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

body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
}

header {
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
}

nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav a {
  text-decoration: none;
  color: #444;
}

nav a:hover {
  color: #000;
}

.hero {
  text-align: center;
  padding: 6rem 2rem;
  background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  color: #555;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  background: #2563eb;
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
}

.btn:hover {
  background: #1d4ed8;
}

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 1.5rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

footer {
  text-align: center;
  padding: 2rem;
  background: #1a1a1a;
  color: #aaa;
  font-size: 0.875rem;
}

@media (max-width: 600px) {
  nav ul {
    gap: 1rem;
    font-size: 0.875rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }
}