Why does the whole page styling on my Webflow site change when I publish it, including the Navbar, after adding the uploadcare widget to a form?

When you add the Uploadcare widget to a Webflow form and publish your site, it may interfere with your global styles or default CSS rules, causing unexpected changes like altered Navbar design or page-wide styling shifts.

1. Uploadcare May Inject Global CSS

• The Uploadcare widget automatically loads its own external JavaScript and CSS files, which can unintentionally override Webflow's default styles.
• These styles may include resets or global rules (e.g., input, button, or body styling) that conflict with Webflow’s design system.
• Because Webflow does not sandbox third-party embeds, any external CSS can affect your entire project.

2. CSS Specificity or Conflicts Affect Layout

• Uploadcare CSS might have higher specificity or use !important, overriding styles on elements like your Navbar or forms.
• If your Webflow styles rely on default HTML tags (like styling <form> or elements without specific classes), external styles can easily override them.
• The issue only appears on publish because Webflow Designer contains sandboxing or doesn’t load third-party scripts until you preview the full page live.

3. Improper Embed Location or Use

• If the Uploadcare script was added directly inside the Form Embed or Page Custom Code, it could impact sibling elements globally, especially if styles leak outside their intended scope.
• Placing the widget too high in the page hierarchy can affect other layout containers or flex/grid settings.

4. Conflicting Class Names or IDs

• Uploadcare might use common class names like .container, .field, or .form, which are also used in Webflow.
• A naming collision could result in your elements inheriting Uploadcare’s styling rules.

5. Rendering Differences Between Designer and Publish

• Webflow Designer isolates some live scripts to protect the building experience.
• Upon publish, all external resources fully load, making their style and JS effects apparent.

Summary

The Uploadcare widget injects its own global CSS and JavaScript, which may override or conflict with your Webflow styles—especially on publish. These conflicts can affect elements like the Navbar, inputs, and layout containers. To resolve, use class-specific selectors, inspect with browser dev tools, or isolate the Uploadcare script using custom code scoped to its container.