Dumb move of the day - footer no longer displays

In a moment of stupidity I added this script 

<style>

    header, footer {

        display:none;

}

</style>

to a page footer rather than in "settings>advanced>code injection>footer".  My footer no longer displays on any of my pages and of course I can't change it because it no longer displays. How do I extricate myself? Thanks in advance.

You ever make the same dumb move immediately after reading about how someone did the same dumb move? In the exact same way?

I just did what this guy did, word for word:

To boot, I have no idea what the original code was exactly (I didn't copy it anywhere before pulling it off one of whichever tutorials), and the anti-idiot code that @creedon suggested isn't doing it when I put it into the Settings>Code 

Anti-idiot code I have in Code Injection:

<style>

/* Footer */

Footer.sections {display:unset !important;}

</style>

I'm ready to throw the whole thing away. Can anyone help me before I have to go back to the client and embarrass myself in public?

5 hours ago, RoseMraz said:

You ever make the same dumb move immediately after reading about how someone did the same dumb move?

Please see the following.

Let us know how it goes.