Looking to have the footer stay at the bottom of the browser window in your Bricks site?
Simply add this CSS:
.brx-body {
min-height: 100dvh;
}
There are several places in which custom CSS can be added in Bricks.
Since you would want this to be site-wide, one good place to put in is Bricks → Settings → Custom code under Custom CSS.
Before:

After:
