CSS relationship between each level

if want to change CSS to center text for table cell need to do in the <Td class=....>

<td class="cust-fa-center">
  <i ng-show="!ar.editing && selectedVisibility == 'Active'" ng-click="doneEditPOA(ar)" class="fa fa-eye cust-fa-size-green" aria-hidden="true"></i>
  <i ng-show="!ar.editing && selectedV