body,
html {
  margin: 0;
  padding: 0;
  background-color: #e2147f;
  overflow: hidden;
}

.main_wrapper {
  width: 40%;
  height: 70%;
  margin: auto;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
}

@media only screen and (max-width: 768px) {
  .main_wrapper {
    width: 90%;
    height: 70%;
  }
}

.main_wrapper .img-responsive {
  width: 100%;
  max-height: 100%;
  display: block;
}