Form controls
One bare `<input type=checkbox class="cb">`: 18px, navy when checked, with an indeterminate dash for a partly selected table header.
Lifted from the approved family page at build time; interact with it.
Checkbox · groups, select-all with a mixed state, locked options and confirm ticks.
Tick to confirm before saving.
.fc-ck.cbinput:indeterminate.fc-lockt.fc-group--r-chip--primary--focus-ring from families/form-controls/#checkbox