.fractal {
  position: fixed;
  top: 0;
  left: 0;
}
.fractal canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
}
.fractal.split canvas {
  display: block !important;
  width: 50vw;
}
.fractal canvas#julia {
  display: none;
  left: unset;
  right: 0;
}

.fractal .controls {
  display: flex;
  position: fixed;
  bottom: 0;
  width: 100%;
  margin: auto;
  justify-content: center;
}
.fractal .controls select {
  text-align: center;
  padding: 0.25em;
  margin: 0.5em;
}