Text Splitting Between Lines In Posts

Hello,
I am brand new to using WordPress. I am excited by the potential it has to create and customize web content. I have just begun, with an initial post on my new domain, and while it looked fine at home on my MacBook, checking it out on a PC, at work, I noticed it split and hyphenated words, and even a web address (which it didn’t automatically make a link, as I thought I just read it should), having them carry onto the next line.

I did a quick search and found previous forum posts, but after applying the changes to the CSS code, nothing seemed to change. This includes using this bit of code:

html .site-content article {
word-wrap: normal;
-webkit-hyphens: none;
-moz-hyphens: none;
hyphens: none;
}

and also, I used the Find feature in the browser for any use of “break”, changing them to normal, but still, the appearance remains the same. Also, on a slightly related note, is it possible to put a line break within a post’s title? I am currently using the Twenty Fifteen theme, by default, though I may end up changing that. Thanks, in advance, for any assistance you can provide!

-Zach