/* Set height to 100% for body and html to enable the background image to cover the whole page: */
body,
html {
  height: 100%;
  overflow: hidden;
  background: linear-gradient(180deg, #f7ffff 0%, #e9f5f5 100%);
}

.middle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.middle img {
  width: 100%;
}