body {
    background-color: #b6bcab;
    background-image: url("background.gif");
    background-size: cover;
    background-attachment: fixed;
    text-align: center;
    max-width: 800px;
    margin: auto;
    font-family: sans-serif;
}
a, a:hover, a:visited {
    color: #235b3a;
}
div.card {
    background-color: #fff;
    border-radius: 30px;
    box-shadow: 0px 0px 20px #000;
    padding: 10px 30px 10px 30px;
    margin: 30px;
    opacity: 0.85;
}