Hello,
I've updated the Foundation theme for Moodle 3.7: https://moodle.org/plugins/pluginversion.php?id=20341.
It is now stable and has the following changes:
- Put back collapsible block functionality.
- Improve login page opacity.
I have made the theme stable as there has not been any reports of issues recently and I hope by being stable that it will get more popular.
Gareth