.selected-canvas-element {
  /* TODO: Add a proper selected canvas element effect. */
}

.selected-canvas-element {
  box-shadow: 0 0 16px black;
  background: rgba(255, 255, 255, 0.5);
}
Revert "Remove selected canvas element effect CSS."
Revert "Remove selected canvas element effect CSS."

This reverts commit 8f1a92da474b8a8f55adc9abf485d14d84d27125.
