body {
    background-image: url("../bk/space.jpg");
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

section {
    background-color: rgba(85, 77, 81, 0.2);
    width: 95%;
    margin: 5rem auto;
    padding: 2rem;
    border-radius: 3rem;
}