Huge progress – just need to change font on all posts

I've made such progress. I've got my menu looking great and my featured content looks fab too. I just can't seem to change the font and size to look the same on all posts. I migrated my blogger posts and if you scroll down you'll see the text is smooshed together and left aligned. I edited some posts individually (the later posts) but would like to just have one format that would overwrite the rest. How does that work? It also seems that the code I added for the title affects the post and vice versa. What is the custom CSS for title in it's own font, left aligned. What is the custom CSS for post content in it's own font, center aligned. I'm so close. Any help would be awesome. http://interiorsalvagedesign.com/ Thanks!