I want to make some modifications to the bartik theme i am using D8 (like changing the logo position,etc) i created a subtheme named it "mytheme" following the instruction i found here:


So, first I created the mytheme.info.yml file containing:

name: mytheme
type: theme
base theme: bartik
description: subtheme for bartik
core: 8.x
  header: Header
  primary_menu: 'Primary menu'
  secondary_menu: 'Secondary menu'
  page_top: 'Page top'
  page_bottom: 'Page bottom'
  highlighted: Highlighted
  featured_top: 'Featured top'
  breadcrumb: Breadcrumb
  content: Content
  sidebar_first: 'Sidebar first'
  sidebar_second: 'Sidebar second'
  featured_bottom_first: 'Featured bottom first'
  featured_bottom_second: 'Featured bottom second'
  featured_bottom_third: 'Featured bottom third'
  footer_first: 'Footer first'
  footer_second: 'Footer second'
  footer_third: 'Footer third'
  footer_fourth: 'Footer fourth'
  footer_fifth: 'Footer fifth'

Next i created the mytheme.libraries.yml containing the following:

      css/style.css: {}

i went to appearance and enabled "mytheme" as default, went back to site, looks identical to how bartik was so far so good

my problem now is, how do i move on with the customizations i want to do?

i created a folder called: "css" in "mytheme" directory, inside the css folder i created a blank file called "style.css" and there i wrote the first modification i want to do

.region-header .site-branding {
    float: none;
    text-align: center;

When i go back to site i see no difference, the logo remains on the left like it was on bartik

Can somebody help please?

I am not sure how to proceed and if what I did by creating a css folder, etc is the right way.

Thank you.

  • Just to be sure: did you change to your new theme in admin/appearance and did you clear cache? Jan 24, 2017 at 8:35
  • yes, i did set as default the new theme and i cleared the cache
    – kyriakib
    Jan 24, 2017 at 10:08

1 Answer 1


Not sure if this is still relevant or not but I was having the same issue and I was just missing a dash.



- mytheme/global-styling

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