* {
    font-family: monospace;
}

header, main, footer, nav {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

code pre {
    width: 100%;
    background-color: lightgray;
    overflow: scroll;
    border: solid 2px black;
    border-radius: 4px;
    padding: 4px 4px 4px 4px;
}

code {
    background-color: lightgray;
}