How to add a larger spacing between paragraphs in reading mode?

I used the Minimal theme for my obsidian. I’d like to set a large spacing between paragraphs in reading mode. I tried CSS code like this:

p {
  margin-bottom: 30px; /* between paragraphs */
  }

But it doesn’t work. Does anyone know how to do it? Thank you in advance.

Have you searched the forum? I’m pretty sure this has come up before.