body {
    background-image: url("../media/cn.jpg") !important;
    background-attachment: fixed;
    background-position: center;
    background-size: cover !important;
}

header h1 {
    line-height: 40vw;
    z-index: 10;
}

main .card {
    min-height: 350px;
}

main .card p {
    min-height: 250px;
}
