I'm editing the base.css, but it doesn't affect mobile devices.

[Avvoyer]

Hi! I've been coding on the base.css, but it just simply doesn't show any difference on mobile. I don't have any idea of what's going on.

This is the code that I used:

.slider-buttons.no-js-hidden {
  display:none !important;
}

Worth to mention that this problem is not only happening on this exact code, 

[Avvoyer]

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