This organization has the same disadvantages I've been trying to point out with the HQ style organization.

Combining everything into one giant file may be ideal for a single developer working on a project they know well but for a group project where maintainability is important we need to organize things in a more navigable structure.  Otherwise people will just write inline CSS.

Each of standalone, structure, etc. should import any variables and mixins it depends on and get compiled into its own CSS file.  That way
* When viewing a page in the browser, you can easily see which of these files a given style came from, instead of having to look through a single huge compiled CSS file, grep for classes, look at all the different less files, etc. in order to find it.
* When viewing one of these files that you've now found in your editor, you can easily see where all of the mixins and variables that it uses come from, instead of having to look up main.less and figure out which of the imports in main.less are used by the file you're editing and which aren't.
* When editing one of these files, you're *forced* to keep things modular, whereas with the existing organization someone might find it tempting to add dependencies between the sub-components, override included variables, etc.
* When changing a file, the user only has to redownload that subcomponent (all the other ones are cached), instead of having to redownload the whole site's CSS.