Footer at top. How use clear:both to fix?

the style of #footerback with position: fixed; does not get applied in the narrow browser window;

from Firefox’ web developer add-on:

/* Line 2082 */
#footerback
{
  height: 35px;
  position: fixed;
  bottom: 0px; .........

afaik, the @media queries are applied for the wide screens; you might need to move the above style into the top section (?)

btw:
it is absolutely not recommended to edit the default theme Twenty Twelve directly, but to create a child theme for the customization; https://codex.www.ads-software.com/Child_Themes

alchymyth, thanks for the help. The location of the footer css was duplicated, and reading the wrong one, which did not have the fixed setting. So thanks for making me doublecheck.

Understood completely on the child theme. Was in a rush to create proof of concept for client, so duped the theme and went at it with the stylesheet. Ultimately, it will be a true child.

Thanks again.