:root {
  --ink: #18212f;
  --muted: #526070;
  --paper: #fbfaf7;
  --surface: #ffffff;
  --line: #d8ddd8;
  --blue: #255f85;
  --green: #476f54;
  --gold: #a56d21;
  --red: #a33f35;
  --violet: #5d527e;
  --shadow: 0 18px 60px rgba(24, 33, 47, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(120deg, rgba(37, 95, 133, 0.08), transparent 30%),
    linear-gradient(220deg, rgba(71, 111, 84, 0.1), transparent 28%),
    var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1rem;
}

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

.site-header {
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
}

.topbar {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  width: 2.75rem;
  height: 2.75rem;
  display: inline-grid;
  place-items: center;
  border: 2px solid var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a {
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  border-color: var(--blue);
  color: var(--ink);
}

.hero {
  width: min(1180px, calc(100% - 2rem));
  margin: auto;
  padding: 4rem 0 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 3rem;
  align-items: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.8rem;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.15rem;
}

.hero-title {
  margin: 1.2rem 0 0;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--blue);
  font-weight: 700;
  max-width: 62rem;
}

.hero-summary {
  max-width: 45rem;
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions,
.contact-actions,
.card-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}

.card-actions {
  margin-top: 1rem;
}

.button {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  font-weight: 700;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(24, 33, 47, 0.13);
}

.button.primary {
  background: var(--ink);
  color: #fff;
}

.signal-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

.signal-panel div {
  padding: 1rem;
  border-left: 5px solid var(--blue);
  background: #f5f7f6;
}

.signal-panel div:nth-child(2) {
  border-color: var(--green);
}

.signal-panel div:nth-child(3) {
  border-color: var(--red);
}

.signal-panel div:nth-child(4) {
  border-color: var(--violet);
}

.metric {
  display: block;
  font-size: 2.4rem;
  line-height: 1;
  font-weight: 900;
}

.metric-label {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 5rem 0;
}

.intro-grid,
.split-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: 3rem;
}

.lead-copy {
  font-size: 1.08rem;
  color: var(--muted);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 1.5rem;
}

.section-heading p {
  color: var(--muted);
}

.sticky-heading {
  align-self: start;
  position: sticky;
  top: 1rem;
}

.pathway-grid,
.evidence-grid,
.repo-grid,
.resource-grid,
.credential-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
  box-shadow: 0 8px 24px rgba(24, 33, 47, 0.06);
}

.pathway-card {
  min-height: 15rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card p {
  color: var(--muted);
}

.tag-row,
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag,
.filter-button {
  border: 1px solid var(--line);
  background: #f7f6f1;
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.filter-button {
  cursor: pointer;
  color: var(--ink);
}

.filter-button[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-card {
  border-left: 6px solid var(--blue);
}

.timeline-card[data-primary-domain="ai-governance"] {
  border-left-color: var(--green);
}

.timeline-card[data-primary-domain="curriculum"] {
  border-left-color: var(--gold);
}

.timeline-card[data-primary-domain="research"] {
  border-left-color: var(--violet);
}

.timeline-meta {
  color: var(--muted);
  font-weight: 700;
  margin: 0.25rem 0 0.75rem;
}

.timeline-card ul,
.credential-card ul {
  padding-left: 1.1rem;
  color: var(--muted);
}

.tool-row {
  margin-bottom: 1rem;
  display: grid;
  gap: 0.8rem;
}

.search-label {
  font-weight: 800;
}

.search-input {
  min-height: 3rem;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  background: #fff;
  color: var(--ink);
}

.resource-card {
  display: flex;
  flex-direction: column;
  min-height: 13.5rem;
}

.resource-type {
  color: var(--red);
  font-weight: 800;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.resource-card .button {
  margin-top: auto;
  width: fit-content;
}

.footer {
  margin-top: 3rem;
  padding: 3rem max(1rem, calc((100% - 1180px) / 2));
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  background: var(--ink);
  color: #fff;
}

.footer p {
  color: rgba(255, 255, 255, 0.75);
}

.footer .section-kicker {
  color: #e6bd78;
}

.footer .button {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}

.footer .button.primary {
  background: #fff;
  color: var(--ink);
}

@media (max-width: 900px) {
  .hero,
  .intro-grid,
  .split-section,
  .footer {
    grid-template-columns: 1fr;
  }

  .sticky-heading {
    position: static;
  }

  .pathway-grid,
  .evidence-grid,
  .repo-grid,
  .resource-grid,
  .credential-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: auto;
  }

  .topbar {
    align-items: flex-start;
  }

  .nav-links {
    gap: 0.65rem;
    font-size: 0.9rem;
  }

  .hero {
    padding: 2rem 0 3rem;
  }

  .section {
    padding: 3rem 0;
  }

  .pathway-grid,
  .evidence-grid,
  .repo-grid,
  .resource-grid,
  .credential-grid {
    grid-template-columns: 1fr;
  }
}

@media print {
  .topbar,
  .hero-actions,
  .filter-row,
  .tool-row,
  .footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .site-header {
    min-height: auto;
  }

  .hero,
  .section,
  .intro-grid,
  .split-section {
    display: block;
    width: 100%;
    padding: 1rem 0;
  }

  .card,
  .signal-panel {
    box-shadow: none;
    break-inside: avoid;
  }
}