body {
    background-image: url("./img/fondoprosman4.png");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
}




.powerby {
    filter: drop-shadow(3px 3px 6px rgba(0, 0, 0, 0.8)) drop-shadow(-3px -3px 6px rgba(0, 0, 0, 0.8));
}