/* sm */
@media screen and (min-width:640px)  {
  
}
/* md */
@media screen and (min-width:768px) {
 
    
    .caption h1{

        font-size: 4rem;
    }

}
/* lg */

@media screen and (min-width:1024px) {
   

}
/* xl */
@media screen and (min-width:1280px) {
   
}
/* 2xl */
@media screen and (min-width:1536px) {
   
   
}