Add additional styles to the tabs of the accordion block. This plugin uses css editor and works with all template families.

From your Squarespace account, go to the Custom CSS Editor. Copy and paste the code below into the Custom CSS Editor box.

Adjust the border, background, padding, margin, and border radius values to your liking. If using a full border, disable the Divider option in the accordion block’s settings.

Additional styles for fonts, icons, and the divider can be found in the accordion block’s settings.