After my confusion yesterday about inheritance I did some reading on that and also did some experimentation.
With the Kindle Oasis I could only get the margins reduced by adding some css to the html tag,
not the body tag. I only needed -1em to get it fairly close; -2em went too far. So at the bottom of the last linked css file I had
Code:
html {
margin-left: -1em;
}
All of my Kindle books are AZW3, converted from EPUB by Calibre. Since I have the checkboxes selected as I stated above the css generated by Calibre doesn't put any margin on the p tags (i.e., sets it to 0).