The main stylesheet for Confluence contains 1325 lines and is very difficult to edit. Reducing or grouping classes and ids would make user editing of styles much easier, and many custom styles can be erased without an issue. The CSS should avoid hard-coded colours in favour of Velocity references, with only a small number of colours available (eg 15 or under) as below:

.plain-text

{ background: $action.plainBackgroundColor; color: $action.plainTextColor; }

There are too many special cases where something requiring attention gets a unique style instead of inheriting a one of a small number of attention-grabbing styles. Borders, margins and padding, are also being specified too frequently instead of cascading from a suitable parent case.

It may be possible to replace the seperate styles sets for blogs, toolbars, admin pages, and editors with a shared set.