Where's the source code for planetmath.org's home page and the indices?

[Artoria2e5]

I am really interested in knowing these so I can start fixing the website, and it's just not in this organization. Some issues I have with it are:

• The top-level subject category links in the indices just don't work. The reason it's not working is because the program generating the index is putting a # in the id field.
• The index is hard to scan. It can be improved a lot by using a bit of unordered list (ul li) and column view (column-width: 20em;).
• The pages are just too wide to read on a maximized window. A @media(screen) { body { max-width: 60em; margin: 0 auto; }} rule will constrain the width to a reasonable amount.
• The pages are a bit dull with only sans-serif fonts. A h1, h2, h3, h4, h5, h6 { font-family: serif; } rule will make headings serif, and give it a bit more variety.

I am more than happy to work on the static pages of PlanetMath and the scripts used to generate the dynamic pages (so I can add CSS styling, for example). I guess this repo is the place for any such code to be?