/* ── Tokens ── */
:root {
  --c-bg: #ffffff;
  --c-bg-alt: #f4f6fb;
  --c-surface: #ffffff;
  --c-border: #e2e8f0;
  --c-text: #0f172a;
  --c-text-muted: #64748b;
  --c-accent: #2563eb;
  --c-accent-dark: #1d4ed8;
  --c-accent-light: #eff6ff;
  --c-nav-bg: rgba(255,255,255,0.85);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.10);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif;
}

[data-theme="dark"] {
  --c-bg: #0b0f1a;
  --c-bg-alt: #111827;
  --c-surface: #1e2535;
  --c-border: #2d3748;
  --c-text: #f1f5f9;
  --c-text-muted: #94a3b8;
  --c-accent: #3b82f6;
  --c-accent-dark: #2563eb;
  --c-accent-light: #1e3a5f;
  --c-nav-bg: rgba(11,15,26,0.85);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,.4);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  transition: background .25s, color .25s;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ── Layout ── */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
.nav-logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -.5px;
  color: var(--c-text);
}
.nav-logo span { color: var(--c-accent); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-text-muted);
  transition: color .15s;
}
.nav-links a:hover { color: var(--c-text); }
.nav-cta {
  background: var(--c-accent);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: background .15s !important;
}
.nav-cta:hover { background: var(--c-accent-dark) !important; }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  width: 36px; height: 36px;
  cursor: pointer;
  color: var(--c-text-muted);
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s, color .15s;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--c-accent); color: var(--c-accent); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  text-align: center;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 30%, transparent 100%);
  opacity: .5;
  z-index: 0;
}
.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-block;
  background: var(--c-accent-light);
  color: var(--c-accent);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
  border: 1px solid var(--c-accent);
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 24px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.hero-sub {
  font-size: 1.125rem;
  color: var(--c-text-muted);
  max-width: 620px;
  margin: 0 auto 40px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .15s;
  border: 2px solid transparent;
}
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: var(--c-accent-dark); }
.btn-ghost { background: transparent; color: var(--c-text); border-color: var(--c-border); }
.btn-ghost:hover { border-color: var(--c-accent); color: var(--c-accent); }
.btn-outline { background: transparent; color: var(--c-accent); border-color: var(--c-accent); }
.btn-outline:hover { background: var(--c-accent); color: #fff; }
.btn-full { width: 100%; text-align: center; }

/* ── Stats bar ── */
.stats-bar {
  background: var(--c-accent);
  padding: 40px 0;
}
.stats-inner {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 24px;
}
.stat { text-align: center; color: #fff; }
.stat-num { display: block; font-size: 2rem; font-weight: 700; letter-spacing: -.03em; }
.stat-label { font-size: .85rem; opacity: .8; }

/* ── Sections ── */
.section { padding: 96px 0; }
.section-alt { background: var(--c-bg-alt); }
.section-header { text-align: center; max-width: 680px; margin: 0 auto 64px; }
.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -.03em;
  margin-bottom: 16px;
}
.section-header p { color: var(--c-text-muted); font-size: 1.05rem; }

/* ── Feature cards ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow .2s, transform .2s;
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-icon { font-size: 2rem; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; }
.feature-card p { color: var(--c-text-muted); font-size: .925rem; line-height: 1.7; }

/* ── Use cases ── */
.use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}
.use-case {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 40px;
}
.use-case-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 12px;
}
.use-case h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 20px; }
.use-case ul { list-style: none; margin-bottom: 28px; }
.use-case ul li {
  padding: 8px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: .925rem;
  color: var(--c-text-muted);
  padding-left: 20px;
  position: relative;
}
.use-case ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--c-accent);
}

/* ── Pilots ── */
.pilots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.pilot-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
}
.pilot-region {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 12px;
}
.pilot-card p { color: var(--c-text-muted); font-size: .925rem; line-height: 1.7; }
.pilots-note {
  text-align: center;
  color: var(--c-text-muted);
  font-size: .95rem;
}

/* ── Contact ── */
.section-contact { background: var(--c-bg-alt); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact-copy h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -.03em;
  margin-bottom: 16px;
}
.contact-copy p { color: var(--c-text-muted); font-size: 1rem; margin-bottom: 24px; line-height: 1.7; }
.contact-email {
  display: inline-block;
  color: var(--c-accent);
  font-weight: 600;
  font-size: 1.05rem;
  border-bottom: 2px solid var(--c-accent);
  padding-bottom: 2px;
}
.contact-form {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--c-text);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  font-size: .925rem;
  transition: border-color .15s;
  outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--c-text-muted); }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--c-accent); }
.form-group textarea { resize: vertical; }

/* ── Footer ── */
.footer {
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  padding: 48px 0 32px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}
.footer-brand p { color: var(--c-text-muted); font-size: .875rem; margin-top: 8px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--c-text-muted); font-size: .875rem; transition: color .15s; }
.footer-links a:hover { color: var(--c-accent); }
.footer-copy { color: var(--c-text-muted); font-size: .8rem; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 80px 0 64px; }
  .section { padding: 64px 0; }
}