.responsive {
  width: 100%;
  max-width: 800px;
  height: auto;
  
}

.centered {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

  body {
    overflow: auto ;
  }

@media only screen and (min-width: 400px) {
  body {
    background-color: #415DB3;
  }
}