I went through your website and I observed the following:
1. All sections are getting re-sized except .mainColRegL2, so the problem is most likely in the css for that section.
2. Your mobile.css uses the @media query for:
(min-device-width: 320px) and (max-device-width:1280px).
That leaves out any devices smaller than 320px. You could alternatively use:
media=”screen and (max-width:1280px)”
It would serve the same purpose, allow devices less than 320px wide and allow testing the responsiveness in the browser.
3. After playing with a bit more, by saving a local copy and implementing the change suggested in #2, I was able to identify the source of your problem. It is on line 2191 in mobile.css:
#mainReg .mainColRegL2 {
width:auto !important;
padding-left:10px !important;
padding-right:10px !important;
}
Change that to:
#mainReg .mainColRegL2 {
width:100%;
padding:0;
}
This will solve this issue, but you may want to look into using a css reset.
Eric Meyer’s Reset or Normalize.css may be a good start.
This will also help:
https://css-tricks.com/box-sizing/
