body {
    text-align: center;
    font-family: monospace;
    background-image: url(.././img/fondo.jfif);
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-color: brown;
    margin: 0;
    padding: 0;
}
a {
    font-size:25px;
    background-color:aliceblue
}

header {
    font-size: 25px;
    background-color:white
}