Keyboard and reading
Use Tab to move between controls and Enter or Space to activate buttons. On this page navigation jumps to lesson sections. Choose Simple, Technical or Practitioner explanations; your preference stays in this browser.
Motion and labs
System reduced-motion settings are respected. Labs offer manual steps and a text transcript. Focus on lab removes surrounding navigation; Escape exits that mode. Component explanations can be pinned or closed.
Progress
Learning progress is local and needs no account. When storage is unavailable, lessons remain readable. You can clear learning data from My learning.
Feedback and limitations
We test keyboard controls and responsive layouts and aim to meet WCAG 2.2 AA. This is not a claim of independent accessibility certification. If a control prevents you from learning, contact us with the page, browser and description of the problem. Please omit personal or incident information.