Cascading Style Sheets made it easier to make pretty and usable webpages by separating out how a page looked from how a page was put together in HTML. More importantly, CSS made it easier to learn how to make pretty and usable webpages: you could use a browser to inspect a site’s code and start messing around with the whole page, changing everything with just a little tweak. (Shout-out to Microsoft for supporting CSS early. Then shout at Microsoft for ruining the lives of web coders everywhere with its weird box model and other broken CSS implementations.) Having to code to specific browsers is still a thing, but at least it’s not as bad as it once was. Go ahead and change a font on your favorite webpage today, just because you can.