Papi-Moondog

On mobile, product items and information stack vertically on smartphones, tablets, and narrow browsers. What is some custom code so product items can be stacked horizontally in columns of two? I am trying to show two product items side by side when the user is viewing the website on their mobile device. I have seen this done on other websites so I know it can be done but I'm not sure where to start or where to go for help 😞