@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Roboto+Mono:wght@400;500;600&display=swap');

:root {
  color-scheme: dark;

  --bg: #070b13;
  --ink: #edf1f7;
  --ink-muted: #8d9bb0;
  --border: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.22);
  --navy: #060a12;
  --navy-ink: #b9c8dd;
  --blue: #4d9fe8;
  --blue-dark: #2f7dc4;
  --amber: #f2b705;
  --amber-bg: rgba(242, 183, 5, 0.14);
  --amber-border: rgba(242, 183, 5, 0.4);
  --green: #34d399;
  --green-bg: rgba(52, 211, 153, 0.14);
  --green-border: rgba(52, 211, 153, 0.4);
  --mono: ui-monospace, 'Roboto Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  /* Glass system — dark frosted panels over an ambient gradient backdrop */
  --glass-bg: rgba(22, 30, 46, 0.55);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-blur: blur(20px) saturate(160%);
  --glass-blur-sm: blur(12px) saturate(150%);
  --glass-shadow: 0 20px 50px -16px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  --glass-shadow-sm: 0 10px 26px -14px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.06);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
  background-image:
    radial-gradient(1000px 700px at 8% -10%, rgba(77, 159, 232, 0.22), transparent 60%),
    radial-gradient(800px 620px at 96% 0%, rgba(242, 183, 5, 0.14), transparent 58%),
    radial-gradient(900px 780px at 18% 100%, rgba(52, 211, 153, 0.13), transparent 55%),
    radial-gradient(1200px 820px at 100% 100%, rgba(29, 111, 184, 0.18), transparent 60%),
    linear-gradient(180deg, #0a0f1a 0%, #05070d 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

a { color: var(--blue); }

/* ---------- Masthead ---------- */

.masthead {
  /* backdrop-filter lives on ::before, not on this element, so it never
     becomes a containing block for any fixed-position descendant. */
  color: var(--navy-ink);
  border-bottom: 1px solid rgba(242, 183, 5, 0.3);
  box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 16px 36px -18px rgba(0, 0, 0, 0.85);
  position: sticky;
  top: 0;
  z-index: 30;
  isolation: isolate;
}

.masthead::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(6, 10, 18, 0.86), rgba(4, 7, 13, 0.82));
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.masthead__bar {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: #ffffff;
  text-decoration: none;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: linear-gradient(145deg, #f7cb5f, #d99a12);
  box-shadow: 0 0 16px -2px rgba(242, 183, 5, 0.65), inset 0 1px 0 rgba(255,255,255,0.5);
  color: #1a1206;
  font-size: 16px;
}

.doc-meta {
  max-width: 1240px;
  margin: 0 auto;
  padding: 8px 20px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
}

.doc-meta dt {
  color: #6b7c95;
  text-transform: uppercase;
  font-size: 10px;
  margin-bottom: 2px;
}

.doc-meta dd {
  margin: 0;
  color: #fff;
  font-weight: 600;
}

.doc-meta .badge--active {
  background: linear-gradient(135deg, #4de8a3, #1fae6f);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.2) inset, 0 0 14px -2px rgba(52, 211, 153, 0.7);
  color: #052e1c;
  padding: 1px 9px;
  border-radius: 20px;
  font-weight: 700;
}

/* ---------- Page shell ---------- */

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.titleblock {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: 22px 26px;
  margin-bottom: 18px;
}

.titleblock__row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.titleblock h1 {
  margin: 0 0 4px;
  font-size: 26px;
  letter-spacing: 0.01em;
  color: #fff;
}

.titleblock .tag {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.titleblock .subtitle {
  margin-top: 4px;
  color: var(--ink-muted);
  font-size: 14px;
}

/* ---------- Disclaimer ---------- */

.disclaimer {
  background: rgba(242, 183, 5, 0.09);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  border: 1px solid rgba(242, 183, 5, 0.3);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow-sm);
  padding: 12px 16px;
  margin-bottom: 18px;
  font-size: 12.5px;
  color: #e7dcbb;
  line-height: 1.55;
}

.disclaimer strong {
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.disclaimer--global {
  max-width: 1240px;
  margin: 18px auto 0;
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(255,255,255,0.06);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--glass-shadow-sm);
  text-decoration: none;
  display: inline-block;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.btn:hover { background: rgba(255,255,255,0.12); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, rgba(77, 159, 232, 0.95), rgba(47, 125, 196, 0.95));
  border-color: rgba(255,255,255,0.25);
  color: #fff;
  box-shadow: 0 10px 24px -8px rgba(77, 159, 232, 0.6), inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn--primary:hover { background: linear-gradient(135deg, rgba(93, 172, 240, 0.98), rgba(56, 138, 212, 0.98)); }

.btn--ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--ink-muted);
  box-shadow: none;
}
.btn--ghost:hover { background: rgba(255,255,255,0.08); color: var(--ink); box-shadow: var(--glass-shadow-sm); }

/* ---------- Hangar cards (the checklist database) ---------- */

.hangar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.hangar-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow-sm);
  padding: 18px;
  color: var(--ink);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.hangar-card:hover {
  border-color: rgba(77, 159, 232, 0.5);
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow);
}

.hangar-card__tag {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #9cc9f2;
  background: rgba(77, 159, 232, 0.14);
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.hangar-card h2 {
  margin: 0 0 6px;
  font-size: 17px;
  color: #fff;
}

.hangar-card p {
  margin: 0 0 16px;
  font-size: 12.5px;
  color: var(--ink-muted);
}

.hangar-card__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */

.site-footer {
  max-width: 1240px;
  margin: 30px auto 0;
  padding: 16px 20px 30px;
  text-align: center;
  color: var(--ink-muted);
  font-size: 12px;
}

/* ---------- No backdrop-filter support fallback ---------- */

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .masthead::before { background: var(--navy); }
  .titleblock, .hangar-card { background: rgba(18, 24, 38, 0.96); }
  .disclaimer { background: rgba(30, 24, 8, 0.96); }
  .btn { background: rgba(30, 38, 54, 0.96); }
  .btn--ghost:hover { background: rgba(40, 50, 68, 0.96); }
}

/* ---------- Responsive ---------- */

@media (max-width: 560px) {
  .titleblock__row { flex-direction: column; }
}

/* ---------- Print ---------- */

@media print {
  :root { color-scheme: light; }
  body { background: #fff !important; color: #000; font-size: 11px; }

  .btn, .site-footer { display: none !important; }

  .masthead {
    position: static;
    color: #000 !important;
    border-bottom: 2px solid #000;
    box-shadow: none !important;
  }
  .masthead::before { display: none !important; }
  .brand, .brand__mark { color: #000 !important; background: none !important; box-shadow: none !important; }
  .doc-meta dd, .doc-meta dt { color: #000 !important; }
  .doc-meta .badge--active { background: none !important; color: #000 !important; border: 1px solid #000; box-shadow: none !important; }

  .page { padding: 0; max-width: 100%; }

  .titleblock, .disclaimer, .hangar-card {
    background: #fff !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    box-shadow: none !important;
    border: 1px solid #999;
    color: #000;
    break-inside: avoid;
  }

  .titleblock h1, .titleblock .subtitle, .titleblock .tag,
  .hangar-card h2, .hangar-card p, .hangar-card__tag {
    color: #000 !important;
  }

  .disclaimer { color: #000; }

  a[href]::after { content: none !important; }
}