body {
    font-family: Helvetica, sans-serif;
    background-image: url("fish.jpg");
}

main {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    padding: 1em 2em;
    max-width: 750px;
    margin: 0 auto;
}

h1, h2 {
    text-align: center;
}

a {
    color: black;
    text-align: center;
}

#last_updated {
    text-align: center;
}

#notfound {
    text-align: center;
}