/* ===== Fly General Technology - Design System ===== */
:root {
  --navy-950: #060f1e;
  --navy-900: #0a1628;
  --navy-800: #0f1f3a;
  --navy-700: #162a4a;
  --navy-600: #1e3a5f;
  --navy-500: #2a4d7a;
  --accent: #f47920;
  --accent-hover: #e06810;
  --accent-soft: rgba(244, 121, 32, 0.12);
  --accent-glow: rgba(244, 121, 32, 0.25);
  --text-primary: #e8ecf1;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --surface-card: rgba(255, 255, 255, 0.03);
  --surface-elevated: rgba(255, 255, 255, 0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--navy-950);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Typography ===== */
h1, h2, h3, h4, h5 { font-weight: 600; line-height: 1.25; }
h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title {
  margin-bottom: 16px;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
  line-height: 1.7;
}

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(6, 15, 30, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s;
}
.nav.scrolled { background: rgba(6, 15, 30, 0.96); }
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; color: var(--text-primary); }
.nav-logo img { height: 32px; }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  color: var(--text-secondary); font-size: 0.9rem; font-weight: 500;
  padding: 6px 0; position: relative; transition: color 0.2s;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--accent); transform: scaleX(0); transition: transform 0.25s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-cta {
  background: var(--accent); color: #fff; border: none; padding: 8px 20px;
  border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 600;
  cursor: pointer; transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--accent-hover); transform: translateY(-1px); }
.mobile-toggle {
  display: none; background: none; border: none; color: var(--text-primary);
  font-size: 1.5rem; cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 100px 0 80px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -20%; right: -10%; width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  opacity: 0.3; pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 200px;
  background: linear-gradient(to top, var(--navy-950), transparent);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 660px; }
.hero-content h1 { margin-bottom: 20px; }
.hero-content p {
  font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 36px;
  max-width: 560px; line-height: 1.7;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
  border-radius: var(--radius-sm); font-size: 0.95rem; font-weight: 600;
  border: none; cursor: pointer; transition: all 0.2s; font-family: var(--font-sans);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px var(--accent-glow); }
.btn-outline {
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-default);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.hero-visual {
  position: absolute; right: -80px; top: 50%; transform: translateY(-50%);
  width: 560px; opacity: 0.9; z-index: 0;
}
.hero-visual img { width: 100%; }

/* ===== Stats Bar ===== */
.stats-bar {
  background: var(--surface-elevated); border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  max-width: 1000px; margin: 0 auto;
}
.stat-item {
  text-align: center; padding: 40px 20px;
  border-right: 1px solid var(--border-subtle);
}
.stat-item:last-child { border-right: none; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* ===== Sections ===== */
.section { padding: 100px 0; }
.section-dark { background: var(--navy-900); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header .section-desc { margin: 0 auto; }

/* ===== Feature Cards ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px; margin-top: 40px;
}
.feature-card {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 32px 28px; transition: all 0.3s;
}
.feature-card:hover {
  border-color: var(--border-default); transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.feature-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--accent-soft); display: flex; align-items: center;
  justify-content: center; font-size: 1.4rem; margin-bottom: 20px;
}
.feature-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* ===== Product Cards ===== */
.products-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); overflow: hidden; transition: all 0.3s;
}
.product-card:hover {
  border-color: var(--border-default); transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.product-card-img {
  height: 200px; background: var(--surface-elevated);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.product-card-img img { max-height: 160px; object-fit: contain; }
.product-card-body { padding: 24px; }
.product-card-body h3 { margin-bottom: 4px; }
.product-card-body .product-series {
  font-size: 0.8rem; color: var(--accent); font-weight: 600; margin-bottom: 12px;
}
.product-card-body .product-specs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px;
  margin-bottom: 16px;
}
.product-card-body .spec-item { display: flex; flex-direction: column; }
.product-card-body .spec-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.product-card-body .spec-value { font-size: 0.9rem; color: var(--text-primary); font-weight: 500; font-family: var(--font-mono); }
.product-card-body .btn { width: 100%; justify-content: center; }

/* ===== Product Detail ===== */
.product-detail { display: none; }
.product-detail.active { display: block; }
.product-detail-header { padding-top: 100px; padding-bottom: 40px; }
.product-detail-header .back-link {
  display: inline-flex; align-items: center; gap: 6px; color: var(--text-muted);
  font-size: 0.9rem; margin-bottom: 24px; transition: color 0.2s;
}
.product-detail-header .back-link:hover { color: var(--accent); }
.product-detail-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start;
}
.product-detail-img {
  background: var(--surface-elevated); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center; padding: 40px;
  min-height: 360px; border: 1px solid var(--border-subtle);
}
.product-detail-img img { max-height: 300px; }
.product-detail-info h1 { margin-bottom: 8px; }
.product-detail-info .series-tag {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600;
  margin-bottom: 20px;
}
.product-detail-info .desc { color: var(--text-secondary); margin-bottom: 28px; line-height: 1.7; }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--border-subtle); }
.specs-table td { padding: 10px 0; }
.specs-table td:first-child { color: var(--text-muted); font-size: 0.85rem; width: 40%; }
.specs-table td:last-child { color: var(--text-primary); font-size: 0.9rem; font-weight: 500; }

/* ===== Application Cards ===== */
.app-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.app-card {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 36px 28px; text-align: center;
  transition: all 0.3s;
}
.app-card:hover {
  border-color: var(--border-default); transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.app-icon {
  font-size: 2.5rem; margin-bottom: 20px; display: block;
}
.app-card h3 { margin-bottom: 8px; }
.app-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }
.app-platforms {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px;
}
.app-tag {
  background: var(--accent-soft); color: var(--accent); padding: 3px 10px;
  border-radius: 20px; font-size: 0.75rem; font-weight: 500;
}

/* ===== About ===== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-content h2 { margin-bottom: 20px; }
.about-content p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.7; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 32px; }
.value-item {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 20px;
}
.value-item .icon { font-size: 1.3rem; margin-bottom: 8px; display: block; }
.value-item h4 { font-size: 0.95rem; margin-bottom: 4px; }
.value-item p { color: var(--text-muted); font-size: 0.82rem; margin: 0; }
.about-image {
  background: var(--surface-elevated); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  padding: 40px; min-height: 400px; border: 1px solid var(--border-subtle);
}
.about-image img { max-height: 320px; }

/* ===== Ecosystem ===== */
.ecosystem-logos {
  display: flex; flex-wrap: wrap; gap: 40px; justify-content: center;
  align-items: center; margin-top: 40px;
}
.ecosystem-logos span {
  color: var(--text-muted); font-size: 1.1rem; font-weight: 600;
  letter-spacing: 0.05em; opacity: 0.6; transition: opacity 0.3s;
}
.ecosystem-logos span:hover { opacity: 1; color: var(--text-secondary); }

/* ===== Product Comparison Table ===== */
.comparison-wrapper { overflow-x: auto; margin-top: 40px; }
.comparison-table {
  width: 100%; border-collapse: collapse; font-size: 0.85rem;
  min-width: 900px;
}
.comparison-table thead th {
  text-align: left; padding: 14px 16px; background: var(--surface-elevated);
  border-bottom: 1px solid var(--border-default); font-weight: 600;
  color: var(--text-primary); white-space: nowrap;
}
.comparison-table thead th:first-child {
  position: sticky; left: 0; background: var(--navy-900); z-index: 2;
}
.comparison-table tbody td {
  padding: 12px 16px; border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary); white-space: nowrap;
}
.comparison-table tbody td:first-child {
  font-weight: 500; color: var(--text-primary);
  position: sticky; left: 0; background: var(--navy-950); z-index: 1;
}
.comparison-table tbody tr:hover td {
  background: var(--surface-card);
}
.comparison-table tbody tr:hover td:first-child {
  background: var(--surface-card);
}

/* ===== Contact ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
}
.contact-info h2 { margin-bottom: 16px; }
.contact-info .desc { color: var(--text-secondary); margin-bottom: 32px; }
.contact-methods { display: flex; flex-direction: column; gap: 20px; }
.contact-method {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 20px; background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}
.contact-method .cm-icon {
  font-size: 1.4rem; width: 44px; height: 44px; display: flex;
  align-items: center; justify-content: center; border-radius: var(--radius-sm);
  background: var(--accent-soft); flex-shrink: 0;
}
.contact-method h4 { font-size: 0.95rem; margin-bottom: 4px; }
.contact-method p { color: var(--text-secondary); font-size: 0.9rem; }
.contact-form {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 36px;
}
.contact-form h3 { margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 500; margin-bottom: 6px; color: var(--text-secondary);
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px; background: var(--navy-950);
  border: 1px solid var(--border-default); border-radius: var(--radius-sm);
  color: var(--text-primary); font-family: var(--font-sans); font-size: 0.9rem;
  transition: border-color 0.2s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; margin-top: 8px; }

/* ===== CTA Section ===== */
.cta-section {
  text-align: center; padding: 100px 0;
  background: linear-gradient(180deg, transparent, var(--accent-soft), transparent);
}
.cta-section h2 { margin-bottom: 16px; }
.cta-section p { color: var(--text-secondary); margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* ===== Footer ===== */
.footer {
  background: var(--navy-900); border-top: 1px solid var(--border-subtle);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo { font-weight: 700; font-size: 1.2rem; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand .logo img { height: 28px; }
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; line-height: 1.6; }
.footer-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-secondary); font-size: 0.9rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border-subtle); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text-muted); font-size: 0.82rem;
}

/* ===== Page Header ===== */
.page-header {
  padding: 120px 0 60px; text-align: center;
}
.page-header h1 { margin-bottom: 12px; }
.page-header p { color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

/* ===== Product Filters ===== */
.product-filters {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px;
}
.filter-btn {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  color: var(--text-secondary); padding: 8px 20px; border-radius: 20px;
  font-size: 0.85rem; font-weight: 500; cursor: pointer; transition: all 0.2s;
  font-family: var(--font-sans);
}
.filter-btn:hover { border-color: var(--border-default); color: var(--text-primary); }
.filter-btn.active {
  background: var(--accent-soft); border-color: var(--accent); color: var(--accent);
}

/* ===== Video Section ===== */
.video-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); overflow: hidden;
}
.video-card video {
  width: 100%; display: block; background: #000;
}
.video-card-body { padding: 20px; }
.video-card-body h4 { margin-bottom: 4px; font-size: 0.95rem; }
.video-card-body p { color: var(--text-muted); font-size: 0.82rem; }

/* ===== Animations ===== */
.fade-in {
  opacity: 1;
}
.fade-in.visible { opacity: 1; }

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .mobile-toggle { display: block; }

  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.1rem; }

  .section { padding: 48px 0; }
  .section-dark { padding: 48px 0; }
  .section-header { margin-bottom: 32px; }
  .section-desc { font-size: 0.9rem; }

  /* Hero */
  .hero { min-height: auto; padding: 100px 0 48px; }
  .hero-content { max-width: 100%; }
  .hero-content p { font-size: 0.95rem; margin-bottom: 24px; }
  .hero-visual { display: none; }
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-btns .btn { width: 100%; justify-content: center; }

  /* Page Header */
  .page-header { padding: 96px 0 40px; }

  /* Stats */
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { padding: 24px 12px; }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-value { font-size: 1.4rem; }

  /* Features */
  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 24px 20px; }

  /* Products */
  .products-grid { grid-template-columns: 1fr; gap: 16px; }
  .product-card-img { height: 180px; }
  .product-card-img img { max-height: 140px; }
  .product-card-body .product-specs { grid-template-columns: 1fr 1fr; }
  .product-filters { gap: 8px; }
  .filter-btn { font-size: 0.78rem; padding: 6px 14px; }

  /* Apps */
  .app-grid { grid-template-columns: 1fr; gap: 16px; }
  .app-card { padding: 28px 20px; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-image { min-height: 240px; padding: 24px; }
  .about-image img { max-height: 200px; }
  .about-values { grid-template-columns: 1fr; gap: 12px; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-form { padding: 24px 20px; }
  .contact-methods { gap: 12px; }

  /* Comparison */
  .comparison-wrapper { margin-top: 20px; }
  .comparison-table { font-size: 0.72rem; min-width: 100%; }

  /* Ecosystem */
  .ecosystem-logos { gap: 24px; }
  .ecosystem-logos span { font-size: 0.9rem; }

  /* Footer */
  .footer { padding: 40px 0 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; font-size: 0.75rem; }

  /* CTA */
  .cta-section { padding: 60px 0; }
  .cta-section h2 { font-size: 1.4rem; }
  .cta-section .btn { width: 100%; max-width: 280px; }

  /* Buttons */
  .btn { padding: 10px 20px; font-size: 0.88rem; }
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--navy-950); z-index: 99; display: none;
  flex-direction: column; padding: 40px 24px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--text-secondary); font-size: 1.1rem; padding: 16px 0;
  border-bottom: 1px solid var(--border-subtle); font-weight: 500;
}
.mobile-menu .btn-primary { margin-top: 24px; text-align: center; justify-content: center; }