@media (max-width: 575px) { 
 
 .px-4{
     width: 350px;
     text-align: center;
 }
    .px-4 h1{
        font-size: 2rem !important;
    }
 .masthead .masthead-content {
  position: relative;
  max-width: 40rem;
  padding-top: 4rem;
  padding-bottom: 2rem;
}

}