body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: black;
}
.controls {
  display: flex;
  flex-direction: row;
  position: absolute;
  bottom: 0px;
  left: 0px;
  width: 100%;
}
.controls div {
  border: 1px solid rgba(125, 125, 125);
  border-radius: 0.5em;
  font-size: 1em;
  min-width: 2em;
  margin: 0.1em 0.2em;
  color: whitesmoke;
  padding: 0.3em;
  text-align: center;
  font-family: arial;
  user-select: none;
  cursor: pointer;
}
.info {
  position: absolute;
  top: 0px;
  color: whitesmoke;
  font-family: arial;
}
.main-canvas {
  position: absolute;
  left: 50%;
  top: 50%;
}