title: Lighthouse audit says content not sized correctly for viewport, despite body width being 100%
body: <p>I have set the body css of my html page to 100% and with no margins or padding, but it still does not pass the following <a href="https://developers.google.com/web/tools/lighthouse/audits/content-sized-correctly-for-viewport" rel="noreferrer">Google Lighthouse</a> audit "Content Sized Correctly for Viewport".</p>
  
  <blockquote>
    <p>The audit passes if window.innerWidth === window.outerWidth</p>
  </blockquote>
  
  <p>It says the viewport size is 422px whereas the window size is 412px, so this means the window is 10px wider than wanted.</p>
  
  <p>When I inspect the body element, it is showing as being 412px wide.</p>
  
  <p>I would like to pass this audit, any ideas of what is causing this?</p>