Style the feature section

- [Narrator] If you take a literal approach…to Bootstrap rows, the feature section…should really be three separate rows,…because the columns for this heading…and for this image of Tunnel View are always too wide…for any other content to be alongside them.…However, using a row for these vertically stacked columns…makes it easy to style them as a single unit.…They've already been centered by using the…justify-content-center Flex utility class.…So let's quickly add a few more styles.…

So I'm going to switch to the CSS Designer,…and I know I'm going to need some extra space,…but before doing that, I'm going to drag the…Assets panel out, so that I can see it.…And the reason I'm doing that…is because in the images folder…is this file, colors.png, that's got some swatches…of the colors I'm going to use,…and if necessary you can resize this pane at the top.…So I can now collapse those columns,…and in the CSS Designer in the Sources pane,…make sure that the stylesheet…for custom styles, yosemite.css, is selected.…

Then in the @Media pane, we need to select Global…