Theme with variable width inside settings

[Heddson]

In the CSS you can use something like this
#{$header_width} .

Check this topic:

How to add settings to your Discourse theme

Discourse now has the ability for themes to have “settings” that can be added by theme developers to allow site owners to customize themes through UI without having to change any line of code and worry about losing their changes with future updates for the theme. Table of Content Adding settings to your theme Supported types Setting description and localization Min and max attributes Access to settings in your JS/CSS/Handlebars 1) Adding settings to your theme Adding settings to your theme i…