html, body {
  height: 100%;
  margin: 0;
  background: #1a1a1a;
}

canvas {
  display: block;
}

#reload {
  position: absolute;

  right: calc(45vw + 10px);
  top: 10px;

  border: none;
  padding: 2px 4px;
  background: #fff;

  font-size: 14px;
  font-family: 'Helvetica Neue';
}

#reload:active {
  background: #ccc;
}

#editor {
  float: right;

  width: calc(45vw - 10px);
  height: calc(100vh - 20px);

  margin: 10px 10px 10px 0;
}