body{
    background-image: url("https://i.blogs.es/18a70c/juego-de-los-vengadores/1366_2000.jpeg"); 
}
#contenedor-header {
    background: rgba(2, 48, 95, 0.88);
    border-radius: 25px;
    padding : 15px;
    display : flex;
}
#header-titulos{
    color: whitesmoke;
    width : 65%;
    text-align: center;
}

#header-imagen{
    width: 35%;  
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 5px;
}

li {
  background:rgba(152, 156, 255, 0.91);
  color:white;
  font-size: 20px;
  border-radius: 10px;
  padding:5px;
  margin:3px;
  font-style:italic; 
}
li:hover{
    opacity: 0.4;
}

a {
    color: white;
    text-decoration: none;
    justify-content: center;
}


article{
    display: flex;
    justify-content: center;
    margin : 15px;
    background: rgba(2, 48, 95, 0.88);
    border-radius: 15px;
    padding: 15px;
}

article div {
    width :400px;
    background: rgba(238, 238, 238, 0.89);
    padding: 20px;
    border-radius: 15px;
}

article div p {
    background: #d3eefa;
    border-radius: 20px;
    font-weight: 300;
    padding :15px;
    font-size: 20px;
    font-style: italic;
    color : rgba(59, 114, 160, 0.96);
    text-align: center;
}
article div h1 {
    font-size: xx-large; 
}
article div h3 {
    font-size: x-large; 
}
article  img {
    margin : 15px;
}
article  img:hover {
    opacity: 0.2;
}
footer{
    background : rgba(213, 253, 255, 0.9);
    border-radius: 20px;
    padding : 2px;
    display : flex;
}

.footer-p{
    color : black;
    font-weight: bolder;
    font-size: 20px;
    width : 50%;
    font-style: oblique;
    text-align: center;
}

#contenedorPrincipal{
    display:flex;
}

section {
  width: 85%;  
}

aside{ 
    width: 15%;
    border: 1px black solid;
    padding:5px;
    border-radius: 20px;
}

aside p{
    background: rgba(0, 106, 159, 0.89);
    border-radius: 15px;
    font-weight: 300;
    padding :15px;
    font-size: 15px;
    color: aliceblue;
    text-align: center;
}