Responsive: Theme Byblos for mobile

Hi, I have your theme Byblos on my website (www.mientrenopersonal.com). It looks well, however in the mobile it needs the responsive function, due to the theme doesn’t look inside the interface (for example, the contact site). Could you please let me know how can I fix/change the mobile visual properties?

Thanks

The page I need help with: [log in to see the link]