Child Theme style.css does not work

I am beating my head into the wall of non working code! I have created a custom theme using a plugin, copying code from your site, downloading and moving the files into the correct folder, and manually. But every time I try the style.css does not “trump” the parent theme css. If I put the code in the editors custom css then it will work – but it will not work with a child theme!

I will give a simple example. here is what my child theme css looks like, all I am trying to do is hide the header:

Theme Name: Catch Responsive Child Theme
Theme URI: http://catchthemes.com/themes/catch-responsive
Author: Catch Themes Team
Author URI: http://catchthemes.com
Description: Catch Responsive is an extremely flexible and customizable WordPress theme suitable for almost any kind of professional website. It is based on responsive design where each element has been carefully configured for perfect display on all devices and platforms. It is built in HTML5, CSS3 and WordPress Theme Customizer for real time customization. It comes with a wide variety of options so you can modify layout, styling, featured content, promotion headline, featured slider, pagination, icons, menus, breadcrumb, widgets and much more, directly from theme customizer. This theme is translation ready and also currently translated in Swedish. Check out Theme Instructions at http://catchthemes.com/theme-instructions/catch-responsive/, Support at http://catchthemes.com/support/ and Demo at http://catchthemes.com/demo/catch-responsive/
Version: 1.0
License: GNU General Public License, version 3 (GPLv3)
License URI: http://www.gnu.org/licenses/gpl-3.0.txt
Tags: black, gray, silver, white, dark, light, one-column, two-columns, left-sidebar, right-sidebar, fixed-layout, fluid-layout, responsive-layout, custom-background, custom-colors, custom-header, custom-menu, editor-style, featured-image-header, featured-images, flexible-header, front-page-post-form, post-formats, sticky-post, theme-options, threaded-comments, translation-ready
Text Domain: catchresponsive
Template: catch-responsive

header {
display: none;
}

This will not work no matter what I try! I plan on doing a lot of custom css so I do not want to add it all via the theme editor. Any advice on why this is not working? Site is http://www.thecaseisclosed.com.