Gentoo Wiki: How to add CSS to Table Of Content?

[midnite]

Is it possible to add CSS styling to the Table Of Content (i.e. __TOC__)?

https://www.mediawiki.org/wiki/Template:TOC

For example, how to align it to the right? I would like to add position: sticky; top: 0; to it. I tried adding <style>.toc{ position: -webkit-sticky; position: sticky; top: 0; }</style> but it end up showing in plain text in the content.
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- midnite.