Can't seem to override CSS with simple.css

Hello I am trying to override the css in this theme but I can’t for the life of me make it work. Hugo Simple | Hugo Themes
GitHub - maolonglong/hugo-simple: A Hugo-theme based on Simple.css and Bear Blog

I am putting in the hugo.toml file
style = css/custom/css , i’ve tried
extraHead = ‘’

and none of it seems to work. I am really new to this stuff so if anyone has any suggestions for me please let me know.

mkdir -p layouts/partials
touch layouts/partials/custom_head.html

As a newcomer, it will probably be easiest to simply place the styles directory in the file you just created:

<style>

body {
  color: red;
}

</style>

This file is loaded last, so it will override any of the base CSS rules.

I can now see the updates on my local host but not on github though.

Please share a link to your project repository.