@akacruiseman
Raindrops has simple minified css js loader.
You need to prepare the minified file yourself.
For example child theme.
https://www.tenman.info/download/raindrops-min.zip
Note:
Since the Raindrops theme updates frequently
If you do not automate, it will take time and effort.
When you create style-min.css for your parent theme, the style of the parent theme reads style-min.css.
Once the theme has been updated, style – min.css will be deleted.
If you add PHP code to functions.php and you do not have style-min.css, you might want to write a script that copies each CSS and saves each minified.css.