Tweak Neo Dark with custom CSS

[LGFox]

Problem

Every time I apply a custom CSS, it uses the light theme as a base theme. I want to use the default Neo Dark theme and apply my custom CSS tweaks there.

Solution

Create a publicly available note with Neo Dark theme, so that I could include it to my notes, and apply additional custom CSS tweaks.

Alternative solution

Don't always use light theme as default theme for custom CSS. Just apply the custom CSS to whatever is chosen by the user by default.