Aligning

First resolve your syntax error; you’re not closing your print media query.

Your CSS is not working because of the errors I mentioned above – when you have CSS errors it invalidates all the CSS after that.

You also should NOT have a copy of the entire parent theme stylesheet in the child theme – so start by putting only this at the top of that file:

/*
Theme Name: Twentyten-childcmp
Theme URI: https://www.ads-software.com/extend/themes/twentyten
Description: Child theme for Twenty Ten theme
Author: Marie Dorey
Template:       twentyten
License: GNU General Public License v2 or later
*/

@import url("../twentyten/style.css");

Then after that line, put ONLY your changes. Then we can start figuring out what’s going on.

Save a copy of your current child theme style.css file to your computer before you do the above.

This is a major error here – line 92:

#footer {
 height: 240px;
 background-image: url(https://www.canadianmacedonianplace.com/wp-content/uploads/2013/08/cmpfooter.png);background-repeat:no-repeat;
}
}
	clear: both;
	width: 100%;
}

/*
LAYOUT: One column, no sidebar

THANK YOU, THANK YOU….
I will try this…. slowly.

OMG!
Thank you both so very much.
What an incredible lesson I have just learned regarding modifying child themes.
WOW!