Blueprint for site.yml Example for Tab-Layout

Kirby 3
1

Now i‘ve tried a lot to get tab-layout.
But my Blueprint doesnt work. i dont get the concept for – only section, fields and tabs, sections, fields.

where is my wrong formatting:

title:
en: Site
de: Webseite

    tabs:
    # content tab
    content:
    label: Start
    icon: 
    columns:

  # main
  left:
    width: 2/3
    sections:
      projects:
      fields:
        drafts:
          extends: sections/projects
          headline: 
            en: Drafts
            de: Entwürfe
          status: draft

        listed:
          extends: sections/projects
          status: listed
          layout: cards

  #bilder
  right:
    width: 1/3
    sections:
      notes: sections/notes
      
      pages:
        headline:
          en: Systempages
          de: Systemseiten
        type: pages
        create: default
        template:
          - team
          - home
          - default

  # Seiteneinstellungen
  preferences:
label: 
en: Preferences
de: Seiteneinstellung 
icon: 
columns:
  # main
  left: 
    width: 1/2
    sections:
      metainformationen:
      fields:
        metaauthor:
          label: Autor
          type: text
          
        metadescription:
          label: Beschreibung
          type: text
        
        metatags:
          label: Stichwörter
          type: tags
          
        copyright:
          label: Copyright
          type: textarea
          
  # files
  right:
    width: 1/2
    sections:  
      files:  
        label: Dateien wählen
        type: files
2

Looks like your indentation is completely off: https://getkirby.com/docs/guide/blueprints/tabs