How to change default font in <li> tag, or have it leave my body text

When I click the button for bullets or numbers, it puts the tag in my system correctly, but goes back to some Times Roman font with a smaller size than the body font I specified in content.css. Adding a definition in content.css, like I standardly use on my web pages to adjsut formatting fo the <li> tag does not work. I want to be able to set margins, font, size, etc.  I see that in THIS instance that I am using to enter this text, when I click the bullet  or number, the font stays the same as the rest of the body, lookiing like the normal. How is that done? I want my font not to change, and I also want to set margins for indent and paragrahp spacing above and below, as well as line-height, or to have it inherit the line-height and font from my body.  Anybody konw how to do that?