Use my shopping cart inside my styling

Hi, I am trying fine tune my website to keep the layout the same throughout but to integrate my shopping cart more. My site is based largely on php and css (https://www.millrivergardensupply.com) and basically what I want is that when a user clicks on shop that it will bring up my cart in the content body while keeping the same sidebar and header. In my shop I want the sidebar moved to the right (which I know how to do) and the category tabs kept but everything else gone. Is this possible?

Since all the pages you have on your main site (Contact Us, About Us, and Newsletter) are included in Zencart or can be added using mods, I would strongly suggest you just use Zencart as your whole site and style it to look the way you want. Much easier.

is there an "easy" way to use the css that I have done for the main site and override the zen cart styling to make it look the way I want it?

Here's a fun little experiment.

Rename the stylesheet.css file in your custom template dir. Add .txt or something.

The zen cart pages will display without css.

Make an empty stylesheet.css.

Use the sectors and classes from the zc css, add your formating.