:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1a1d23;
  --muted: #5b6472;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --border: #e5e7eb;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 8px 24px rgba(16, 24, 40, 0.06);
  --shadow-hover: 0 4px 8px rgba(16, 24, 40, 0.08), 0 16px 40px rgba(16, 24, 40, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---------- Top banner ---------- */
.banner {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.banner-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand-mark { color: var(--accent); }
.brand-tld { color: var(--muted); font-weight: 600; }

.banner-nav { display: flex; gap: 22px; }

.banner-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.banner-nav a:hover { color: var(--text); }

/* ---------- Main ---------- */
main {
  flex: 1;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 72px 0 40px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

.hero-sub strong { color: var(--text); }

/* Apps */
.apps { padding: 24px 0 80px; }

.section-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: #d3d7de;
}

.card-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 14px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.card-desc {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 18px;
  flex: 1;
}

.card-cta {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
}

.card:hover .card-cta { color: var(--accent-hover); }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
  padding: 28px 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer p { margin: 4px 0; }
.footer strong { color: var(--text); }
.footer-copy { font-size: 0.8rem; opacity: 0.8; }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .hero { padding: 48px 0 28px; }
  .banner-nav { gap: 16px; }
}