body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background-color: #f9fafb;
  color: #222;
}

header {
  background-color: #0b3954;
  color: white;
  text-align: center;
  padding: 2rem 1rem;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

nav {
  display: flex;
  justify-content: center;
  background-color: #13315c;
}

nav a {
  color: white;
  padding: 0.8rem 1.5rem;
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  background-color: #1e5f74;
}

section {
  max-width: 900px;
  margin: 2rem auto;
  padding: 1rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

section h2 {
  color: #0b3954;
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: #0b3954;
  color: white;
  margin-top: 2rem;
}