changing colour logo to black on "work" page

Site URL: https://cnocspot.squarespace.com

Hello,

I have a similar issue.

I'd love the logo to invert on light background pages such as the page "work" and some on my Portfolio project pages.
example this one: 
https://cnocspot.squarespace.com/config/pages/632c4be5968ba044b82a08f0

and this one:

https://cnocspot.squarespace.com/work

Do I paste a specific CSS code per page?

Many thanks in advanc for any advice!
Lisbeth Antoine

Add this to Page Header (DO NOT ADD TO DESIGN > CUSTOM CSS)

<style>
body:not(.header--menu-open) header#header img {
    filter: invert(1);
}
</style>