Hi there,
Thank you for reaching out, and I apologize for any inconvenience caused by this oversight. If you want to change anything on the template.css file or if you want to create a custom.css file inside the css directory then it's possible. Let's see what the process is.
If you want to change the template.css file code then you need to disable scss compile from the template settings or you need to change the code from the theme.scss file of scss directory.
or You can create a custom.scss file inside the scss directory & write your scss code inside the custom.scss file.
or Just create a custom.css file inside the CSS directory & write your css code.
I appreciate your cooperation and will be sure to get back to you as soon as possible.
Best regards,
Toufiqur Rahman (Team Lead, Support)