body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f6f9fc;
  color: #333;
}
.header {
  background-color: #004d99;
  color: white;
  padding: 2rem;
  text-align: center;
}
.header h1 {
  margin: 0;
  font-size: 2rem;
}
nav a {
  margin: 0 10px;
  color: white;
  text-decoration: underline;
}
.contenido {
  padding: 2rem;
}
h2 {
  color: #004d99;
}
ul {
  margin-top: 0;
}
.final {
  margin-top: 2rem;
  font-weight: bold;
}
.footer {
  background-color: #eaeaea;
  padding: 1rem;
  text-align: center;
  font-size: 0.9rem;
}