/* =========================================================================
   FDT design tokens — canonical source.

   This file is the single source of truth for the --fdt-* token layer,
   consumed by every FDT web property as a Hugo Module (sites) or via
   go:embed (Go apps). Values are documented at
   design.frontierdefensetech.com. WebAwesome's wa-prefixed bridge
   mappings are deliberately NOT here — their scoping differs per site
   (see research-library's .wa-dark scoping) and they stay site-local.
   ========================================================================= */

:root,
.wa-dark {
  /* Navy surfaces (canvas → raised) */
  --fdt-navy-900: #0A1220;
  --fdt-navy-800: #0F1A2E;
  --fdt-navy-700: #16243D;
  --fdt-navy-600: #1E3050;

  /* Fog (text + light UI) */
  --fdt-fog-100: #E8EEF7;
  --fdt-fog-200: #C5D1E2;

  /* Steel (metadata + muted UI) */
  --fdt-steel-300: #8A9BB4;
  --fdt-steel-400: #5A6D8A;

  /* Electric (single accent) */
  --fdt-electric-300: #7BA9FF;
  --fdt-electric-400: #4A8DFF;
  --fdt-electric-500: #1D6EF5;
  --fdt-electric-600: #1456C7;

  /* Semantic */
  --fdt-hostile:     #E0322C;
  --fdt-hostile-400: #EE5050;
  --fdt-neutral:     #2FA85A;
  --fdt-caution:     #F2B535;

  /* Divider / border */
  --fdt-divider: #1F3352;

  /* Glow scale (xs/sm/md/lg/xl) */
  --fdt-glow-xs: 0 0   8px  2px rgba(29, 110, 245, 0.20);
  --fdt-glow-sm: 0 0  16px  2px rgba(29, 110, 245, 0.30);
  --fdt-glow-md: 0 0  32px  4px rgba(29, 110, 245, 0.35);
  --fdt-glow-lg: 0 0  64px  8px rgba(29, 110, 245, 0.40);
  --fdt-glow-xl: 0 0 128px 16px rgba(123, 169, 255, 0.35);

  /* Typography */
  --fdt-font-body:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --fdt-font-display:  'Inter Display', 'Inter', -apple-system, sans-serif;
  --fdt-font-wordmark: 'Barlow Condensed', 'Oswald', 'Arial Narrow', sans-serif;
  --fdt-font-mono:     'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Spacing (4px base) */
  --fdt-space-1: 4px;
  --fdt-space-2: 8px;
  --fdt-space-3: 12px;
  --fdt-space-4: 16px;
  --fdt-space-5: 24px;
  --fdt-space-6: 32px;
  --fdt-space-7: 48px;
  --fdt-space-8: 64px;
  --fdt-space-9: 96px;

  /* Radii */
  --fdt-radius-sm: 2px;
  --fdt-radius-md: 4px;
  --fdt-radius-lg: 8px;

  /* Motion — tempo (design system § Motion).
     UI state change: 150–250ms · panel entrance/exit: 400–600ms · ambient signal: 1–2s. */
  --fdt-motion-fast:    150ms;   /* hover, focus ring, tab switch */
  --fdt-motion-base:    200ms;   /* signature "Acquire" — selection, commit */
  --fdt-motion-slow:    350ms;   /* signature "Panel slide" — drawer/sheet */
  --fdt-motion-panel:   500ms;   /* panel entrance/exit, modal in */
  --fdt-motion-ambient: 1200ms;  /* live pulse */
  --fdt-motion-sweep:   2000ms;  /* radar sweep, ambient signals */

  /* Motion — easing. UI motion uses fast-out gentle-settle; tactical is linear. */
  --fdt-ease-ui:     cubic-bezier(0.2, 0.8, 0.2, 1);
  --fdt-ease-linear: linear;
}
:root {
  --max-width: 72rem;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--fdt-navy-900);
  color: var(--fdt-fog-100);
  font-family: var(--fdt-font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--fdt-electric-400); text-decoration: none; }
a:hover, a:focus { color: var(--fdt-electric-300); text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--fdt-navy-700);
  padding: 0.5rem 1rem;
  border-radius: var(--fdt-radius-md);
  z-index: 100;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* header */
.site-header {
  background: var(--fdt-navy-800);
  border-bottom: 1px solid var(--fdt-divider);
}
.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.site-brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  color: var(--fdt-fog-100);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.site-brand:hover, .site-brand:focus { color: var(--fdt-fog-100); text-decoration: none; }
.site-brand-mark {
  font-family: var(--fdt-font-mono);
  font-size: 0.85rem;
  background: var(--fdt-electric-400);
  color: var(--fdt-navy-900);
  padding: 0.15rem 0.45rem;
  border-radius: var(--fdt-radius-md);
  letter-spacing: 0.1em;
}
.site-brand-name {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
}
.site-nav a { color: var(--fdt-steel-300); }
.site-nav a:hover, .site-nav a:focus { color: var(--fdt-fog-100); }

/* search */
.site-search {
  position: relative;
  flex: 1 1 16rem;
  max-width: 24rem;
}
.site-search-input {
  width: 100%;
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  color: var(--fdt-fog-100);
  font-family: var(--fdt-font-body);
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  outline: none;
}
.site-search-input::placeholder { color: var(--fdt-steel-300); }
.site-search-input:focus { border-color: var(--fdt-electric-400); }
.site-search-results {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  right: 0;
  background: var(--fdt-navy-800);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  max-height: 24rem;
  overflow-y: auto;
  z-index: 50;
}
.site-search-results[hidden] { display: none; }
.search-results-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.search-results-list li { border-bottom: 1px solid var(--fdt-divider); }
.search-results-list li:last-child { border-bottom: none; }
.search-results-list a {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.5rem 0.75rem;
  color: var(--fdt-fog-100);
  text-decoration: none;
}
.search-results-list a:hover, .search-results-list a:focus {
  background: var(--fdt-navy-700);
  color: var(--fdt-fog-100);
  text-decoration: none;
  outline: none;
}
.search-result-kind {
  font-family: var(--fdt-font-mono);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--fdt-steel-300);
}
.search-result-title { font-size: 0.95rem; }
.search-empty, .search-error {
  margin: 0;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--fdt-steel-300);
}
.search-empty strong { color: var(--fdt-fog-100); }

/* page */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* hero */
.hero { margin-bottom: 3rem; }
.hero-eyebrow {
  font-family: var(--fdt-font-mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--fdt-steel-300);
  margin: 0 0 0.5rem;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}
.hero-lede {
  font-size: 1.15rem;
  color: var(--fdt-steel-300);
  max-width: 48rem;
  margin: 0;
}

/* section grid */
.sections-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 0.75rem;
}
.sections-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  padding: 1rem 1.25rem;
  color: var(--fdt-fog-100);
}
.sections-list a:hover, .sections-list a:focus {
  border-color: var(--fdt-electric-400);
  color: var(--fdt-fog-100);
  text-decoration: none;
}
.section-card-title { font-weight: 500; }
.section-card-arrow { color: var(--fdt-electric-400); font-size: 1.1rem; }

/* record list (section landing) */
.section-header { margin-bottom: 2rem; }
.section-header h1 { margin: 0; font-size: 2.4rem; letter-spacing: -0.01em; }
.record-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: 0.6rem;
}
.record-list a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  padding: 0.85rem 1rem;
  color: var(--fdt-fog-100);
}
.record-list a:hover, .record-list a:focus {
  border-color: var(--fdt-electric-400);
  text-decoration: none;
}
.record-list-title { font-weight: 500; }
.record-list-summary { color: var(--fdt-steel-300); font-size: 0.875rem; }

/* record (single) */
.record-header { margin-bottom: 2rem; }
.record-kind {
  font-family: var(--fdt-font-mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--fdt-steel-300);
  margin: 0 0 0.5rem;
}
.record-header h1 { margin: 0; font-size: 2.2rem; letter-spacing: -0.01em; }
.record-aliases {
  margin: 0.5rem 0 0;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--fdt-steel-300);
}
.record-short {
  font-family: var(--fdt-font-mono);
  background: var(--fdt-navy-700);
  padding: 0.1rem 0.5rem;
  border-radius: var(--fdt-radius-md);
  color: var(--fdt-fog-100);
}
.record-alias {
  font-style: italic;
}
.record-alias::before { content: "“"; }
.record-alias::after { content: "”"; }

.record-section { margin-top: 2rem; }
.record-section h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fdt-steel-300);
  font-weight: 600;
  border-bottom: 1px solid var(--fdt-divider);
  padding-bottom: 0.25rem;
  margin: 0 0 1rem;
}

/* facts grid (dl) */
.record-facts {
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 1.5rem;
}
.record-facts dt {
  font-family: var(--fdt-font-mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--fdt-steel-300);
  margin: 0;
  align-self: baseline;
}
.record-facts dd {
  margin: 0;
}
.record-fact-detail { color: var(--fdt-steel-300); }

/* inline list (chips) */
.record-list-inline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.record-list-inline li {
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  padding: 0.25rem 0.6rem;
  font-family: var(--fdt-font-mono);
  font-size: 0.85rem;
}
.record-list-inline li a {
  color: var(--fdt-fog-100);
  text-decoration: none;
}
/* Mouse hover and keyboard focus must both have visible affordance —
   the chip-link styling removes the default underline, so the global
   `a:focus` rule isn't enough. Mirror the hover treatment for both
   `:focus-within` (catches keyboard focus reaching the inner <a>)
   AND `:focus`, plus both `:focus` and `:focus-visible` on the
   inner <a>:
     - `:focus-visible` is the modern primary indicator — suppresses
       the focus ring on mouse click in browsers that implement it
       (Chrome 86+, Safari 15.4+, Firefox 85+).
     - `:focus` is the universal fallback. Older browsers without
       `:focus-visible` get a visible affordance for keyboard users
       at the cost of showing the ring on mouse click too —
       acceptable degradation versus no indicator at all. */
.record-list-inline li:hover,
.record-list-inline li:focus-within,
.record-list-inline li:focus {
  border-color: var(--fdt-electric-400);
}
.record-list-inline li:hover a,
.record-list-inline li a:focus,
.record-list-inline li a:focus-visible {
  color: var(--fdt-electric-400);
  outline: none;
}
/* Broken cross-reference: renders the bare id in <code> when the
   record id can't be resolved against the registry index. Visually
   distinct so a reader can spot a stale ref. */
.record-link-broken {
  color: var(--fdt-steel-300);
  text-decoration: line-through;
  text-decoration-style: dotted;
}

/* references */
.record-references {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.9rem;
}
.record-references li::before {
  content: "→ ";
  color: var(--fdt-steel-300);
}
.record-reference-publisher { color: var(--fdt-steel-300); }

/* tags */
.record-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  font-size: 0.75rem;
}
.record-tags li {
  background: transparent;
  border: 1px solid var(--fdt-divider);
  color: var(--fdt-steel-300);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-family: var(--fdt-font-mono);
}

/* armament (vessels) — label + chip-list groups */
.record-armament-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  align-items: baseline;
  margin-bottom: 0.6rem;
}
.record-armament-label {
  font-weight: 600;
  font-family: var(--fdt-font-mono);
  font-size: 0.85rem;
  color: var(--fdt-steel-300);
  flex: 0 0 9rem;
}

/* features (locations) */
.record-features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.record-features li {
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  padding: 0.5rem 0.75rem;
}
.record-feature-name { font-weight: 500; }
.record-feature-type {
  font-family: var(--fdt-font-mono);
  font-size: 0.8rem;
  color: var(--fdt-steel-300);
  margin-left: 0.5rem;
}
.record-feature-nations { color: var(--fdt-steel-300); margin-left: 0.5rem; }

/* aircraft history (squadrons) */
.record-aircraft-history {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.record-aircraft-history li {
  display: flex;
  justify-content: space-between;
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  padding: 0.4rem 0.75rem;
}
.record-aircraft-id { font-family: var(--fdt-font-mono); font-size: 0.9rem; }
.record-aircraft-period { color: var(--fdt-steel-300); font-size: 0.85rem; font-family: var(--fdt-font-mono); }

/* deployments (air-wings) */
.record-deployment {
  background: var(--fdt-navy-700);
  border: 1px solid var(--fdt-divider);
  border-radius: var(--fdt-radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.record-deployment-header h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}
.record-deployment-meta {
  margin: 0 0 0.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--fdt-steel-300);
  font-size: 0.85rem;
  font-family: var(--fdt-font-mono);
}
.record-deployment-notes {
  white-space: pre-wrap;
  color: var(--fdt-steel-300);
  font-size: 0.9rem;
  margin: 0 0 0.75rem;
}

/* glossary */
.glossary-entry .glossary-expansion {
  font-size: 1.05rem;
  color: var(--fdt-steel-300);
  margin: 0 0 1.5rem;
  font-style: italic;
}
.record-body { line-height: 1.7; }
.record-body h2 { margin-top: 2rem; }
.record-body code { font-family: var(--fdt-font-mono); font-size: 0.9em; background: var(--fdt-navy-700); padding: 0.1rem 0.3rem; border-radius: var(--fdt-radius-md); }

/* footer */
.site-footer {
  background: var(--fdt-navy-800);
  border-top: 1px solid var(--fdt-divider);
  margin-top: 4rem;
}
.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  font-size: 0.85rem;
  color: var(--fdt-steel-300);
}
.site-footer-brand {
  font-weight: 600;
  color: var(--fdt-fog-100);
  margin: 0 0 0.5rem;
}
.site-footer-links {
  margin: 0 0 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.site-footer-disclaimer {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  line-height: 1.5;
}
.site-footer-copyright {
  margin: 0;
  font-size: 0.75rem;
}

@media (max-width: 640px) {
  .site-header-inner { flex-direction: column; align-items: flex-start; }
  .page { padding: 2rem 1rem 3rem; }
}