Mobile display problem

Hello, I’m experiecing a problem with the wp glossary plugin.
in fact, the plugin works just fine on my website, but when the plugin is already activated and I visit my site through a mobile device, the little box doesn’t display properly.
it’s quite difficult to read because the box doesn’t display well.

the plugin is excelent. and I’d like you to improve the plugin to be able to display much better on device mobiles.
by the way, my website is https://www.trabajosonlineweb.com
Thanks in advance.

https://www.ads-software.com/extend/plugins/wp-glossary/