some structure

Your project is pretty interesting, make a timeline yourself ...on my list too but for to long.

But the structure keeps me from touching it. If you seperate e.g. the css from html ...someone comes up with fancy css, you can add via config. Or someone would like to think about: how to combine / add pictures to this timeline ;)

What are your plans?

No files or tests are named in the issue. Start by reviewing the current HTML and CSS structure, then determine the intended separation and configuration approach for alternate styling or adding images. Done would require an agreed scope and a documented implementation plan.

Written by the indexing model from the issue text.