html, body {
    height: 100%;
    background-color: white;
}
.container {
  position: relative;
  width: 100%;
  height: 100%;
  /*outline: dashed 1px black;*/
  display: block;
}

 .jpg {
     display: block;
    width: 90%;
    height: 90%;
     margin: 0 auto;
}

.jpg-mob {
    display: none;
    width: 90%;
  height: 90%;
     margin: 0 auto;
}
img {
    width: 100%;
  height: auto;
}

@media only screen and (max-width: 480px) {
    .jpg {
    display: none;
    }
    .jpg-mob {
    display: block;
}
}