:root {
  --brand: #1F3A5F;
  --accent: #19B7B3;
  --highlight: #3ED4CF;
  --bg-main: #F7F9FB;
  --bg-card: #FFFFFF;
  --border: #E6ECF1;
  --text-primary: #1B263B;
  --text-secondary: #6B7C93;
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-main: #0F172A;
    --bg-card: #111827;
    --border: #374151;
    --text-primary: #E5E7EB;
    --text-secondary: #9CA3AF;
    --brand: #1F3A5F;
    --accent: #19B7B3;
    --highlight: #3ED4CF;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg-main);
  color: var(--text-primary);
}
.container { width: min(1100px, 92%); margin-inline: auto; }

.site-header {
  background: var(--brand);
  border-bottom: 1px solid rgba(255,255,255,.12);
  position: sticky;
  top: 0;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { color: #fff; text-decoration: none; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.brand-logo {
  height: 44px;
  width: auto;
  display: block;
  border-radius: 8px;
}
.nav-link {
  color: #fff;
  text-decoration: none;
  padding: 8px 14px;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 10px;
}
.nav-link:hover { border-color: var(--highlight); color: var(--highlight); }

.hero { padding: 64px 0 40px; }
.badge {
  display: inline-block;
  margin: 0 0 10px;
  color: var(--accent);
  font-weight: 700;
}
h1 { margin: 0 0 14px; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; }
.lead { max-width: 760px; color: var(--text-secondary); font-size: 1.1rem; }
.cta-row { margin-top: 24px; }
.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 700;
}
.btn-primary {
  background: var(--accent);
  color: #042b2a;
}
.btn-primary:hover { background: var(--highlight); }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding-bottom: 56px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}
.card h2 { margin-top: 0; font-size: 1.1rem; }
.card p { color: var(--text-secondary); margin-bottom: 0; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0 28px;
  color: var(--text-secondary);
}