[Coriolan161]

Black_Star,

mySelector {
    /*...*/
   }
   
   mySelector:before {
     /*...*/
   }

   mySelector .bg-black {
    /*...*/
   } 

   mySelector .bg-black:before {
    /*...*/
   } 

   mySelector .text-green {
     /*....*/
   }

   mySelector .text-green:before {
     /*....*/
   }