#contenedor-header {
    background-color: dodgerblue;
    color: black;
    border-radius: 20px;
    padding : 15px;
    display : flex;
    border: 5px blue solid;
    margin : 15px;
}

ul {
  display: flex;
  justify-content: center;
  list-style: none;
  margin : 15px;
}

li {
  background-color: honeydew;
  color: black;
  font-size: 20px;
  border-radius: 20px;
  padding:15px;
  margin:3px;
}

a {
    color : black;
    text-decoration: none;
    padding: 15px;
}

article {
    justify-content: center;
    margin : 15px;
    font-size: 20px;
    background: cadetblue;
    border: 5px blue solid;
    border-radius: 20px;
    padding:15px;
}

body{
    background-color: lightblue;
}