Atom theme not working with a css snippet for some reason

[lenicyl]

I use a css snippet called CheckBoxes and the atom theme for some reason breaks it.

Code for css snippet : https://github.com/deathau/obsidian-snippets/blob/main/checkbox.css

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Here is the desired effect

And here is the same thing after using the atom theme, the ! and ? dont work under the theme

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Is there any fix ? Thank you