CSS and LESS files are ignored in custom theme

Question

I'm trying to customize this component:

enter image description here

As I read from the documentation, in order to override the style of this search bar you need to create a folder called Magento_Search and add an _extend.less file in web/css/source/ but nothing happens. I can't figure out why.

• Sumit: Have you run the deployment commands?
• Matteo Paoli: if you talk about setup:static-content:deploy, yes. I've tried also with -f option since I'm in developer mode
• Sumit: Try to remove the pub/static/frontend folder and run the command again.

Answer 1

Override /vendor/magento/module-search/ module with Magento_Search module from your custom theme folder.

Answer 2

as per your screenshot can see only blank theme applies, and your theme consider as a virtual theme

so go to theme table

SELECT * FROM theme

and check type column

if your theme type column has 1 value then set it as 0

and then run

php bin/magento s:s:d -f