body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #f8f8f8;
  color: #333;
}
header {
  background: linear-gradient(to right, #003366, #005599);
  color: white;
  padding: 20px;
  text-align: center;
}
nav a {
  color: white;
  margin: 0 10px;
  text-decoration: underline;
}
main {
  padding: 20px;
  max-width: 900px;
  margin: auto;
}
footer {
  background: #003366;
  color: white;
  text-align: center;
  padding: 10px;
  font-size: 0.9em;
}
h2 {
  color: #005599;
}
ul li {
  margin-bottom: 10px;
}
a {
  color: #005599;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}