CSS as part of theme not getting linked to site

Good afternoon all,

I am literally, completely new to Drupal 8 and theme development and I have set Drupal 8.3.3 up on WAMP (Windows 10) and have created the basic files and folders to start creating my own theme how ever when putting a simple bit of CSS into one of my style-sheet files it does not get linked and hence does not render on the Drupal site.

I have the following structure:

config
css
images
js
templates
wdrc.breakpoints.yml
wdrc.info.yml
wdrc.libraries.yml
wdrc.theme

Info file:

name: WDRC
type: theme
description: 'WDRC Master site theme'
core: 8.x
libraries:
  - wdrc/global-styling
base theme: stable
regions:
  header: Header
  content: Content
  sidebar_first: 'Sidebar first'
  footer: Footer

Libraries file:

global-styling:
  version: 1.0
  css:
    theme:
      css/base.css: {}
      css/layout.css: {}
      css/components.css: {}
      css/print.css: {media: print}
	  
js-header:
  header: true
  js:
    header.js: {}

js-footer:
  js:
    footer.js: {}

base.css:

html {
	 background-color: #ffef0f; }

I have tried clearing the cache from the Performance and optimisation controls to no avail; can anyone help with this?

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/3/feed