Static files return 404 in production when DEBUG=False

CSS, JavaScript, and images return 404 errors in production when DEBUG=False. Django doesn't serve static files in production mode. Issue is either STATIC_ROOT not configured or collectstatic command not run to gather static files.

Set `STATIC_ROOT = '/var/www/static/'` in settings. Run `python manage.py collectstatic` to copy all static files to STATIC_ROOT. Configure web server (nginx/Apache) to serve STATIC_ROOT directly, bypassing Django. Verify web server static file configuration.