:root {
  --ink: #132238;
  --ink-soft: #425268;
  --paper: #fbfcfe;
  --surface: #f0f4f7;
  --line: #d7e0e7;
  --accent: #1d6b65;
  --accent-dark: #15504c;
  --dark: #101d2c;
  --dark-soft: #c7d1dc;
  --physical: #176b55;
  --simulation: #7255a5;
  --active: #a45a16;
  --radius: 1rem;
  --shadow: 0 1.25rem 3rem rgba(19, 34, 56, 0.08);
  --shell: 74rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

h1,
h2,
h3 {
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 12ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.8rem, 7vw, 5.8rem);
  font-weight: 650;
}

h2 {
  max-width: 14ch;
  margin-bottom: 1.25rem;
  font-size: clamp(2.1rem, 4.5vw, 3.8rem);
  font-weight: 620;
}

h3 {
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
  font-weight: 650;
}

.shell {
  width: min(calc(100% - 2.5rem), var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--ink);
  color: white;
  transform: translateY(-180%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(215, 224, 231, 0.85);
  background: rgba(251, 252, 254, 0.92);
  backdrop-filter: blur(1rem);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header-inner {
  min-height: 5rem;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
}

.brand-name {
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: 0.01em;
}

.brand-detail {
  color: var(--ink-soft);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem 1.35rem;
}

.site-nav a {
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

.hero {
  padding: clamp(5rem, 10vw, 9rem) 0;
  background:
    radial-gradient(circle at 85% 10%, rgba(29, 107, 101, 0.14), transparent 28rem),
    linear-gradient(180deg, #ffffff 0%, var(--paper) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.75fr);
  align-items: end;
  gap: clamp(3rem, 8vw, 7rem);
}

.eyebrow,
.panel-label,
.programme-status {
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-summary {
  max-width: 42rem;
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-dark);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-panel {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
}

.lineage {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lineage li {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.75rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.lineage li:first-child {
  border-top: 0;
}

.lineage-index {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
}

.lineage strong,
.lineage span {
  display: block;
}

.lineage div > span {
  margin-top: 0.25rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.45;
}

.section {
  padding: clamp(5rem, 9vw, 8rem) 0;
}

.section-muted {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.section-dark {
  background: var(--dark);
  color: white;
}

.section-dark .eyebrow {
  color: #71c8be;
}

.section-dark .audience-intro,
.section-dark .check-list {
  color: var(--dark-soft);
}

.split-heading,
.audience-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(3rem, 8vw, 7rem);
}

.prose-large {
  color: var(--ink-soft);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.prose-large p:last-child {
  margin-bottom: 0;
}

.section-heading {
  max-width: 52rem;
  margin-bottom: 3rem;
}

.section-heading > p:last-child {
  max-width: 42rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

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

.card {
  min-height: 15rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}

.card p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.status {
  display: inline-flex;
  margin-bottom: 2.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-physical {
  color: var(--physical);
}

.status-simulation {
  color: var(--simulation);
}

.status-active {
  color: var(--active);
}

.programme-list {
  border-top: 1px solid var(--line);
}

.programme {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 2.2rem 0;
  border-bottom: 1px solid var(--line);
}

.programme-number {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 800;
}

.programme-status {
  margin-bottom: 0.5rem;
}

.programme h3 {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
}

.programme p:last-child {
  max-width: 50rem;
  margin-bottom: 0;
  color: var(--ink-soft);
}

.audience-intro {
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-size: 1.15rem;
}

.check-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding-left: 1.2rem;
}

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.55rem;
  margin: 2rem 0;
}

.process span {
  display: grid;
  min-height: 5rem;
  place-items: center;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: white;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 750;
  text-align: center;
}

.note {
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
}

.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  background: white;
}

.site-footer p {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.footer-note {
  max-width: 28rem;
  text-align: right;
}

:focus-visible {
  outline: 3px solid rgba(29, 107, 101, 0.35);
  outline-offset: 3px;
}

@media (max-width: 52rem) {
  .site-header {
    position: static;
  }

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

  .header-inner {
    padding-block: 1rem;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero-grid,
  .split-heading,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    align-items: start;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .process {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-note {
    text-align: left;
  }
}

@media (max-width: 34rem) {
  .shell {
    width: min(calc(100% - 1.5rem), var(--shell));
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .button {
    justify-content: center;
  }

  .programme {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .process {
    grid-template-columns: 1fr;
  }
}

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