iframe {
    width: 92vw;
}

body {
    margin: 2vw;
    margin-top: 0;
    padding-bottom: 150px;
    max-width: 600px;
    font-family: Verdana, Helvetica, sans-serif;
}

img {
    width: 400px;
    max-width: 92vw;
}

summary {
    cursor: pointer;
}

details {
    border: 1px solid black;
    padding: 1em;
}