body{
    background-image: url(../img/fondo_einstein.jpg);
    display: flex;
    flex-wrap: wrap;
}

h1{
    size: 100%;
    width: 100%;
    background-image: url(../img/titulo.jpg);
    color: white;
    text-align: center;
    font-size: xx-large;
    margin: 10px auto;
}

img{
    margin: 10px auto;
    border: 10px solid gray;
}

p{
    background-color: whitesmoke;
}