Override Admin Styles

admin-styles.php

// customize admin bar css
function override_admin_bar_css() {
   if ( is_admin_bar_showing() ) {
      /* Could add a custom enqueue here instead of a style tag */
      /* Example 👇 */
      $version = time();
      wp_enqueue_style( 'ip_master-style', get_stylesheet_directory_uri() . '/dist/css/style.css', array(), $version );
      ?>
      <style type="text/css">
         /* Add Styles Here */
         #wpadminbar > #wp-toolbar > #wp-admin-bar-top-secondary > #wp-admin-bar-search #adminbarsearch input.adminbar-input {
                min-width:auto;
         }
      </style>
   <?php }
}

// on backend area
add_action( 'admin_head', 'override_admin_bar_css' );

// on frontend area
add_action( 'wp_head', 'override_admin_bar_css' );