Light-boxing is a technique for cleanly popping up information in a web-page while simultaneously darkening the main page to provide focus to the popup content. All of the major javascript libraries provide very nice light-box implementations, but they come at the cost of large memory footprints that may not work in an embedded application where memory resources are constrained. In this tutorial, we present a simple, yet elegant light-box implementation using CSS and minimal JavaScript: http://OFFLINEZIP.wpsho/tutorials/simple-small-fast-css-lightboxing-for-embedded-web-servers/