body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #f5f5f5;
  color: #333333;
  margin: 0;
  padding: 0;
}

#contenedor {
  width: 800px;
  margin: auto;
  background-color: #ffffff;
  border: 1px solid #cccccc;
}

#header {
  background-color: #eeeeee;
  padding: 15px;
  text-align: center;
}

#menu {
  background-color: #fafafa;
  padding: 10px;
  text-align: center;
}

#menu a {
  color: #0055aa;
  text-decoration: none;
  margin: 0 6px;
}

#menu a:hover {
  text-decoration: underline;
}

.contenido {
  padding: 20px;
}

h2 {
  color: #0055aa;
}

blockquote {
  background-color: #f9f9f9;
  border-left: 4px solid #0055aa;
  padding: 10px;
  font-style: italic;
}

#footer {
  background-color: #eeeeee;
  text-align: center;
  padding: 10px;
  font-size: 12px;
}