:root {
  --primary: #0f6fec;
  --primary-dark: #0a52b0;
  --text: #1f2937;
  --muted: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f3f6fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

.nav { position: sticky; top: 0; background: #fff; border-bottom: 1px solid #e5e7eb; z-index: 10; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 1.4rem; color: var(--primary); }
.nav a { margin-left: 20px; color: var(--text); text-decoration: none; }
.nav a:hover { color: var(--primary); }

.hero {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 96px 0;
  text-align: center;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 16px; }
.hero p { max-width: 640px; margin: 0 auto 32px; opacity: .9; }

.btn {
  display: inline-block;
  background: #fff;
  color: var(--primary);
  padding: 12px 28px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.section { padding: 64px 16px; }
.section.alt { background: var(--bg-alt); }
.section h2 { margin-top: 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card { border: 1px solid #e5e7eb; border-radius: 12px; padding: 24px; }
.card h3 { margin-top: 0; color: var(--primary); }
.card p { color: var(--muted); margin-bottom: 0; }

.footer { border-top: 1px solid #e5e7eb; padding: 24px 0; color: var(--muted); text-align: center; }

@media (max-width: 600px) {
  .nav a { margin-left: 12px; font-size: .9rem; }
}