/* NAE Core public site. Static, no scripts, no external resources.
   Design system: design variables first (light, then dark), then base, layout, components.
   Every text/background color pair used here is contrast-checked by check.mjs. */

:root {
  /* Color */
  --bg: #ffffff;
  --surface: #f3f6fa;
  --text: #17222f;
  --muted: #465366;
  --border: #d3dae3;
  --accent: #1a5796;
  --accent-text: #ffffff;
  --header-bg: #12365f;
  --header-text: #ffffff;
  --banner-bg: #fff3d1;
  --banner-text: #553d00;
  --banner-border: #dcb144;
  --flag-bg: #fde9c0;
  --flag-text: #553d00;
  --focus: #b35c00;
  --pilot-bg: #dcf3e4;
  --pilot-text: #11512b;
  --development-bg: #dde9f8;
  --development-text: #163f6e;
  --research-bg: #ece4f7;
  --research-text: #4a2a7a;
  --planned-bg: #e7ebf0;
  --planned-text: #36404c;
  --demo-bg: #fff0cc;
  --demo-text: #573b00;
  --high-bg: #fde2e1;
  --high-text: #8a1c17;
  --returned-bg: #fde9d6;
  --returned-text: #7a3300;

  /* Type and space */
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --measure: 68ch;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2.5rem;
  --radius: 0.4rem;
  --target: 2.75rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e141b;
    --surface: #17202b;
    --text: #e7ecf2;
    --muted: #adb8c6;
    --border: #2c3948;
    --accent: #8cbcf0;
    --accent-text: #0e141b;
    --header-bg: #0a1f38;
    --header-text: #ffffff;
    --banner-bg: #3b2f0b;
    --banner-text: #ffe7a6;
    --banner-border: #8a6d1c;
    --flag-bg: #4a3a0c;
    --flag-text: #ffe7a6;
    --focus: #ffb454;
    --pilot-bg: #12361f;
    --pilot-text: #a9e8c0;
    --development-bg: #14283f;
    --development-text: #a8cdf5;
    --research-bg: #2a1d40;
    --research-text: #d5c3f2;
    --planned-bg: #252d37;
    --planned-text: #c9d1db;
    --demo-bg: #3b2f0b;
    --demo-text: #ffe7a6;
    --high-bg: #3d1513;
    --high-text: #ffc1bd;
    --returned-bg: #3a220e;
    --returned-text: #ffcf9e;
  }
}

/* Base */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

.wrap {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

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

main {
  flex: 1 0 auto;
}

main:focus {
  outline: none;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 var(--space-3);
}

h1 {
  font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3rem);
  letter-spacing: -0.01em;
  max-width: 40ch;
}

h2 {
  font-size: clamp(1.4rem, 1.2rem + 0.9vw, 1.75rem);
}

h3 {
  font-size: 1.125rem;
}

p,
ul,
ol,
dl {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -4rem;
  z-index: 20;
  padding: 0.6rem 0.9rem;
  background: var(--bg);
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 0.25rem;
  font-weight: 600;
}

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

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

/* Draft banner */

.draft-banner {
  background: var(--banner-bg);
  color: var(--banner-text);
  border-bottom: 1px solid var(--banner-border);
  font-size: 0.95rem;
  padding: 0.6rem 0;
}

.draft-banner p {
  margin: 0;
  max-width: none;
}

/* Header and navigation */

.site-header {
  position: relative;
  z-index: 10;
  background: var(--header-bg);
  color: var(--header-text);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-5);
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
  color: var(--header-text);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.site-header a {
  color: var(--header-text);
}

.site-header :focus-visible {
  outline-color: #ffffff;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.1rem;
  max-width: none;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a,
.nav-stack a {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.nav-list a:hover,
.nav-list a[aria-current="page"],
.nav-list a.in-section,
.nav-stack a[aria-current="page"],
.nav-stack a.in-section {
  border-bottom-color: var(--header-text);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
  padding: 0 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.nav-mobile summary {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
  padding: 0 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.nav-mobile summary::-webkit-details-marker {
  display: none;
}

.nav-mobile summary::after {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  margin-left: 0.55rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.nav-mobile[open] summary::after {
  transform: translateY(2px) rotate(-135deg);
}

.nav-mobile nav {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--header-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.25);
}

.nav-stack {
  max-width: 72rem;
  margin: 0 auto;
  padding: var(--space-2) 1.25rem var(--space-4);
  list-style: none;
}

.nav-stack li + li {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.nav-stack a {
  width: 100%;
}

.nav-desktop {
  display: none;
}

@media (min-width: 75rem) {
  .nav-desktop {
    display: block;
  }

  .nav-mobile {
    display: none;
  }
}

/* Breadcrumbs */

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--space-2);
  max-width: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
  font-size: 0.95rem;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--muted);
}

.breadcrumbs a,
.breadcrumbs span {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
}

/* Sections */

.hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 2.75rem 0 2.5rem;
}

.section {
  padding: var(--space-6) 0;
}

.section-surface {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section + .section:not(.section-surface) {
  border-top: 1px solid var(--border);
}

.section-surface + .section {
  border-top: 0;
}

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

.eyebrow {
  margin-bottom: var(--space-2);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lede {
  max-width: 42rem;
  font-size: 1.2rem;
}

.note {
  max-width: 42rem;
  margin: var(--space-5) 0 0;
  padding: 0.9rem 1.1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0.25rem;
}

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

/* Buttons (links styled as actions) */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--target);
  padding: 0 1.1rem;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}

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

/* Badges, chips and review flags */

.badge,
.chip {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.5;
}

.badge-pilot,
.chip-approved {
  background: var(--pilot-bg);
  color: var(--pilot-text);
}

.badge-development,
.chip-info {
  background: var(--development-bg);
  color: var(--development-text);
}

.badge-research {
  background: var(--research-bg);
  color: var(--research-text);
}

.badge-planned {
  background: var(--planned-bg);
  color: var(--planned-text);
}

.badge-demo,
.chip-medium,
.chip-waiting {
  background: var(--demo-bg);
  color: var(--demo-text);
}

.chip-high {
  background: var(--high-bg);
  color: var(--high-text);
}

.chip-returned {
  background: var(--returned-bg);
  color: var(--returned-text);
}

.review-flag {
  display: inline-block;
  padding: 0.05rem 0.45rem;
  background: var(--flag-bg);
  color: var(--flag-text);
  border-radius: 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.keep-together {
  white-space: nowrap;
}

.placeholder {
  display: inline-block;
  max-width: 100%;
  padding: 0.05rem 0.4rem;
  border: 1px dashed var(--muted);
  border-radius: 0.25rem;
  color: var(--muted);
}

/* Status legend */

.status-legend {
  display: grid;
  gap: var(--space-3);
  max-width: 52rem;
}

.legend-row {
  display: grid;
  grid-template-columns: minmax(11rem, max-content) 1fr;
  gap: var(--space-2) var(--space-4);
  align-items: baseline;
}

.legend-row dd {
  margin: 0;
}

/* Cards */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: var(--space-4);
  max-width: none;
  margin: var(--space-5) 0 var(--space-4);
  padding: 0;
  list-style: none;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 1.1rem 1.2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.section:not(.section-surface) .card {
  background: var(--surface);
}

.card p {
  margin: 0 0 var(--space-2);
  color: var(--muted);
}

.card .card-status {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.card .card-link {
  margin-top: auto;
  padding-top: var(--space-2);
}

.card-link a {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
  font-weight: 600;
}

.card-nav h3 a {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
}

/* Steps */

.steps {
  counter-reset: step;
  display: grid;
  gap: var(--space-4);
  max-width: 52rem;
  padding: 0;
  list-style: none;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 3.25rem;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
}

.steps h3 {
  margin-bottom: var(--space-1);
  padding-top: 0.35rem;
}

.steps p {
  margin: 0;
}

/* Callouts */

.callout {
  max-width: var(--measure);
  margin: var(--space-5) 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0.25rem;
  background: var(--bg);
}

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

.callout-title {
  margin-bottom: var(--space-1);
}

.callout-demo {
  background: var(--demo-bg);
  color: var(--demo-text);
  border-color: var(--banner-border);
}

.callout-warning {
  background: var(--high-bg);
  color: var(--high-text);
  border-left-color: var(--high-text);
}

/* Definitions and self-checks */

.definitions > div {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}

.definitions dt {
  font-weight: 700;
}

.definitions dd {
  margin: var(--space-1) 0 0;
}

.self-check,
.storyboards {
  display: grid;
  gap: var(--space-3);
  max-width: 52rem;
  margin-bottom: var(--space-4);
}

details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.nav-mobile {
  border: 0;
  background: transparent;
}

details summary {
  display: flex;
  align-items: center;
  min-height: var(--target);
  padding: 0.4rem 1rem;
  font-weight: 600;
  cursor: pointer;
}

details > p {
  margin: 0;
  padding: 0 1rem 1rem;
}

/* Demo banner */

.demo-banner {
  max-width: 52rem;
  margin: 0 0 var(--space-4);
  padding: 0.7rem 1rem;
  background: var(--demo-bg);
  color: var(--demo-text);
  border: 1px solid var(--banner-border);
  border-radius: var(--radius);
}

.demo-banner p {
  margin: 0;
}

.demo-banner .badge {
  margin-right: var(--space-2);
  background: var(--bg);
  color: var(--text);
}

/* KPI tiles */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: var(--space-4);
  max-width: none;
  padding: 0;
  list-style: none;
}

.kpi {
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.kpi p {
  margin: 0;
}

.kpi-label {
  color: var(--muted);
  font-weight: 600;
}

.kpi-value {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.kpi-unit {
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.kpi-note {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Tables */

.table-wrap {
  max-width: 100%;
  margin: 0 0 var(--space-4);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  max-width: 52rem;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.data-table caption {
  margin-bottom: var(--space-2);
  color: var(--muted);
  font-weight: 600;
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.data-table thead th {
  border-bottom: 2px solid var(--text);
}

.data-table tbody th {
  font-weight: 600;
}

.data-table .num {
  text-align: right;
}

/* Chart */

.chart {
  max-width: 52rem;
  margin: 0 0 var(--space-4);
}

.chart svg {
  display: block;
  width: 100%;
  max-width: 40rem;
  height: auto;
  margin-bottom: var(--space-2);
}

.chart-bar {
  fill: var(--accent);
}

.chart-label,
.chart-value {
  fill: var(--text);
  font-family: var(--font);
  font-size: 14px;
}

.chart-value {
  font-weight: 700;
}

.chart figcaption {
  margin-bottom: var(--space-4);
  color: var(--muted);
  font-size: 0.95rem;
}

/* Attention list and approval queue */

.attention-list,
.queue {
  display: grid;
  gap: var(--space-3);
  max-width: 52rem;
  padding: 0;
  list-style: none;
}

.attention,
.queue-item {
  padding: 1rem 1.1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: var(--radius);
}

.section:not(.section-surface) .attention,
.section:not(.section-surface) .queue-item {
  background: var(--surface);
}

.attention-high {
  border-left-color: var(--high-text);
}

.attention-medium {
  border-left-color: var(--banner-border);
}

.attention-info {
  border-left-color: var(--accent);
}

.attention p,
.queue-item p {
  margin: 0 0 var(--space-1);
}

.queue-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.queue-item h3 {
  margin-top: var(--space-2);
}

.queue-facts,
.scene-facts {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-3) 0 0;
}

.queue-facts > div,
.scene-facts > div {
  display: grid;
  grid-template-columns: minmax(8rem, 12rem) 1fr;
  gap: var(--space-3);
}

.queue-facts dt,
.scene-facts dt {
  color: var(--muted);
  font-weight: 600;
}

.queue-facts dd,
.scene-facts dd {
  margin: 0;
}

/* Storyboards */

.storyboard {
  padding: 1.1rem 1.2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.storyboard details {
  margin-top: var(--space-3);
}

.scenes {
  margin: 0;
  padding: 0 1rem 1rem;
  list-style: none;
}

.scene {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border);
}

.scene-head {
  margin: 0;
}

/* Legal documents */

.legal {
  padding: 2.5rem 0 3rem;
}

.legal h2 {
  margin-top: 2.25rem;
  font-size: 1.35rem;
}

.legal h3 {
  margin-top: 1.5rem;
}

.doc-status {
  max-width: var(--measure);
  margin: 1.25rem 0 1.5rem;
  padding: 1rem 1.1rem;
  background: var(--banner-bg);
  color: var(--banner-text);
  border: 1px solid var(--banner-border);
  border-radius: 0.25rem;
}

.doc-status p:last-child {
  margin-bottom: 0;
}

.toc {
  max-width: var(--measure);
  padding: 1rem 1.1rem 1rem 2.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
}

.toc li + li {
  margin-top: 0.2rem;
}

/* Footer */

.site-footer {
  padding: 2.25rem 0 2.5rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
}

.footer-heading {
  margin: 0 0 var(--space-2);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 700;
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
}

.footer-identity {
  margin: 0 0 var(--space-2);
  max-width: none;
}

/* Small screens */

@media (max-width: 30rem) {
  .hero {
    padding: 2rem 0 1.75rem;
  }

  .section {
    padding: 2rem 0;
  }

  .review-flag {
    white-space: normal;
  }

  .legend-row,
  .queue-facts > div,
  .scene-facts > div {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .header-tools {
    gap: var(--space-2);
  }

  .lang-switch,
  .nav-mobile summary {
    padding: 0 0.6rem;
  }
}

@media print {
  .site-header,
  .site-footer nav,
  .skip-link {
    display: none;
  }

  body {
    font-size: 11pt;
  }
}