/* ==========================================================================
   HeliAviator Labs LLC - Modern Dark Aerospace Stylesheet
   Designed for: heliaviatorlabs.com (Transitioning from Heli-av8er)
   Zero external dependencies. Pure modern CSS.
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-surface: #141d33;
  --bg-surface-elevated: #1a2542;
  --bg-glass: rgba(15, 23, 42, 0.78);
  --bg-card: rgba(20, 29, 51, 0.65);
  --bg-card-hover: rgba(27, 40, 70, 0.85);

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-accent: rgba(56, 189, 248, 0.35);
  --border-emerald: rgba(16, 185, 129, 0.35);

  /* Avionics & Telemetry Accent Colors */
  --cyan-primary: #38bdf8;
  --cyan-hover: #0ea5e9;
  --cyan-glow: rgba(56, 189, 248, 0.2);
  --emerald-primary: #10b981;
  --emerald-hover: #059669;
  --emerald-glow: rgba(16, 185, 129, 0.2);
  --amber-primary: #f59e0b;
  --amber-glow: rgba(245, 158, 11, 0.2);
  --rose-primary: #f43f5e;

  /* Typography Colors */
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-subtle: #64748b;
  --text-inverted: #090d16;

  /* Fonts */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  /* Sizing & Layout */
  --max-width: 1240px;
  --nav-height: 72px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 35px var(--cyan-glow);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(56, 189, 248, 0.12), transparent 70%),
    radial-gradient(circle at 100% 40%, rgba(16, 185, 129, 0.05), transparent 45%),
    radial-gradient(circle at 0% 80%, rgba(56, 189, 248, 0.04), transparent 40%);
  background-attachment: fixed;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 2px solid var(--cyan-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Typography Utilities */
h1, h2, h3, h4 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

a {
  color: var(--cyan-primary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

a:hover {
  color: #7dd3fc;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-logo-badge {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #0284c7, #0369a1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 0 15px rgba(2, 132, 199, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: 0.72rem;
  color: var(--cyan-primary);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links-desktop {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links-desktop a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
}

.nav-links-desktop a:hover,
.nav-links-desktop a.active {
  color: var(--text-main);
}

.nav-links-desktop a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cyan-primary);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan-primary), #0284c7);
  color: #070d18;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #7dd3fc, var(--cyan-primary));
  color: #040912;
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: var(--cyan-primary);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-appstore {
  background: #000000;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.btn-appstore:hover {
  background: #111827;
  color: #ffffff;
  border-color: var(--cyan-primary);
  transform: translateY(-1px);
}

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--text-main);
  cursor: pointer;
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
  display: block;
}

/* Mobile Navigation Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 100%;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-medium);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

.mobile-drawer.open {
  display: block;
}

@media (min-width: 769px) {
  .mobile-drawer,
  .mobile-drawer.open {
    display: none !important;
  }
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-links a {
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 500;
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-drawer-cta {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ==========================================================================
   Hero Section & Brand Evolution Banner
   ========================================================================== */
.hero-section {
  padding: 70px 0 50px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.badge-aero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cyan-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--emerald-primary);
  box-shadow: 0 0 8px var(--emerald-primary);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.4rem, 4vw + 1rem, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.text-gradient {
  background: linear-gradient(135deg, #ffffff 40%, var(--cyan-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

/* Brand Evolution Alert Box */
.brand-evolution-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.8));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.brand-evolution-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
}

.brand-evolution-text h4 {
  font-size: 0.98rem;
  margin-bottom: 4px;
  color: #ffffff;
}

.brand-evolution-text p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.brand-evolution-text .highlight-link {
  color: var(--cyan-primary);
  font-weight: 600;
}

/* Interactive Hero Demo: Avionics Fuel Calc */
.hero-widget-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.widget-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.widget-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--emerald-primary);
  border: 1px solid var(--border-emerald);
}

.fuel-demo-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fuel-type-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: var(--bg-primary);
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.fuel-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 8px 12px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.fuel-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--cyan-primary);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-accent);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.fuel-input {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 12px 60px 12px 14px;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  outline: none;
  transition: border-color 0.2s ease;
}

.fuel-input:focus {
  border-color: var(--cyan-primary);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
}

.input-unit-tag {
  position: absolute;
  right: 14px;
  color: var(--text-subtle);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}

/* Avionics Conversion Grid Output */
.avionics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 6px;
}

.avionics-cell {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.avionics-cell-label {
  font-size: 0.75rem;
  color: var(--text-subtle);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.avionics-cell-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan-primary);
}

.avionics-cell.highlight {
  border-color: var(--border-emerald);
}

.avionics-cell.highlight .avionics-cell-value {
  color: var(--emerald-primary);
}

.widget-footer-note {
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--text-subtle);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   Flagship Apps Section
   ========================================================================== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  font-weight: 600;
}

.section-title {
  font-size: clamp(2rem, 3vw + 0.5rem, 2.8rem);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* App Showcase Detailed Grid */
.flagship-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.app-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), 0 0 25px rgba(56, 189, 248, 0.1);
  transform: translateY(-2px);
}

.app-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.badge-pill {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.badge-pill.cyan {
  color: var(--cyan-primary);
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--border-accent);
}

.badge-pill.emerald {
  color: var(--emerald-primary);
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--border-emerald);
}

.app-meta-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.app-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.4);
}

.icon-aviation {
  background: linear-gradient(135deg, #0284c7, #075985);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.icon-dyno {
  background: linear-gradient(135deg, #10b981, #047857);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.app-title-wrap h3 {
  font-size: 1.75rem;
  margin-bottom: 4px;
}

.app-tagline {
  color: var(--cyan-primary);
  font-size: 0.92rem;
  font-weight: 500;
}

.app-description {
  margin-bottom: 24px;
  font-size: 1rem;
}

.feature-checklist {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
  margin-bottom: 28px;
}

.feature-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.feature-checklist svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--emerald-primary);
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* App Mockup Visual Displays */
.app-mockup-frame {
  background: var(--bg-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), var(--shadow-md);
  font-family: var(--font-mono);
}

.mockup-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-subtle);
}

.cockpit-display-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: 0.85rem;
}

.cockpit-display-row .label {
  color: var(--text-secondary);
}

.cockpit-display-row .value {
  color: #ffffff;
  font-weight: 600;
}

.cockpit-display-row.primary-stat {
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid var(--border-accent);
}

.cockpit-display-row.primary-stat .value {
  color: var(--cyan-primary);
  font-size: 1rem;
}

.dyno-curve-visual {
  height: 120px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  margin-bottom: 14px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 0 10px;
}

.dyno-svg-chart {
  width: 100%;
  height: 100%;
}

.safety-callout {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--amber-glow);
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.8rem;
  color: #fcd34d;
  line-height: 1.4;
}

/* ==========================================================================
   Aviation Utilities Suite Section
   ========================================================================== */
.suite-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.suite-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.suite-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.suite-card-top {
  margin-bottom: 24px;
}

.suite-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--cyan-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.suite-card h4 {
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.suite-features {
  list-style: none;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.suite-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.suite-features svg {
  color: var(--cyan-primary);
  flex-shrink: 0;
}

.suite-card-footer {
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-badge-legacy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-subtle);
}

/* ==========================================================================
   App Store Support Center & FAQ Accordion
   ========================================================================== */
.support-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.support-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.support-contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
}

.support-contact-card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.support-sla-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid var(--border-emerald);
  color: var(--emerald-primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.contact-channel-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.contact-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--cyan-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-details {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.76rem;
  text-transform: uppercase;
  color: var(--text-subtle);
  letter-spacing: 0.05em;
  font-weight: 600;
}

.contact-val {
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.95rem;
}

.guidelines-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.guidelines-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: #ffffff;
}

.guidelines-card ul {
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* FAQ Accordion Component */
.faq-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-category-header {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--cyan-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 16px 0 6px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-item.active {
  border-color: var(--border-accent);
  background: var(--bg-surface);
}

.faq-trigger {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 18px 22px;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--cyan-primary);
  transition: transform 0.25s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-body {
  display: none;
  padding: 0 22px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-body {
  display: block;
  border-top-color: var(--border-subtle);
  padding-top: 14px;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-card {
  background: linear-gradient(135deg, rgba(20, 29, 51, 0.7), rgba(15, 23, 42, 0.8));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-text h3 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.about-text p {
  margin-bottom: 16px;
}

.pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.pillar-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.pillar-icon {
  width: 32px;
  height: 32px;
  color: var(--cyan-primary);
  margin-bottom: 10px;
}

.pillar-box h5 {
  font-size: 1rem;
  color: #ffffff;
  margin-bottom: 4px;
}

.pillar-box p {
  font-size: 0.85rem;
  color: var(--text-subtle);
  line-height: 1.4;
}

/* ==========================================================================
   Privacy Policy Page Styles
   ========================================================================== */
.privacy-page-header {
  padding: 60px 0 30px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 48px;
}

.privacy-page-header h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  margin-bottom: 12px;
}

.privacy-timestamp {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--cyan-primary);
}

.privacy-content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
  margin-bottom: 80px;
}

.privacy-section {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-subtle);
}

.privacy-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.privacy-section h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 12px;
}

.privacy-section h2 svg {
  color: var(--cyan-primary);
}

.privacy-section p {
  margin-bottom: 14px;
}

.privacy-section ul {
  padding-left: 24px;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.privacy-section li {
  margin-bottom: 8px;
}

.callout-box {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--emerald-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 20px 0;
}

.callout-box.warning {
  background: rgba(245, 158, 11, 0.08);
  border-left-color: var(--amber-primary);
}

.callout-box h4 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: #ffffff;
}

.callout-box p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #06090f;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 36px;
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h4 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.92rem;
  max-width: 360px;
  margin-bottom: 16px;
}

.footer-col h5 {
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--cyan-primary);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-legal-copy {
  font-size: 0.82rem;
  color: var(--text-subtle);
  line-height: 1.6;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .app-card {
    grid-template-columns: 1fr;
  }
  
  .support-grid {
    grid-template-columns: 1fr;
  }
  
  .about-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .container {
    padding: 0 16px;
  }
  
  .nav-links-desktop,
  .nav-actions .btn {
    display: none;
  }

  .brand-name {
    font-size: 1.05rem;
    white-space: nowrap;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .suite-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-checklist {
    grid-template-columns: 1fr;
  }
  
  .app-card {
    padding: 24px;
  }
  
  .about-card {
    padding: 28px;
  }
  
  .privacy-content-card {
    padding: 24px;
  }
  
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-ctas {
    flex-direction: column;
  }
  
  .hero-ctas .btn {
    width: 100%;
  }
  
  .avionics-grid {
    grid-template-columns: 1fr;
  }
}