:root {
  --blue: #0b3a6d;
  --blue-ink: #0a2e56;
  --yellow: #f4d13d;
  --bg: #f7f8fb;
  --ink: #0f172a;
  --muted: #5b667a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Avenir Next", "Avenir", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(1200px 800px at 15% -10%, #e9f1ff 0%, #f7f8fb 55%, #ffffff 100%);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.hero {
  display: grid;
  gap: 24px;
  align-items: center;
}

.logo {
  width: 84px;
  height: 84px;
  border-radius: 18px;
  background: var(--blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--yellow);
  font-weight: 800;
  letter-spacing: 1px;
  font-size: 34px;
  box-shadow: 0 10px 30px rgba(11, 58, 109, 0.25);
}

h1 {
  margin: 0;
  font-size: 40px;
  line-height: 1.1;
}

.tagline {
  margin: 8px 0 0;
  font-size: 18px;
  color: var(--muted);
}

.badges {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.store-btn {
  padding: 12px 18px;
  border-radius: 12px;
  background: #111827;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
}

.store-btn.secondary {
  background: #1f2937;
}

.section {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid #e5e7eb;
}

.links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.links a {
  color: var(--blue-ink);
  text-decoration: none;
  font-weight: 600;
}

.footer {
  margin-top: 40px;
  font-size: 13px;
  color: var(--muted);
}

.doc h1 { font-size: 30px; }
.doc h2 { font-size: 18px; margin-top: 28px; }
.doc p, .doc li { color: #1f2937; line-height: 1.6; }
.doc a { color: var(--blue-ink); }

@media (min-width: 720px) {
  .hero { grid-template-columns: 120px 1fr; }
}