html, body {
  height: 100%;
  width: 100%;
}
body {
  margin: 0;
  font-size: 0;
  background-color: #eee;
  font-family: 'Open Sans', sans-serif;
  touch-action: none;
  user-select: none;
}
#vignette {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 100;
  background-image: radial-gradient(transparent, rgba(0,0,0,0.4));
}
#ground {
  background-color: white;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50vh;
  z-index: -1;
}
.elements-3d {
  position: fixed;
  top: 50vh;
  left: 50vw;
  height: 0;
  width: 0;
}
#elements {
  margin: 0;
  padding: 0;
  list-style: none;
}
.elements-3d > li {
  position: absolute;
  margin-top: -100px;
  margin-left: -100px;
  top: 0;
  left: 0;
  width: 200px;
  height: 200px;
}
#elements > li {
  box-shadow: 0 0 0 0 rgba(0,0,0,0.1);
  /* Uncomment for offline development */
  /* box-shadow: 0 0 0 1px rgba(0,0,0,0.1); */
  border-radius: 10px;
  transition: box-shadow .2s;
}
#elements > li:hover {
  box-shadow: 0 0 0 5px rgba(0,0,0,0.1);
}
#elements > li a {
  height: 100%;
  width: 100%;
  display: block;
  text-decoration: none;
}
.elements-3d > li img {
  height: 100%;
  width: 100%;
}
#elements > li img {
  border-radius: 10px;
  font-size: 16px;
}
.circle {
  border-radius: 50%;
}
#red {
  background-color: #f44336;
}
#blue {
  background-color: #2196F3;
}
#instructions {
  font-size: 24px;
  margin: 0;
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: rgba(0,0,0,0.7);
  box-sizing: border-box;
  padding: 0 10px;
  animation: fadein .5s forwards, fadeoutabit .5s 3s forwards;
  transform-origin: bottom;
}
@keyframes fadein {
  from {
    margin-bottom: 5px;
    opacity: 0;
  }
  to {
    margin-bottom: 30px;
    opacity: 1;
    font-size: 24px;
  }
}
@keyframes fadeoutabit {
  from {
    opacity: 1;
    transform: scale(1);
    margin-bottom: 30px;
  }
  to {
    opacity: 0.3;
    transform: scale(0.7);
    margin-bottom: 34px;
  }
}
#joystick {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  margin: 50px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.5);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}
#joystick.show {
  display: block;
}
.bubble {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50px;
  height: 50px;
  background-color: rgba(230, 230, 230, 0.8);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
  opacity: 0.3;
}
.moving .bubble {
  opacity: 1;
  left: var(--x);
  top: var(--y);
}
.noscript {
  color: magenta;
  background-color: yellow;
  font-family: 'Comic Sans', cursive;
  font-size: 16px;
}