How can I achieve a background blur effect in a div block on my hero element using Webflow? I want to ensure that thin text remains legible while overlaying a background hero image.

To achieve a background blur effect in a div block on your hero element in Webflow, you can use a combination of CSS properties and Webflow interactions. Here's a step-by-step guide:

1. Add a div block to your hero element: Start by adding a div block as a child element within your hero section. This div block will serve as the container for your background image and the text overlay.

2. Set up your background image: Upload and set your background image for the div block using the background property. Make sure the image is positioned and sized appropriately. You can do this by selecting the div block, going to the Style panel, and under the Background section, choosing your image.

3. Apply the blur effect: To apply the blur effect, you can use a combination of the filter and backdrop-filter properties in the Custom Code section of the Style panel for the div block. Add the following code:

```css
div {
filter: blur(10px);
backdrop-filter: blur(10px);
}
```

Adjust the blur value as needed to achieve the desired effect. The `filter` property applies the blur effect to the whole div, including the text, while the `backdrop-filter` property applies the blur effect only to the background of the div, leaving the text unaffected.

4. Add a text overlay: You can add a text element as a child within the div block to serve as your text overlay. Style the text with an appropriate font, size, and color to ensure legibility.

5. Fine-tune the effect: If the blur effect is too intense, you can adjust the blur value to make it more subtle. You can also experiment with other CSS properties like opacity or adding a semi-transparent overlay to achieve the desired aesthetic.

6. Add interactions (optional): To enhance the user experience, you can create interactions using Webflow's built-in Interaction panel. For example, you could add a hover interaction to the div block that reduces the blur effect or adds a color overlay when the user hovers over it, making the text even more legible.

Remember to preview and test your design on different devices and screen sizes to ensure the text remains legible and the blur effect looks visually appealing.