title: W3C CSS Validator - Parse error
body: <p>I know that there are many posts like that, but i realy can't find an answer that solves my problem.</p>
  
  <p>I really want to get my CSS 3.0 validated and I don't know how to do it especially with those parse error on the begining. I have checked for any invisible characters but didn't find any.  </p>
  
  <p>So my problem is what can be the reason for those parse error?</p>
  
  <p>Also I do understand that if i want to provide the compatibility for browsers i can't get rid of this error:<br>
  <code>Sorry, the at-rule @-moz-keyframes is not implemented.</code></p>
  
  <p>Here is the link to <a href="http://jigsaw.w3.org/css-validator/validator?uri=kamil.stempka.pl%2Fcss%2Fmain.css&amp;profile=css3&amp;usermedium=all&amp;warning=1&amp;vextwarning=&amp;lang=en" rel="nofollow">validator</a> results and my <a href="http://kamil.stempka.pl/css/animations.css" rel="nofollow">css</a></p>
  
  <p>EDIT: Thank you all for your answers regarding the "at-rule" but it was almost retoric question on which I had found the answer earlier, but wanted to be sure if anything has changed. Also the thing that rest of the vendor extensions are only warnings and those 6 (now 2) are errors.</p>
  
  <p>But the main question was about the parse error which I don't know how to remove and why it is there.</p>
  
  <p>EDIT SOLUTION:</p>
  
  <p><em>Yours answers and little bit of testing led me to the final answer:</em><br>
   - The vendor extensions are only warnings, but not in case of keyframes (i think that this feature is to new).<br>
   - The parse error was only because of the above conclusion (keyframes extension).<br>
   - I have also used for the @-webkit-keyframes the solution given by Kami and placed all animations in separate vendor.css which i have linked to the html with help of the javaScript.</p>
  
  <p>Now everything is validating as it should be.</p>