body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 10px;
}

footer {
    border-top: 1px solid lightslategray;
    padding: 20px;
    margin: 10px;
}

article {
    border-top: 5px double darkslategray;
    margin: 30px 0;
}

article img {
    width: 90vw;
    max-width: 1160px;
    height: auto;
}