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Understanding css and stylesheets

I don’t understand what a stylesheet is. I’ve been looking at some dashboards in the dash app gallery, and don’t see a stylesheet listed the same way in the app=dash.Dash(…) line the way it is done in the tutorials.

If I wanted to copy a style for a dashboard online, is there someway I can download their stylesheet?

For example:


Hi @ilemi, explains how to use css in your Dash app (if you’re completely new to CSS, you might want to read The source code of the app you linked to is on (I think, not 100% sure), the stylesheet is