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

*{
    box-sizing: border-box;
}

h1{
    width: 100%;
    background-image: url(../img/titulo.jpg);
    text-align: center;
    color: white;
    font-size: 3em
}

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

p{
    background-color: white;
    opacity: 85%;
    font-size: 1em
}