.main-background {
    /*background-image: url("../images/molinos/fondo.png");*/
    grid-row: 1 / span 2;
    grid-column: 1;
    width: 100%;
    height: 100%;
    z-index: -100;
    background-attachment: fixed;
}

nav {
    background: #F6F8FA;
    padding: 5px;
    width: 100%;
    margin: auto;
    text-align: center;
}

.nav-logo {
    width: 150px;
    margin: auto;
}