Double line spacing not enabled!

[ Moderator note: moved to Fixing WordPress. ]

Hello,

3 Part question here 🙂

1.) I was wondering if there is a way to enable double spacing of a theme via custom css, or does the css need to be done inside the themes styles?

My website is somehow locked to the shift+enter spacing, i.e. double spacing is not enabled by default. This is driving me absolutely nuts because I’m creating a forum site and users expect that what they see in the visual editor will translate into what is live when they press enter, but instead all paragraphs turn into single returns. The only “fix” I’ve found is to inform all users to click enter twice to make correctly formatted paragraphs 🙁

2.) what would the code be? I’ve tried this:

.post p {
line-height: 1.5em;
padding-bottom: 15px;
}

3.) If the code cannot be done via custom css. Then since my theme’s styles does not have this field, where do i place the code?

Thank you in advance!!!!
http://www.test.salamatphilippines.com