* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#container {
  position: relative;
  width: 100%;
  height: 100%;
  background-image: url('background-desktop.jpg');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: contain;
  background-color: black;
}

.bouncer {
  position: absolute;
  width: 100px;
  height: 100px;
  pointer-events: auto;
  user-select: none;
  cursor: pointer;
  z-index: 10;
  display: block;
}

@media (max-width: 768px) {
  #container {
    background-image: url('background-mobile.jpg');
  }
}