* {
    box-sizing: border-box;
}

body {
    background-image: url('../fondo_einstein.jpg');
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}

h1 {
    background-image: url('../titulo.jpg');
    width: 100%;
    color: white;
    text-align: center;
}

img {
    border: 15px solid grey;
    background-color: grey;
    width: 20%;
    margin: 10px auto;
}

p {
    background-color: white;
    width: 100%;
    text-align: justify;
}