:active before click:
  inner: false
  outer: false
:active during mousedown on #inner:
  inner: true
  outer: true
  body: true
:active after mouseup:
  inner: false
  outer: false
:active during mousedown on #checkbox:
  label: false
  checkbox: true
:active after mouseup on #label:
  label: false
  checkbox: false
:active during mousedown on #label:
  label: true
  checkbox: true
:active after mouseup on #label:
  label: false
  checkbox: false