Alright, first things first, make sure you've got two versions of your logo ready to go: one for when the page loads (default logo) and one for when you scroll down (scrolled logo). And hey, don't forget to optimize those images for the web. It'll make your site load faster, which is always a good thing.

• Open up Webflow Designer and head over to the Asset panel.
• Click that upload button and get both your default and scrolled logos in there.

• Drag a "Navbar" component from the Add panel onto your canvas.
• Inside the Navbar, add an "Image" element.
• Choose the default logo from the Asset manager for this Image element.
• Give this image an ID, something like "default-logo".

Now, do the same thing to add another Image element for the scrolled logo. Give it an ID like "scrolled-logo" and set its initial visibility to "hidden" in the Style tab.

• In Webflow Designer, go to the Page Settings of the page where you want this cool responsive logo behavior.
• Scroll down to the "Before tag" section.
• Pop in the following JavaScript code to handle the scroll event and toggle between the logos:

<script>
  document.addEventListener('scroll', function() {
    var defaultLogo = document.getElementById('default-logo');
    var scrolledLogo = document.getElementById('scrolled-logo');
    
    if (window.scrollY > 50) {
      defaultLogo.style.display = 'none';
      scrolledLogo.style.display = 'block';
    } else {
      defaultLogo.style.display = 'block';
      scrolledLogo.style.display = 'none';
    }
  });
</script>

Make any extra style tweaks you need to match your design. Then, publish your site and watch your responsive logo magic happen.

No need to consult an expert for this one. The custom code is pretty straightforward and should work across different Webflow projects.