plug in “Custom Dashboard Page” and adding CSS

Hi,

For the plug in “Custom Dashboard Page” can you add custom CSS to your newly customised dashboard page.

This plug in allows you to create a PAGE (WORDPRESS DASHBOARD > PAGES > ADD NEW) which I have used HTML for this and called this page “Dashboard”. Each element/selector has a reference of an ID or Class so that I can refer to this with my CSS. Then via the plug in “Custom Dashboard Page” I have selected the page called “Dashboard” as my custom dashboard.

The HTML shows fine now on my custom dashboard. What is not showing is any CSS. Where do I add CSS to apply to this new custom dashboard page.

I have tried in:
1. The page settings to add CSS;
2. WORDPRESS DASHBOARD > THEME CUSTOMISER > ADDITIONAL CSS
3. style.css of my child theme

Neither recognises the CSS for the dashboard. Hence I assume there is plug in limitations or this needs to be placed elsewhere. Please advise on how to proceed?

Thanks Clare

The page I need help with: [log in to see the link]