body {
  flex-direction: row;
}
body > canvas {
  image-rendering: pixelated;
  margin: auto;
}
body > div.settings {
  position: absolute;
  top: 0;
  right: 0;
  padding: 1rem;
  background: rgba(0,0,0,0.5);
  color: #fff;
  z-index: 1;
}
input[type=range] {
  border: none;
  box-shadow: none;
  padding: 0;
}
div.editor {
  padding: 2rem;
}
div.editor:empty {
  display: none;
}
form.palette {
  padding: 1rem;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: auto;
  background: #fff;
  width: 640px;
  height: 480px;
}
form.palette > input {
  width: 100%;
}
form.palette > .option.active {
  background: rgba(0,0,255,0.25);
}