:root {
  --bg: #0b1622;
  --bg-2: #0f1e30;
  --panel: #13273c;
  --ink: #eaf1f8;
  --muted: #9db2c9;
  --accent: #38bdf8;
  --accent-2: #f5b301;
  --line: rgba(157, 178, 201, 0.18);
  --radius: 16px;
  --max: 1120px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(56, 189, 248, 0.12), transparent 60%),
    radial-gradient(900px 500px at 0% 10%, rgba(245, 179, 1, 0.06), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Faint aircraft-sketch watermark behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: url("/n167da.jpg") no-repeat center center;
  background-size: cover;
  opacity: 0.08;
  filter: grayscale(1) contrast(0.85);
  pointer-events: none;
}

/* Header */
.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { text-decoration: none; }
.brand-mark {
  font-weight: 800;
  font-size: 26px;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.brand-mark.small { font-size: 20px; }
.brand-accent { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav a:hover { color: var(--ink); }
.nav-cta {
  border: 1px solid var(--line);
  padding: 8px 16px;
  border-radius: 999px;
  color: var(--ink) !important;
}

/* Hero */
.hero {
  max-width: var(--max);
  margin: 10px auto 6px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-content: center;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(32px, 4.6vw, 50px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
}
.lede { color: var(--muted); font-size: 18px; max-width: 34ch; margin: 0 0 12px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.tail-note { margin-top: 12px; color: var(--muted); font-size: 14px; }

.btn {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: transform 0.05s ease, background 0.2s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #04121d; }
.btn-primary:hover { background: #5cc9fa; }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); }

/* Sections */
section { max-width: var(--max); margin: 0 auto; padding: 22px 24px; }
h2 { font-size: clamp(24px, 3vw, 32px); letter-spacing: -0.02em; margin: 0 0 14px; }

.features .grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.disclaimer { color: var(--muted); font-size: 13px; max-width: 62ch; margin-top: 26px; }

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px 20px;
  display: flex; align-items: center; justify-content: space-between;
  color: var(--muted); font-size: 14px;
  border-top: 1px solid var(--line);
}

/* Responsive */
@media (max-width: 900px) {
  .hero { gap: 14px; }
  .features .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .features .grid { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; gap: 8px; }
}