body {
  font-family: Arial, Helvetica, sans-serif;
  color: #222;
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
  line-height: 1.6;
}

nav {
  background: #0b3c5d;
  padding: 10px;
  margin-bottom: 20px;
}

nav a {
  color: #fff;
  text-decoration: none;
  margin-right: 10px;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  color: #0b3c5d;
}

ul, ol {
  margin-left: 20px;
}

footer {
  margin-top: 40px;
  font-size: 14px;
  color: #555;
  border-top: 1px solid #ccc;
  padding-top: 10px;
}