:root {
  --ink: #0b1f3a;
  --blue: #007aff;
  --blue-deep: #005bb5;
  --page: #f4f6f8;
  --surface: #ffffff;
  --text: #222;
  --muted: #5c6570;
  --line: #e8eaed;
  --radius: 12px;
  --max: 800px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--page);
  line-height: 1.65;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  background: rgba(11, 31, 58, 0.94);
}
.brand {
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}
.brand:hover { text-decoration: none; color: #fff; }
.nav-links { display: flex; gap: 6px; flex-wrap: wrap; }
.nav-links a {
  color: #dbe7f5;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 999px;
}
.nav-links a:hover,
.nav-links a.is-active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  text-decoration: none;
}

.wrap {
  max-width: var(--max);
  margin: 24px auto 48px;
  background: var(--surface);
  padding: 36px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

h1 {
  color: var(--blue);
  text-align: center;
  margin: 0 0 12px;
}
h2 {
  color: #444;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  margin-top: 32px;
}
.lead {
  text-align: center;
  font-size: 1.15rem;
  color: var(--muted);
  margin-bottom: 24px;
}
.app-preview {
  margin: 0 0 28px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #0f1115;
  box-shadow: 0 12px 28px rgba(11, 31, 58, 0.12);
}
.app-preview img {
  display: block;
  width: 100%;
  height: auto;
}
ul { margin: 0 0 16px 20px; }
li { margin-bottom: 6px; }
p { margin: 0 0 14px; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 28px 0 8px;
}
.store-btn {
  display: inline-block;
  min-width: 200px;
  padding: 14px 20px;
  background: var(--blue);
  color: #fff;
  text-align: center;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 700;
}
.store-btn:hover {
  background: var(--blue-deep);
  color: #fff;
  text-decoration: none;
}
.store-btn.ghost {
  background: transparent;
  color: var(--blue);
  border: 2px solid var(--blue);
}

.highlight {
  background: #f8f9fa;
  padding: 15px;
  border-left: 4px solid var(--blue);
  margin: 20px 0;
}

.foot {
  text-align: center;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: #888;
}

@media (max-width: 640px) {
  .wrap { margin: 12px; padding: 24px 18px; }
  .nav { padding: 12px 14px; }
}