Select Box Issue

I’ll look at this ASAP

I maintain a demo version of the plugin at https://liddweaver.com/responsive-mortgage-calculator/demo/ which you can use to test basic styling and functionality. In Chrome, Firefox, and Safari it appears satisfactory.

That said, I may have recently rewritten some of the plugin’s CSS in a way that conflicts with your theme’s CSS. I can’t tell what the issue is from a screenshot but I recommend targeting the select element wrap using .lidd_mc_form .lidd_mc_select_fancy_light, the select element using .lidd_mc_form .lidd_mc_select_fancy_light select, and the down arrow using .lidd_mc_form .lidd_mc_select_fancy_light:after and override the styles.