css 100% responsiveness

 <style>
.abc{

normal view
}  

@media screen and (max-width: 767px) {
   .abc{
   
mobile view
   }
}
@media screen and (min-width: 1920px) {
   .abc {
    
    above 20 inch displays
   }
   }

    @media only screen
  and (min-device-width: 768px)
  and (max-device-width: 1024px)
  and (-webkit-min-device-pixel-ratio: 1) {
    .abc {

tablet view

}   
}
    </style>