Need help resing up pixel images to maintain hard edges

Hey guys I am trying to rebuild my pixel portfolio site in Webflow and I want to embed this style

image {
image-rendering: pixelated;

I need it on every page of the site and have watched all the videos and cannot get this custom code to work.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

It’s just CSS, so you can put it in your site-wide HEAD custom code.
If you want to see it in the designer at design time, drop it in an HTML Embed, and place it in your nav or footer component, whatever you have on all of your pages.

About the code itself;

img {
  image-rendering: pixelated;