Why are there no controls for it in theme settings?
This question is not about where I can find the CSS section in the theme settings.\
But why is the padding control not in the theme settings? Why do you add padding from your side to the theme code and don’t add control for it? The opposite is what should be done. No padding by default, and whoever needs it should add it in the theme css.
First of all, I’m really sorry have taken long time to reply you due to the weekend.
This is default style and you need to use Custom CSS to remove it. And options should be used for global styles only, which cannot control all small details.