title: How to ignore/overwrite existing css class
body: <p>I use a tool that changes the original CSS code on a website.</p>
  
  <p>I want to show a hidden text and have to overwrite the original class but have no idea how in this case. It's like a adblock protection.</p>
  
  <p>The CSS class is:</p>
  
  <pre><code>.text-invisible{
      filter:url(#hidden-text)
  }
  </code></pre>
  
  <p>I would be very happy about your help</p>