Bootstrap Template for Zen Cart
|Determining screen size
|CSS Media Queries
|Single CSS file
|Separate CSS for desktop, tablet and phone
|Requires different CSS for landscape vs portrait on mobile devices
|Lists specific devices
Again, each of these points of difference is actually an advantage for Bootstrap; the way it does things is more modern and suited to a mobile-first world. Note further that the disadvantages of Responsive Classic are also present in the older Picaflor Azul Responsive templates and most templates from stores like ThemeForest. The Bootstrap Template is really your best option.
Bootstrap template version 3.X is based on Bootstrap 4. You can find the exact version of Bootstrap (
major.minor.patch) in use by looking at the file
Bootstrap Template - Product Page (Desktop)
Bootstrap Template - Product Page (Mobile)
Colors in the Bootstrap Template
One of the best things about the Bootstrap template is that it puts the control of colors in the hands of the storeowner. Using Admin > Tools > ZCA Bootstrap Colors, you can set many of the colors in your template.