:root {
  --bg-canvas: #0b0b0d;
  --bg-surface: #20191b;
  --bg-surface-hover: #2c2225;
  --text-primary: #f4f4f5;
  --text-muted: #c0c4cc;
  --accent-primary: #dc2626;
  --accent-secondary: #c0c4cc;
  --border-subtle: rgba(192, 196, 204, 0.25);
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-elevation: 0 12px 32px -4px rgba(0, 0, 0, 0.45);
  --glow-accent: 0 0 24px -4px var(--accent-primary);
  --glass-backdrop: blur(16px) saturate(180%);
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-wrap: anywhere;
  hyphens: auto;
  scroll-behavior: smooth;
}

a {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color: var(--accent-primary);
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

a:hover, a:focus-visible {
  color: var(--accent-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
  object-fit: cover;
}

.wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Inset floating rounded header box */
.site-header {
  position: relative;
  max-width: 1200px;
  margin: 1.25rem auto 0;
  padding: 0.85rem 1.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

@media (max-width: 1240px) {
  .site-header {
    margin: 1rem 1.25rem 0;
  }
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand-mark {
  width: 14px;
  height: 14px;
  background-color: var(--accent-primary);
  display: inline-block;
  border: 2px solid var(--text-muted);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.desktop-nav a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.35rem 0.5rem;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  color: var(--text-primary);
  background-color: rgba(220, 38, 38, 0.18);
}

.menu-toggle {
  display: none;
  background: var(--bg-canvas);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.65rem;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  left: 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1rem;
  z-index: 50;
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu ul {
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.mobile-menu a {
  display: block;
  padding: 0.6rem 0.75rem;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  border-left: 3px solid transparent;
}

.mobile-menu a:hover,
.mobile-menu a[aria-current="page"] {
  border-left-color: var(--accent-primary);
  background-color: var(--bg-canvas);
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  .menu-toggle {
    display: inline-block;
  }
}

/* Typography & Labels */
h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.2;
  font-weight: 700;
}

.mono-label, .badge, th, .spec-key, .step-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.badge-crimson {
  background-color: var(--accent-primary);
  color: var(--text-primary);
  border-color: var(--text-primary);
}

/* Hero Section - Solid near-black field, no hero image */
.hero-manual {
  padding: 4.5rem 0 3.5rem;
  background-color: var(--bg-canvas);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-manual h1 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  letter-spacing: -0.02em;
  max-width: 20ch;
  margin-bottom: 1.25rem;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 68ch;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
}

/* Solid crimson buttons with 4px 4px silver-dark offset shadows */
.btn-crimson {
  display: inline-block;
  background-color: var(--accent-primary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--text-primary);
  border-radius: 0;
  box-shadow: 4px 4px 0 #7a7e85;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  cursor: pointer;
}

.btn-crimson:hover,
.btn-crimson:focus-visible {
  color: var(--text-primary);
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 #7a7e85;
}

.btn-secondary {
  display: inline-block;
  background-color: var(--bg-surface);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 0.85rem 1.35rem;
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  box-shadow: 4px 4px 0 #3a3d42;
  transition: transform 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
  cursor: pointer;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  color: var(--text-primary);
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 #3a3d42;
}

/* Section Fields (Flat solid charcoal or crimson) */
.section-field {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
}

.section-field.charcoal-field {
  background-color: var(--bg-surface);
}

.section-field.crimson-field {
  background-color: #3b0d11;
}

.section-header {
  margin-bottom: 2.25rem;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  margin-top: 0.25rem;
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--text-muted);
  max-width: 68ch;
}

/* Square Translucent Panels with Backdrop Blur */
.glass-panel {
  background-color: rgba(11, 11, 13, 0.78);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  padding: 1.75rem;
  transition: transform 0.3s var(--ease-kinetic), box-shadow 0.3s var(--ease-kinetic);
}

.charcoal-field .glass-panel,
.crimson-field .glass-panel {
  background-color: rgba(11, 11, 13, 0.84);
}

.glass-panel:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevation);
}

/* Primary Launch Readiness Block + Two-Column Grid */
.launch-readiness-lead {
  margin-bottom: 2rem;
}

.two-col-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

@media (max-width: 768px) {
  .two-col-grid {
    grid-template-columns: 1fr;
  }
}

.auto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Static Launch-Readiness Sequence */
.sequence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.sequence-step {
  background-color: rgba(32, 25, 27, 0.85);
  border: 1px solid var(--border-subtle);
  padding: 1.25rem;
  border-top: 3px solid var(--accent-primary);
}

.sequence-step h3 {
  font-size: 1.05rem;
  margin: 0.4rem 0 0.5rem;
}

.sequence-step p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Equipment Attribute Rows */
.attr-list {
  margin-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.attr-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.92rem;
}

.attr-row .spec-val {
  font-family: var(--font-mono);
  color: var(--text-primary);
  text-align: right;
}

/* Images & Captions */
.media-frame {
  margin: 1.25rem 0;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
}

.media-frame.ratio-16-9 img {
  aspect-ratio: 16 / 9;
  width: 100%;
}

.media-frame.ratio-4-3 img {
  aspect-ratio: 4 / 3;
  width: 100%;
}

.media-caption {
  padding: 0.65rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  background-color: rgba(11, 11, 13, 0.9);
}

/* Stowage Checklist */
.checklist {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: rgba(11, 11, 13, 0.65);
  border: 1px solid var(--border-subtle);
  font-size: 0.95rem;
}

.check-box {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-subtle);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: rgba(11, 11, 13, 0.85);
  font-size: 0.92rem;
}

th, td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  background-color: var(--bg-surface);
  color: var(--text-muted);
}

/* Long-form prose */
.prose {
  max-width: 70ch;
}

.prose h2 {
  font-size: 1.65rem;
  margin: 2.25rem 0 0.85rem;
}

.prose h3 {
  font-size: 1.25rem;
  margin: 1.75rem 0 0.65rem;
}

.prose p {
  margin-bottom: 1.15rem;
  color: var(--text-primary);
}

.prose ul, .prose ol {
  margin: 0 0 1.25rem 1.5rem;
  color: var(--text-muted);
}

.prose li {
  margin-bottom: 0.5rem;
}

/* Avatars (Round exception) */
.avatar-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.avatar-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  border: 2px solid var(--text-muted);
  flex-shrink: 0;
}

/* Forms */
.form-grid {
  display: grid;
  gap: 1.25rem;
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent-primary);
  border-color: transparent;
}

.output-preview {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  color: var(--text-muted);
}

/* FAQ Accordion / Blocks */
.faq-item {
  margin-bottom: 1.25rem;
}

.faq-item h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.faq-item p {
  color: var(--text-muted);
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease-kinetic), transform 0.6s var(--ease-kinetic);
}

.reveal.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 2px solid var(--accent-primary);
  padding: 3.5rem 0 2.5rem;
  margin-top: 4rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}