I’ve been doing a lot more HTML/CSS recently than backend stuff, which suits me actually. Anyway, this is for Socialtext Open, the Wiki platform for which I’ve been doing a fair bit of work recently. It’s quite an extensive and varied app, so dealing with the CSS is quite an interesting challenge. The HTML is fixed (without getting your hands dirty – it’s OSS so you can dive in and do what you like) although it’s possible to set up a custom javascript insert in the config through which the DOM can be manipulated to suit. In this example, it’s used to add an automated onion-skinning technique for the sidebar boxes and some other tricks (font-size toolbar, etc.)