* {
  margin: 0;
  padding: 0;
}

body {
  --imgw: 1391;
  --imgh: 2471;
  width: 100vw;
  min-height: calc(100vw * var(--imgh) / var(--imgw));
  /* make sure the whole height of the image is always shown */
  background-image: url(/afbeeldingen/jirnsum.jpg);
  background-size: cover;
}