Hi,
The order of the CSS files can be changed in the templates/YOUR_TEMPLATE/index.php file (or in some other file of your template based on how it is developed).
However, usually, you don't want to change that because you're loose your change after each update of the template.
Ideally, rather than doing that, you want to write your CSS code in a way which makes your CSS with a higher priority. For example, a way to do that is to use !important in your CSS:
developer.mozilla.org/en-US/docs/Web/CSS...nce/Values/important