a {
    text-decoration: none;
}

header {
    text-align: center;
    padding: 1em;
    background: #f0f0f0;
    position: sticky;
    top: 0;
    z-index: 100;
}

img {
    max-width: 100%;
    height: auto;
}

blockquote {
    margin-left: 2em;
    font-size: smaller;
}