Can't get child theme to work

Hello,

I’m building a site using the Flat theme, and I’m trying to get a child theme to work so that when the website maintainers take over once the website is complete they can do all the updates and it won’t over write my changes

I followed the Codex page step by step on doing the CSS and yet everytime it says Broken Theme and that there is no stylesheet, can anyone help me please?

Here is the CSS:

/*
Template: flat
Theme Name: Flat
Author: YoArts
Description: Flat is a WordPress Blog Theme designed by YoArts. We would like to say th
Version: 1.4.2
License: GNU General Public License v3 or later
Text Domain: flat
Template: fFlat
Tags: black, orange, white, white, dark, light, two-columns, responsive-layout, left-si
Template: flat
This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned with others.
*/

@import url("../flat/styles.css");

.sticky {}
.bypostauthor {}

#secondary .widget-title {
    text-transform: uppercase;
    color: rgba(0, 0, 0, 0.8);
    font-family: "Roboto Condensed";
    font-size: 12px;
    line-height: 20px;
    margin: 0px 0px 10px;
}

#secondary .widget {
    font-size: 14px;
}
#secondary {
    color: rgba(255, 255, 255, 0.9);
list-style-image:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyb$
}

#secondary .hgroup{
background: #206BAE;
}

#site-navigation li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

I have also verified that the styles.css is in “/var/www/wp-content/themes/flat”

Thanks
Andrew Montgomery-Fox