body {
  margin: 0;
  overflow: hidden;
  background: #ddd;
}
body {
  margin: 12px;
}

#canvasWrap {
  display: inline-block;
}

#controls {
  margin-top: 8px;
}

#clearBtn {
  padding: 6px 10px;
  font-size: 14px;
  border: 1px solid #222;
  background: #f5f5f5;
  cursor: pointer;
}

#clearBtn:active {
  transform: translateY(1px);
}