Where is this inline CSS code [closed]

Where is this CSS code?

I mean the margin-top: 46px !important!;
I need to change it to 1px to rid of top margin. But i didn’t found it in any theme’s files.

Note: I have searched the texts in all files using FileSeek Pro. But didn’t found anything. (even with Inspect Element in the Firefox)

The CSS code you’re seeing is added by core of WP when admin bar is showing.

The function that outputs it is called _admin_bar_bump_cb() and it’s called as hook on wp_head.

So how to get rid of it? Just remove this action from that hook:

function remove_admin_bar_bump() {
   remove_action( 'wp_head', '_admin_bar_bump_cb' );
}
add_action('get_header', 'remove_admin_bar_bump');

Then you can add it in your CSS and use body.admin-bar as context if you want to add some styles only if the admin bar is visible.