html,
body {
  height: 100%;
  padding: 15px;
}

.ng-valid[required], .ng-valid.required  {
    border-left: 5px solid #42A948; /* green */
}

.ng-invalid:not(form)  {
    border-left: 5px solid #a94442; /* red */    
}

.tooltip-campo-obligatorio {
  position: absolute;  
}