The project consists of roughly 40,000 lines of HTML radio buttons and labels, combined with fewer than 500 lines of CSS where the real work is done.

If you’ve been thinking of building beautiful websites, all you need is a bit of HTML and CSS. And, of course, the right instructions to guide you along the way. Here are some YouTube channels ...

Code commonly flows downstream, from an open-source project into an organization’s own products. Upstreaming is the process of reversing that flow—contributing code back to an open-source project.