Your file structure is important for maintaining a clean working system.
How the w3c standard always say that a website structure should be in 3 parts.

  • Information (XML)
  • Layout (HTML)
  • Design (CSS)

For me it is important to keep this information seperate, though XML is a bit more complicated we focus more on keeping design and information away from each other.

My website file structure…

Folders:
images
javascript
css
scripts / codebase
includes

All styles are included within the css stylesheet and code if possible is kept seperate. This is important to maintain code and help reduce repeating code.