I need help fixing the mobile responsive design of my form especially the country field

Hi Jot support. I've been working on my form to make it mobile responsive accor. to my custom design. I've been facing issue in adjusting the country field that is overlapping with the comment, you can see it here: http://whatismyscreenresolution.net/multi-screen-test?site-url=https://form.jotformeu.com/72426090382353&w=768&h=1366

I'll really appreciate if you can point the possible issue/code mistake or fix it that would be great. 

Many thanks

I've fixed it for you by adjusting your custom CSS codes to use the percentage instead of the fixed value. See screenshot: