To customize the styling, go to the cascading style sheet (CSS) of the product template from the top option
Figure 1: List of Templates to edit
Inside the CSS page, you’ll find the complete style sheet codes of your template. Add, modify, remove or update any style using Product Template CSS.
Please make sure to backup the content first before start editing the CSS.
Figure 2: Template Editor with CSS Editing Mode
Once you are done with the CSS changes, please Refresh the build to apply the changes.