* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b1220;
  color: #ffffff;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 80px 20px;
}

.hero {
  background: linear-gradient(135deg, #0f172a, #1e3a8a);
  text-align: center;
  padding: 120px 20px;
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: 15px;
}

.tagline {
  font-size: 1.3rem;
  color: #cbd5e1;
}

.buttons {
  margin-top: 30px;
}

.btn {
  display: inline-block;
  padding: 14px 24px;
  border-radius: 10px;
  margin: 10px;
  text-decoration: none;
  font-weight: bold;
}

.primary {
  background: #2563eb;
  color: white;
}

.secondary {
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
}

nav {
  background: #111827;
  padding: 18px;
  position: sticky;
  top: 0;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 0;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

h2 {
  margin-bottom: 30px;
  font-size: 2.5rem;
  color: #93c5fd;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.card {
  background: #111827;
  padding: 30px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
}

.card h3 {
  color: #60a5fa;
  margin-bottom: 15px;
}

footer {
  text-align: center;
  padding: 40px 20px;
  background: #111827;
  color: #94a3b8;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .nav-links {
    flex-wrap: wrap;
  }
}