Step 6 - Verify Your Store's CSS
This step must be performed manually after installation to verify that the extension is working correctly and to correct any troubleshooting errors.
Browse your store to verify that the styling hasn't changed.
One common issue is the use of @import directives in the original CSS files. During the minification process, the @import linked files end up being loaded first. If this is causing issues, remove the @import directives and instead load the files via an explicit layout xml instruction.