I changed the field border color using a CSS file in the public folder. Is this correct?

Frappe Framework
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1

healthcare/public/css/border_color.css

2

Putting CSS in app_name/public/css is standard, but it must be referenced in hooks.py using app_include_css (Desk) or web_include_css (Website/Portal).

3

Thanks for a response , I need to know which is better for styling is CSS or SCSS ?

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SCSS As per my practice.