body {
  background-color: "#333333";
}

#wrap {
  width: 100vw;
  height: 75vw;
  max-height: 100vh;
  max-width: 133.33vh;
  margin: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

#myEchantillon {
  z-index: 999;
  display: block;
  padding-bottom: 20px;
  padding-right: 20px;
}