I make a Django admin site using Django development version
But it does not have a CSS style :
While following the Django tutorial, I had a similar problem and in my case the issue was the mimetype used by the development server when serving css files.
The mimetype served was 'application/x-css' which led to following warning message in Chrome (in the 'Network' tab of the Developer tools):
Resource interpreted as Stylesheet but transferred with MIME type application/x-css: "http://127.0.0.1:8000/static/admin/css/base.css"
The workaround that I've found: changing the mimetype to be served by adding following lines to the django webapp's manage.py file:
import mimetypes
mimetypes.init()
mimetypes.types_map['.css'] = 'text/css'
Note: worked for me with Django 1.7.4 on Python 2.7 and Chrome 40.0