
  align-items: center;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

/* Old logo-mark styles no longer used */
.logo-mark {
  display: none;
}

.logo-text-main {
  font-weight: 700;
  letter-spacing: 0.03em;
  font-size: 1.1rem;
}

.logo-text-sub {
  font-size: 0.78rem;
  opacity: 0.9;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav a {
  color: #edf3f6;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.1s ease;
}

nav a:hover {
  background: rgba(1, 19, 74, 0.3);
  color: #ffffff;
  transform: translateY(-1px);
  text-decoration: none;
}

/* MODULE: Hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.5fr);
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 2.75rem;
}

.hero-heading {
  font-size: clamp(2rem, 3vw, 2.4rem);
  margin-bottom: 0.75rem;
  letter-spacing: -0.03em;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--muted);
  max-width: 34rem;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.5rem;
}

.hero-card {
  background: var(--white);
  border-radius: 18px;
  padding: 1.75rem 1.75rem 1.5rem 1.75rem;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.05);
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: rgba(15, 23, 42, 0.03);
  border-radius: 999px;
  padding: 0.27rem 0.7rem;
  margin-bottom: 0.6rem;
}

.hero-pill span:first-child {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(95, 177, 117, 0.25);
}

.abstract-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.abstract-text {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 0.9rem;
}

.abstract-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 0.5rem;
  border-top: 1px dashed rgba(148, 163, 184, 0.35);
}

.abstract-meta strong {
  font-weight: 600;
  color: var(--text);
}

.hero-notice {
  font-size: 0.8rem;
  color: var(--muted);
}

.hero-notice a {
  color: #fef3c7;
}

.hero-notice a:hover {
  text-decoration: underline;
}

/* Abstract logo block */
.abstract-logo {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-start;
}

.abstract-logo img {
  max-height: 72px;
  width: auto;
}

/* MODULE: Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.1s ease;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #01134a;
  box-shadow: 0 8px 18px rgba(95, 177, 117, 0.35);
}

.btn-primary:hover {
  background: #4a9a63;
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(95, 177, 117, 0.4);
  text-decoration: none;
}

/* New neutral button for Committee Website */
.btn-neutral {
  background: #e5e7eb;
  color: #111827;
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.15);
}

.btn-neutral:hover {
  background: #d1d5db;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.2);
  text-decoration: none;
}

.btn-outline {
  background: rgba(1, 19, 74, 0.04);
  color: var(--white);
  border: 1px solid rgba(226, 232, 240, 0.3);
}

.btn-outline:hover {
  background: rgba(1, 19, 74, 0.16);
  transform: translateY(-1px);
  text-decoration: none;
}

/* MODULE: Utility content patterns */

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.pill {
  font-size: 0.78rem;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.03);
  color: var(--muted);
}

.links-list {
  list-style: none;
  font-size: 0.9rem;
}

.links-list li + li {
  margin-top: 0.4rem;
}

.links-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.25rem;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: rgba(15, 23, 42, 0.03);
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(95, 177, 117, 0.25);
}

/* Program information layout */

.program-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.3fr);
  gap: 1.5rem;
  align-items: start;
  margin-top: 0.6rem;
}

.program-subheading {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.program-list {
  list-style: none;
  padding-left: 0;
  margin: 0 0 0.9rem 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.program-list li + li {
  margin-top: 0.4rem;
}

.program-list li::before {
  content: "•";
  color: var(--accent);
  font-weight: 700;
  display: inline-block;
  width: 0.9rem;
  margin-left: -0.1rem;
}

.program-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.metric {
  background: rgba(1, 19, 74, 0.03);
  border-radius: 12px;
  padding: 0.6rem 0.7rem;
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.metric-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

.metric-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.metric-note {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.program-detail p {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.nsf-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.6rem;
}

.nsf-note {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.4rem;
  font-style: italic;
}

.muted {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.3rem;
  font-style: italic;  
}

.subheading {
  margin-top: 1.1rem;
}

.bullet-list {
  font-size: 0.9rem;
  color: var(--muted);
  margin-left: 1rem;
  margin-top: 0.3rem;
}

/* MODULE: Footer */

footer {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  background: #01134a;
  color: #edf3f6;
  padding: 1.4rem 1.5rem 1.8rem 1.5rem;
  font-size: 0.8rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.8rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-links a {
  color: #edf3f6;
  font-size: 0.8rem;
}

.footer-links a:hover {
  text-decoration: underline;
}

.nsf-disclaimer {
  max-width: 620px;
}

.license-text {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  padding-top: 0.8rem;
  margin-top: 0.2rem;
  font-size: 0.78rem;
  color: #edf3f6;
}

.license-text a {
  color: #edf3f6;
}

/* RESPONSIVE */

@media (max-width: 800px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-card {
    order: -1;
  }

  header {
    position: static;
  }

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

@media (max-width: 700px) {
  .program-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .program-metrics {
    margin-top: 0.5rem;
  }
}

@media (max-width: 600px) {
  main {
    padding-inline: 1.1rem;
  }

  header {
    padding-inline: 1.1rem;
  }

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

  nav ul {
    justify-content: flex-start;
  }

  .hero-card {
    padding: 1.4rem 1.3rem 1.2rem 1.3rem;
  }
}