body {
    background-image: linear-gradient(rgba(255,255,255,0.8), rgba(255,255,255,0.8)), 
                      url('https://images.unsplash.com/photo-1560518883-ce09059eeffa?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}