iotaCSS allows you to fully customize all classes based on your needs. Assuming you would like to change the syntax of
the classes from .u-jc-start to u-justify-content-start. To do this, you should update the namespace classes:
By enabling the responsive justify content utilities, you have access to a set of utility classes which bind to breakpoints. By
default, they bind to the iotaCSS global breakpoints specified in Settings.Core.
Div with justify-content: center; on mobile and justify-content: flex-start; on tablets and up.
Set breakpoints only for justify content utility
In case you would like to use different breakpoints to justify content utility only, you should use the local variable.