body {
    background-image: url('https://images.unsplash.com/photo-1517694712202-14dd9538aa97?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D'); /* Subtle tech background */
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* Makes background fixed when scrolling */
}