title: Slow down CSS transitions/animations into "slow motion"
body: <p>On a Mac, if you hold the <kbd>Shift</kbd> key and perform an action that involves animation, it will slow down the animation. For example, hold <kbd>Shift</kbd> and minimise a window. This effect is described in various places (e.g. <a href="https://www.youtube.com/watch?v=QVPfHp6ixlQ" rel="nofollow noreferrer">YouTube</a>, <a href="https://apple.stackexchange.com/questions/108391/whats-the-benfit-of-using-shift-for-slow-animation-when-subing-windows">Apple - StackExchange</a>, <a href="http://www.tuaw.com/2010/12/08/mac-101-the-wonderful-magical-shift-key/" rel="nofollow noreferrer">The Unofficial Apple Weblog</a>).</p>
  
  <p>It would be nice to slow down CSS animations/transitions in a similar way. Is there a way to achieve this (apart from simply tweaking the animation-duration value in the CSS)?</p>