body {
  margin: 0px;
  overflow: hidden;
  /* height: 100%; */
}

div#controls {
  padding: 10px;
  background-color: rgb(192, 192, 192);
}

canvas#canvas {
  border: solid;
}

div.canvas-div {
  margin: 10px;
}

div.code {
  background-color: #fff;
}

.help-btn {
  height: 25px;
  width: 25px;
  background: #fff;
  font-size: 18px;
  text-align: center;
  border-radius: 50%;
  cursor: pointer;
  float: right;
}

.popup {
  /* width: 560px; */
  /* height: 100px; */
  text-align: left;
  display: none;
  /* overflow: hidden; */
  position: relative;
  background: #eee;
  transition: 1s;
}

.help:hover .popup {
  display: inline;
}