How/where to tweak CSS?

[dreeves]

We needed to change the css for the <aside> tag and did this for expediency:

<aside style="background-color: #f5f5f5; border-style: solid; border-width: 1px; border-radius: 5px; padding: 25px 25px; margin: 50px 50px; float: right;">

How do we add that css permanently? I'm sure I can figure this out. Maybe by grepping for, say, "pullquote" to see where that's defined.

Then maybe update other sidebars to use the aside-tag, eg:
https://blog.beeminder.com/microcommitments

Verbata: css, sidebars,