How can I change the color of a button on my side nav in Webflow when it is pressed and its landing page is opened?

To change the color of a button on your side navigation when it is pressed and its landing page is opened in Webflow, you can use a combination of Webflow's built-in interactions and CSS classes.

Here's a step-by-step guide to accomplish this:

1. Design your button and side navigation:
- Create a button element within your side navigation.
- Customize its appearance, such as background color, text color, and any other styles you want to be applied.

2. Set up the interaction:
- Select the button element within your side navigation.
- Go to the Interactions panel on the right-hand side.
- Click on the "+" button to create a new interaction.
- Choose the trigger for the interaction. In this case, you want it to be triggered when the landing page is opened. You can use the "Page Load" trigger and select the specific landing page.
- Select the "Affect Different Element" action and choose the button element itself.
- Choose the "Add a Class" action type.
- Click on the "Add Class" button and give it a name, such as "button-active" or any other descriptive name. Set the desired styles for this class (e.g., different background color).
- In the "When" field of the interaction, select "Page Load" as the condition, and set it to "Page X is on load".
- Click on "Create Animation" and set the desired duration, delay, and easing for the animation. This allows you to control the transition effect when the landing page is loaded.

3. Style the active button state with CSS:
- Go to the Style panel.
- Under the Selector field, add a new selector by typing ".button-active" (or the class name you gave in the interaction).
- Customize the styles for the active state of the button, such as a different background color or any other visual changes you want to apply.
- Ensure that these styles will override the default button styles.

4. Preview and test:
- Preview your site to see the changes in action.
- When you navigate to the landing page that corresponds to the button in the side navigation, the button should have the updated color or styles you specified.

By combining interactions and CSS, you can easily change the color of a button on your side navigation when it is pressed and its landing page is opened in Webflow. Remember to carefully name your interactions and CSS classes for easy identification and maintenance.