Why did my style change on multiple pages?

You changed a button color on your homepage, and suddenly every button across your entire site has the new color. This isn't a bug — it's how Webflow's class-based styling system is designed to work.

The cause: global classes

Webflow uses CSS classes to style elements, and those classes are global by nature. When you edit a class like button-primary, every element on every page that uses button-primary inherits the change immediately.

This is identical to how CSS works on the web. A class definition exists once, and every element referencing it follows the same rules. Webflow makes this visible through its Style panel — the class name at the top shows you exactly which selector you're modifying.

How to check which elements use a class

Before making changes, you can see the impact:

1. Select an element with the class you want to change
2. In the Style panel, hover over the class name
3. Webflow highlights all elements using that class on the current page

For a full picture, use the Navigator panel (left sidebar) to scan other pages in your project for the same class name.

Preventing unintended changes

Create a new class instead of editing the existing one. If you need a button on one page to look different, give it a different class. You can start fresh or use a combo class to inherit the base styles and override only what needs to change.

Use combo classes for variations. A combo class stacks on top of an existing one. For example, button-primary + large lets you override the size without touching the base button-primary styles used elsewhere.

Check before you save. The Style panel always shows the class you're editing. If the name is generic (like heading or text-block), assume it's used widely.

What to do if changes already happened

If you already edited a class and affected multiple pages:

1. Press Ctrl+Z (or Cmd+Z) to undo the change
2. Create a new class or combo class for the element that needs the different style
3. Re-apply the change only to the new class

Webflow's undo history is per-session, so this works as long as you haven't closed the Designer since the change.

Summary

Style changes propagate across pages because classes are global. The solution is simple: use separate classes or combo classes for elements that need to look different. Treat class names as reusable design tokens — if the design differs, the class should too.