treehouse/static/css/doc.css

main.doc {
    --doc-text-width: 80ch;

    display: flex;
    flex-direction: row;
    align-items: start;

    & .vertical-center {
        min-height: 100vh;
        flex-grow: 1;

        display: flex;
        flex-direction: column;

        align-items: center;
        justify-content: center;
    }

    & .doc-text {
        padding: 1.6rem;
        max-width: var(--doc-text-width);

        line-height: 1.6;

        /* I was thinking a bunch about whether documents should be justified, and it honestly
           causes more awkwardness than it solves. Web pages aren't quite books, unfortunately.

           A cool feature that would help is text-wrap: pretty; but only Safari implements a nice
           text layout algorithm for it. (Chrome prevents short last lines, Firefox doesn't
           implement it at all) */

        /* text-align: justify;
           hyphens: auto; */

        & p {
            padding-top: 0.5lh;
            padding-bottom: 0.5lh;
        }

        & h2 {
            margin: 0;
            padding-top: 1lh;
            padding-bottom: 0.5lh;
        }

        & ul,
        & ol {
            /* Is there a better way to add spacing to the marker, other than adding whitespace? */
            list-style: "-  ";
            margin-top: 0;
            margin-bottom: 0;
            padding-bottom: 0.5lh;
            padding-left: 3.2em;
        }
    }

    & section.feed {
        max-width: 40ch;
        padding: 0.8rem;
        padding-top: 3.2rem;
    }
}

@media (max-width: 1500px) {
    main.doc {
        flex-direction: column;
        align-items: center;

        & .vertical-center {
            min-height: 0;
        }

        & footer {
            padding: 0.8rem;
        }

        & section.feed {
            max-width: var(--doc-text-width);

            margin-top: 2.4em;
            padding: 1.6rem;
            border-top: 1px solid var(--border-1);
        }
    }
}