Thank you! I’m an older programmer and can do grids using tables by muscle memory - and have always struggled to figure out the right css layout. Tools like this are super helpful.
I recently picked up some front end work for the first time in about 15 years. Things have progressed so much, CSS grid is a dream but also the things that were horribly hacky in the 2000s with JS are now solved so well.
Not even talking about frameworks or react, with just vanilla CSS, JS and the mdn docs you can build really nice sites that were so so awkward to make before.
I'd encourage you to spend a few afternoons delving deep into this, a lot of the stuff I learnt years ago is still relevant and brings a solid foundation, it didn't take long to update my approach.
new-old school is to do spacer.base64.