My first attempts with css grid

hey guys
Just wanted to share this because this feels like a big step forward for me. Just put together some CSS grid layouts and posted them to codepen. I would love to get some feedback from you guys on these.

you can find them here:

Hi Matt,
I think these are great. Grid layout is tricky, but once you get used to it you can do all kinds of cool stuff.

Next Steps:

.box-7 {