“The changes in the theme.css file didn’t work for some reason (I tried it before as well)”
It was probably your Browser Cache. Anytime you make CSS adjustments you’ll need to clear your Cache if you want the changes to show up Instantly on your end. A quick way to do it is to simply hit your Reload Button on your Browser. That’s how I always do it.
“How do you get rid of the extra white space between the article summaries in content archives like the Blog”
Looks like you already figured this one out too. Most of the space is coming from the Entries section (around line 1780) –
.entry {
margin-bottom: 40px;
padding: 0;
}
It’s originally 100px, but you set it to 40px. Remember to hit your Reload Button if you want to see the CSS changes show up instantly on your browser. I can already see the changes you’ve made on your site.
“I’ve noticed a gap between the end of the article and author’s box – anyway to make it narrower?”
The code you edited above handles that as well. The entry code is the same for Blog Posts, and Single Posts. You can separate them to be different if you want, but for now it’s showing up as you have it edited.
Let me know if this helps.