A repository for CSS layouts/templates I have come across, for easy reproduction.
The dummy page found in the folder "three-line-layouts" contains three separate sections, each with separately-styled grid-containers. The last one involves entry transition animations. see basic-style.css for common styles to all (card, etc), and three-line-styles.css for specific ones.
note, the last layout and intro animation is a bit more complicated than 3 lines, but it's neat!
done to the tutorial video found at: https://www.youtube.com/watch?v=705XCEruZFs