Modular Custom CSS

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WordPress core provides custom CSS functionality in the customizer that’s specific to the current theme; you can switch themes freely with each theme’s additional CSS remaining in place. Sometimes, you need some CSS to apply regardless of the current theme persistently. This plugin adds a plugin CSS option for CSS that’s global and persists across theme changes. With the Customizer, your CSS is instantly live-previewed, offering the ability to see exactly how your site will look before you publish your changes. This plugin is extremely simple; no validation is performed on the CSS added here and revision history is not saved (although it will be if/when Customizer setting revisions are added to core). The plugin CSS option is stored as an option. Prior to WordPress 4.7 (which introduced additional CSS in core), theme-specific CSS was stored as a theme_mod, in 4.7 and newer this is migrated to the core CSS functionality (which is theme-specific).