body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0 20px;
  line-height: 1.6;
  background: #fff;
  color: #222;
}
h1, h2, h3 {
  color: #003366;
}
section {
  margin-bottom: 40px;
}
.btn {
  display: inline-block;
  padding: 10px 20px;
  background: #003366;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
}
footer {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid #ccc;
  font-size: 0.9em;
  color: #555;
}