.input-shell > i{
  top:50%;
  transform:translateY(-50%);
  display:grid;
  place-items:center;
  width:20px;
  height:20px;
  line-height:1;
}

.input-shell .password-toggle{
  top:50%;
  transform:translateY(-50%);
  display:grid;
  place-items:center;
  line-height:1;
}

.input-shell .password-toggle i{
  display:block;
  line-height:1;
}